hook for volcanoes essay

Writing Prompts about Volcano

• 🗃️ Essay topics
• ❓ Research questions
• 📝 Topic sentences
• 🪝 Essay hooks
• 📑 Thesis statements
• 🔀 Hypothesis examples
• 🧐 Personal statements

🔗 References

🗃️ essay topics about volcano.

• The formation and types of volcanoes.
• The future of Volcano research and monitoring techniques.
• Volcanoes and their contribution to Earth’s biodiversity.
• The cultural and spiritual beliefs associated with volcanoes.
• The role of volcanoes in shaping Earth’s landscape.
• Volcanoes and their connection to hot springs and geysers.
• The role of volcanoes in climate change.
• Connections and impacts between volcanoes and climate change.
• Volcanoes and their effect on human settlements.
• The role of volcanoes in the formation of islands.
• Comparative studies of volcanoes on other planets.
• Volcanoes and their impact on wildlife and ecosystems.
• The cultural and mythological significance of volcanoes.
• Volcanoes and their relationship to plate tectonics.
• The cultural significance of volcanoes in different societies.
• The role of volcanoes in Earth’s climate system.
• Volcanoes and their connection to earthquakes.
• Volcanoes and the formation of minerals and rocks.
• The role of volcanoes in the carbon cycle.
• Volcanic monitoring and volcano forecasting techniques.

❓ Essay Questions on Volcano

• What are the main factors that contribute to volcanic eruptions?
• How do different types of volcanoes form and what are their characteristics?
• What are the environmental impacts of volcanic eruptions?
• How does volcanic activity influence climate change?
• What are the effects of volcanic ash on air travel and infrastructure?
• How do volcanic eruptions impact human health?
• What are the long-term effects of volcanic eruptions on ecosystems and biodiversity?
• How can volcanic activity be monitored and predicted?
• What are the historical records of major volcanic eruptions and their consequences?
• How do volcanic eruptions contribute to the formation of new landforms?
• What are the volcanic hazards and risks associated with living near active volcanoes?
• What is the relationship between tectonic plate boundaries and volcanic activity?
• How do volcanic eruptions impact global climate patterns and weather systems?
• How can volcanic eruptions be mitigated and their risks minimized?
• What are the social and psychological impacts of living in volcanic hazard zones?

📝 Volcano Topic Sentence Examples

• Volcanoes, powerful geological phenomena, shape the Earth’s landscape through their eruptions, leaving behind distinctive landforms and geological features.
• The study of volcanoes provides valuable insights into Earth’s inner workings, aiding in our understanding of plate tectonics, magma composition, and volcanic hazards.
• The study of volcanoes provides valuable insights into the Earth’s internal processes and the behavior of molten rock beneath the surface.

🪝 Top Hooks for Volcano Paper

📍 definition hooks for essay on volcano.

• A volcano is a geological feature characterized by a rupture in the Earth’s crust through which molten rock, gases, and ash are expelled, often accompanied by explosive eruptions or effusive lava flows.
• Volcano, derived from the Latin word ‘vulcanus,’ refers to a vent or opening in the Earth’s surface through which molten rock, known as magma, escapes from beneath the crust, showcasing the dynamic nature of our planet’s geology.

📍 Statistical Hooks on Volcano for Essay

• Statistical data reveals that there are approximately 1,500 active volcanoes worldwide, with over 50 eruptions occurring each year, highlighting the ongoing geological activity and the significance of understanding volcanic processes.
• According to the United States Geological Survey, there are approximately 1,500 active volcanoes worldwide, with an average of 50-70 eruptions occurring each year. These statistics highlight the ongoing and dynamic nature of the volcanic activity, underscoring the need for continued research and preparedness.

📍 Question Hooks on Volcano

• Why do volcanoes erupt with such explosive fury, unleashing molten rock and sending plumes of ash high into the sky? What are the underlying geological forces that drive these fiery displays of nature’s power? Join us as we delve into the depths of volcanic mysteries and seek answers amidst the fiery chaos.
• Ready for a hot topic? Why do volcanoes ignite with a fiery passion, erupting in a spectacular show of molten mayhem? How do these geological time bombs shape our planet’s landscape and influence climate patterns? Let’s embark on a sizzling exploration of volcanoes and unlock the secrets beneath their explosive personalities.

📑 Good Volcano Thesis Statements

✔️ argumentative thesis samples about volcano.

• Volcanic eruptions are not merely destructive events, but also essential processes that contribute to the formation of landforms, enrich soil fertility, and create unique habitats. Therefore, recognizing the ecological and geological benefits of volcanoes is crucial for understanding their significance in shaping our planet.
• Volcanic eruptions pose significant threats to human lives, property, and the environment, necessitating comprehensive risk assessment, mitigation strategies, and proactive planning. Acknowledging the potential hazards of volcanoes is paramount to ensuring the safety and resilience of communities in volcanic regions.

✔️ Analytical Thesis Examples about Volcano

• Through a comprehensive analysis of geological data, historical records, and scientific studies, this essay examines the intricate processes of volcanic activity, shedding light on the factors that influence eruption patterns, magma composition, and the dynamic nature of volcanoes, contributing to a deeper understanding of Earth’s geological dynamics.
• By critically analyzing the socio-cultural, economic, and environmental impacts of volcanic eruptions, this essay investigates the complex interactions between humans and volcanoes, exploring the ways in which communities adapt, respond, and recover from volcanic hazards, ultimately informing future disaster preparedness and management strategies.

✔️ Informative Thesis on Volcano

• Volcanoes, geological formations that result from the release of molten rock, gases, and other materials, play a significant role in shaping Earth’s landscapes and impacting the environment. Understanding their formation, eruption mechanisms, and associated hazards is crucial for mitigating risks and safeguarding vulnerable communities.
• Volcanoes are dynamic natural phenomena that result from the movement of tectonic plates and the release of magma from Earth’s interior. Exploring their classification, eruptive processes, and environmental impacts helps us comprehend the Earth’s geological history and develop strategies to mitigate volcanic hazards.

🔀 Volcano Hypothesis Examples

• The size of a volcano impacts the volume of erupted magma.
• The size of the volcano crater affects the intensity of volcanic eruptions.

🔂 Null & Alternative Hypothesis on Volcano

• Null hypothesis: There is no significant relationship between the size of a volcano and its eruption frequency.
• Alternative hypothesis: The size of a volcano has a significant impact on its eruption frequency.

🧐 Examples of Personal Statement about Volcano

• My fascination with the power and beauty of volcanoes has driven my passion for earth sciences. Witnessing the force of an erupting volcano during a school trip ignited a curiosity that continues to fuel my academic pursuits. I am eager to unravel the mysteries of these natural wonders, explore their formation, study their behavior, and contribute to our understanding of their impact on our planet.
• Ever since I first learned about volcanoes, I have been captivated by their immense power and the fascinating geological processes behind their formation. The unpredictability and beauty of volcanic eruptions have inspired me to pursue a career in geology. I am eager to study volcanoes, their behavior, and the impact they have on the environment.
• Importance of the volcano slope to comprehend activity and selectivity trends in electrocatalysis
• What is a volcano?
• Encyclopedia of Volcanoes
• Transition from volcano-sagging to volcano-spreading
• Volcanic Eruptions and Climate

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Essays About Volcanoes: Top 5 Examples and 10 Prompts

Do you need to write essays about volcanoes but don’t know where to start? Check out our top essay examples and prompts to help you write a high-quality essay.

Considered the planet’s geologic architects, volcanoes are responsible for more than 80% of the Earth’s surface . The mountains, craters, and fertile soil from these eruptions give way to the very foundation of life itself, making it possible for humans to survive and thrive.  

Aside from the numerous ocean floor volcanoes, there are 161 active volcanoes in the US . However, these beautiful and unique landforms can instantly turn into a nightmare, like Mt. Tambora in Indonesia, which killed 92,000 people in 1815 .

Various writings are critical to understanding these openings in the Earth’s crust, especially for students studying volcanoes. It can be tricky to write this topic and will require a lot of research to ensure all the information gathered is accurate. 

To help you, read on to see our top essay examples and writing prompts to help you begin writing.

Top 5 Essay Examples

1. short essay on volcanoes by prasad nanda , 2. types of volcanoes by reena a , 3. shield volcano, one of the volcano types by anonymous on gradesfixer.com, 4. benefits and problems caused by volcanoes by anonymous on newyorkessays.com, 5. volcanoes paper by vanessa strickland, 1. volcanoes and their classifications, 2. a dormant volcano’s eruption, 3. volcanic eruptions in the movies, 4. the supervolcano: what is it, 5. the word’s ring of fire, 6. what is a lahar, 7. why does a volcano erupt, 8. my experience with volcanic eruptions, 9. effects of volcanic eruptions, 10. what to do during volcanic disasters.

“The name, “volcano” originates from the name Vulcan, a god of fire in Roman mythology.”

Nanda briefly defines volcanoes, stating they help release hot pressure that builds up deep within the planet. Then, he discusses each volcano classification, including lava and magma’s roles during a volcanic eruption. Besides interesting facts about volcanoes (like the Ojos del Salado as the world’s tallest volcano), Nanda talks about volcanic eruptions’ havoc. However, he also lays down their benefits, such as cooled magma turning to rich soil for crop cultivation.

“The size, style, and frequency of eruptions can differ greatly but all these elements are correlated to the shape of a volcano.”

In this essay, Reena identifies the three main types of volcanoes and compares them by shape, eruption style, and magma type and temperature. A shield volcano is a broad, flat domelike volcano with basaltic magma and gentle eruptions. The strato or composite volcano is the most violent because its explosive eruption results in a lava flow, pyroclastic flows, and lahar. Reena shares that a caldera volcano is rare and has sticky and cool lava, but it’s the most dangerous type. To make it easier for the readers to understand her essay, she adds figures describing the process of volcanic eruptions.

“All in all, shield volcanoes are the nicest of the three but don’t be fooled, it can still do damage.”

As the essay’s title suggests, the author focuses on the most prominent type of volcano with shallow slopes – the shield volcano. Countries like Iceland, New Zealand, and the US have this type of volcano, but it’s usually in the oceans, like the Mauna Loa in the Hawaiian Islands. Also, apart from its shape and magma type, a shield volcano has regular but calmer eruptions until water enters its vents.

“Volcanic eruptions bring both positive and negative impacts to man.”

The essay delves into the different conditions of volcanic eruptions, including their effects on a country and its people. Besides destroying crops, animals, and lives, they damage the economy and environment. However, these misfortunes also leave behind treasures, such as fertile soil from ash, minerals like copper, gold, and silver from magma, and clean and unlimited geothermal energy. After these incidents, a place’s historic eruptions also boost its tourism.

“Beautiful and powerful, awe-inspiring and deadly, they are spectacular reminders of the dynamic forces that shape our planet.”

Strickland’s essay centers on volcanic formations, types, and studies, specifically Krakatoa’s eruption in 1883. She explains that when two plates hit each other, the Earth melts rocks into magma and gases, forming a volcano. Strickland also mentions the pros and cons of living near a volcanic island. For example, even though a tsunami is possible, these islands are rich in marine life, giving fishermen a good living.

Are you looking for more topics like this? Check out our round-up of essay topics about nature .

10 Writing Prompts For Essays About Volcanoes

Do you need more inspiration for your essay? See our best essay prompts about volcanoes below:

Identify and discuss the three classifications of volcanoes according to how often they erupt: active, dormant or inactive, and extinct. Find the similarities and differences of each variety and give examples. At the end of your essay, tell your readers which volcano is the most dangerous and why.

Volcanoes that have not erupted for a very long time are considered inactive or dormant, but they can erupt anytime in the future. For this essay, look for an inactive volcano that suddenly woke up after years of sleeping. Then, find the cause of its sudden eruption and add the extent of its damage. To make your piece more interesting, include an interview with people living near dormant volcanoes and share their thoughts on the possibility of them exploding anytime.

Choose an on-screen depiction of how volcanoes work, like the documentary “ Krakatoa: Volcano of Destruction .” Next, briefly summarize the movie, then comment on how realistic the film’s effects, scenes, and dialogues are. Finally, conclude your essay by debating the characters’ decisions to save themselves.

The Volcanic Explosivity Index (VEI) criteria interpret danger based on intensity and magnitude. Explain how this scale recognizes a supervolcano. Talk about the world’s supervolcanoes, which are active, dormant, and extinct. Add the latest report on a supervolcano’s eruption and its destruction.

Identify the 15 countries in the Circum-Pacific belt and explore each territory’s risks to being a part of The Ring of Fire. Explain why it’s called The Ring of Fire and write its importance. You can also discuss the most dangerous volcano within the ring.

If talking about volcanoes as a whole seems too generic, focus on one aspect of it. Lahar is a mixture of water, pyroclastic materials, and rocky debris that rapidly flows down from the slopes of a volcano. First, briefly define a lahar in your essay and focus on how it forms. Then, consider its dangers to living things. You should also add lahar warning signs and the best way to escape it.

Use this prompt to learn and write the entire process of a volcanic eruption. Find out the equipment or operations professionals use to detect magma’s movement inside a volcano to signal that it’s about to blow up. Make your essay informative, and use data from reliable sources and documentaries to ensure you only present correct details.

If you don’t have any personal experience with volcanic eruptions, you can interview someone who does. To ensure you can collect all the critical points you need, create a questionnaire beforehand. Take care to ask about their feelings and thoughts on the situation.

Write about the common effects of volcanic eruptions at the beginning of your essay. Next, focus on discussing its psychological effects on the victims, such as those who have lost loved ones, livelihoods, and properties.

Help your readers prepare for disasters in an informative essay. List what should be done before, during, and after a volcanic eruption. Include relevant tips such as being observant to know where possible emergency shelters are. You can also add any assistance offered by the government to support the victims.Here’s a great tip: Proper grammar is critical for your essays. Grammarly is one of our top grammar checkers. Find out why in this  Grammarly review .

Maria Caballero is a freelance writer who has been writing since high school. She believes that to be a writer doesn't only refer to excellent syntax and semantics but also knowing how to weave words together to communicate to any reader effectively.

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125 Volcano Essay Topic Ideas & Examples

Inside This Article

Volcanoes are one of the most fascinating natural phenomena on Earth. From their explosive eruptions to the creation of new land, there is no shortage of topics to explore when it comes to volcanoes. If you are looking for inspiration for your next essay on volcanoes, look no further. Here are 125 volcano essay topic ideas and examples to get you started:

• The science behind volcanic eruptions
• The different types of volcanoes and how they form
• The role of plate tectonics in volcanic activity
• The impact of volcanic eruptions on the environment
• The history of volcanic eruptions around the world
• The cultural significance of volcanoes in different societies
• The relationship between volcanoes and climate change
• The benefits of living near a volcano
• The risks and challenges of living near a volcano
• The technology used to monitor and predict volcanic eruptions
• The impact of volcanic eruptions on air travel
• The economic impact of volcanic eruptions on local communities
• The history of volcano research and exploration
• The myths and legends surrounding volcanoes
• The impact of volcanic eruptions on wildlife and ecosystems
• The role of volcanoes in the formation of Earth's landforms
• The connection between volcanic activity and earthquakes
• The role of volcanic eruptions in shaping human history
• The impact of volcanic eruptions on agriculture and food security
• The relationship between volcanic eruptions and volcanic gases
• The role of volcanoes in the formation of mineral deposits
• The impact of volcanic eruptions on water quality
• The connection between volcanic eruptions and geothermal energy
• The impact of volcanic eruptions on tourism
• The history of famous volcanic eruptions, such as Mount Vesuvius and Mount St. Helens
• The impact of volcanic eruptions on indigenous communities
• The role of volcanoes in the creation of new land
• The impact of volcanic eruptions on global climate
• The relationship between volcanic eruptions and volcanic lightning
• The role of volcanoes in the formation of volcanic islands
• The impact of volcanic eruptions on human health
• The connection between volcanic activity and volcanic hotspots
• The role of volcanic eruptions in the formation of volcanic ash clouds
• The impact of volcanic eruptions on marine ecosystems
• The relationship between volcanic eruptions and volcanic mudflows
• The role of volcanic eruptions in the formation of volcanic craters
• The impact of volcanic eruptions on infrastructure and buildings
• The connection between volcanic activity and volcanic earthquakes
• The role of volcanic eruptions in the formation of volcanic domes
• The impact of volcanic eruptions on air quality
• The relationship between volcanic eruptions and volcanic gas emissions
• The role of volcanoes in the formation of volcanic arcs
• The impact of volcanic eruptions on soil fertility
• The connection between volcanic activity and volcanic tremors
• The role of volcanic eruptions in the formation of volcanic calderas
• The impact of volcanic eruptions on water resources
• The relationship between volcanic eruptions and volcanic tsunamis
• The role of volcanoes in the formation of volcanic rift zones
• The impact of volcanic eruptions on wildlife migration patterns
• The connection between volcanic activity and volcanic vents
• The role of volcanic eruptions in the formation of volcanic cones
• The impact of volcanic eruptions on indigenous knowledge and traditions
• The relationship between volcanic eruptions and volcanic seamounts
• The role of volcanoes in the formation of volcanic craters
• The impact of volcanic eruptions on human migration patterns
• The connection between volcanic activity and volcanic eruptions
• The role of volcanic eruptions in the formation of volcanic plateaus
• The impact of volcanic eruptions on geothermal energy production
• The relationship between volcanic eruptions and volcanic islands
• The role of volcanoes in the formation of volcanic plains
• The impact of volcanic eruptions on soil erosion
• The connection between volcanic activity and volcanic rocks
• The role of volcanic eruptions in the formation of volcanic ridges
• The impact of volcanic eruptions on biodiversity
• The relationship between volcanic eruptions and volcanic vents
• The role of volcanoes in the formation of volcanic ridges
• The impact of volcanic eruptions on human settlements
• The connection between volcanic activity and volcanic rifts
• The role of volcanic eruptions in the formation of volcanic chains
• The relationship between volcanic eruptions and volcanic cones
• The role of volcanoes in the formation of volcanic fields
• The impact of volcanic eruptions on wildlife habitats
• The role of volcanic eruptions in the formation of volcanic belts
• The impact of volcanic eruptions on cultural heritage sites
• The relationship between volcanic eruptions and volcanic ash clouds
• The impact of volcanic eruptions on agricultural productivity
• The role of volcanic eruptions in the formation of volcanic arches
• The relationship between volcanic eruptions and volcanic fissures
• The role of volcanoes in the formation of volcanic calderas
• The connection between volcanic activity and volcanic domes
• The role of volcanic eruptions in the formation of volcanic rift zones
• The connection between volcanic activity and volcanic plateaus
• The connection between volcanic activity and volcanic islands
• The role of volcanic eruptions in the formation of volcanic plains
• The relationship between volcanic eruptions and volcanic rocks

With so many interesting topics to choose from, you are sure to find the perfect subject for your volcano essay. Whether you are interested in the science behind volcanic eruptions, the cultural significance of volcanoes, or the impact of volcanic activity on the environment, there is a topic on this list that is sure to inspire you. Happy writing!

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70 Volcano Essay Topic Ideas & Examples

🏆 best volcano topic ideas & essay examples, 📌 most interesting volcano topics to write about, 👍 good research topics about volcano, ❓ essay questions about volcanoes.

• The Economic Impact of the Icelandic Volcano Eruptions on the International Economy So, it may be completed that even though the shutdown of the European airspace negatively affected the economics of the whole world and GDP level of the countries, there were the ways for solving the […]
• Eruption of Mount Saint Helen Volcano Helens volcano, looking at its history, the explosion, the immediate consequences of the eruption, and the historic impact on the climate and human life. We will write a custom essay specifically for you by our professional experts 808 writers online Learn More
• Haleakalā Volcano and Wai’anapanapa State Park Haleakal is a large shield volcano that is situated in the east of the Island of Maui and basically comprises this part of Maui.
• Hawaii – A Volcano in the Sea All the volcanoes in Hawaii are shield volcanoes. They are large and have shallow-sloping sides – almost like a warrior’s shield.
• Sparks Fly Over Theory That Volcano Caused Salmon Boom However, for the theory to be credible the volcanic ashes must be rich in iron and spread ashes to oceanic regions that have a limited concentration of iron.
• The Volcano and Aurora in Iceland In other words, the volcano Hekla was erupting from the surface of the earth while the natural light was shining from the sky.
• Review of Related Literature of Volcano Tourism in the Philippines
• The Human Response During a Calamity in A Living God by Lafcadio Hearn and The Volcano Next Door by Michael Finkel
• Investigating the Rate of Lava Flows Down the Side of a Volcano
• The Dangers of Living Too Close to a Volcano
• The Characteristics of Mount Vesuvius, the Only Active Volcano on the European Mainland
• Causes and Effect of Volcano Eruption
• The Most Famous Mount Kilauea Volcano in Hawaii
• The Devastation a Volcano Can Create Shown in In a Volcanoes Path
• What Fundamental Parameters Determine the Vigor or Violence with Which a Volcano Erupts
• The History and Possible Threats of Nyiragongo in The Volcano Next Door, a Book by Michael Finkel
• Volcano Eruptions Types
• Understanding How A Volcano Forms and Erupts
• Volcano: The Eruption and Healing of Mount St. Helens Critical
• The Mount Saint Helens and the Volcano Area in Washington State
• Planet and Live Erupting Volcano
• The Mount St. Helen and Mount Pinatubo Volcano Eruptionss
• The Most Active Volcano Of The Philippines
• An Active Super Volcano Lying Underneath Yellowstone Nation Park
• The Vesuvius Volcano Eruption and the Activities of the Cities Pompeii and Herculaneum
• Why This Volcano Eruption in the Philippines May Be Especially Deadly
• Sitting on a Volcano: Domestic Violence in Indonesia Following Two Volcano Eruptions
• Volcanoes: Volcano and Broad Domed Volcano
• The Lack of Volcano Physics in the Movies
• A Look at the Destructive Power of a Volcano
• An Analysis of the Destructive Power of a Volcano as One of the Most Violent and Deadly of All Natural Forces
• The Importance and Role of Hydrothermal Vents and Underwater Volcano
• Yellowstone: Volcano and Lieutenant Gustavus Doane
• The Devastating Effects of Volcano Eruptions in the U.S
• An Analysis of the Eruption of the Mount St. Helens Volcano on the 18th of May, 1980
• Volcanoes: Volcano and Eruptions Explosive Eruptions
• Volcanoes : The Volcano Of Tambora
• An Analysis of the Question Whether Germany Was Dancing on a Volcano
• The Three Systems to Faults Present in the Nevado del Ruiz Volcano Region
• An Analysis of the Soufriere Hills Volcano Eruption on Montserrat Island in 1997
• Why Can’t Toxic or Nuclear Waste Be Disposed of in Volcanoes?
• What Are the Four Basic Types of Volcanoes?
• What Exactly Are Super Volcanoes?
• Where Do Volcanoes Exist and How They Have Formed?
• Which Is the World’s Largest Volcano?
• What Causes Hotspot Volcanoes?
• What Are the Most Beautiful Volcanoes in the World?
• Which Are the Most Dangerous Volcanoes That Could End the World?
• Why Are Some Volcanoes More Hazardous Than Others?
• Are Volcanoes the Main Cause of Global Warming?
• What Would Be the Side Effects of Dumping Our Trash in Active Volcanoes?
• Is It Possible There Are Active Volcanoes on the Moon?
• Why Are There So Many Volcanoes in the Philippines?
• Is It Possible for Extinct Volcanoes to Ever Become Dormant or Active Again?
• Why Do Most Volcanoes and Earthquakes Occur at Plate Boundaries?
• What Are the Hazards Caused by Volcanoes?
• Why Are Plug Dome Volcanoes Considered Especially?
• What Are Most Dangerous Volcanoes in the US and Why?
• Why Can’t We Harvest Energy From Volcanoes?
• What Is the Most Interesting Thing About the Volcanoes?
• What Islands Have Volcanoes on Them?
• What Are the 3 Main Types of Volcanoes and Their Characteristics?
• Could the Earth Survive Without Volcanoes?
• Which Continent Does Not Have Volcanoes?
• Why Do Volcanoes Erupt on Mountains and Not on Flat Land?
• How Are Underwater Volcanoes Different From Land Volcanoes?
• How Often Do “Extinct” Volcanoes Become Active?
• Where Are the Most Active Volcanoes Located?
• What Is the Distribution of Volcanoes Around the World?
• How Do Volcanoes Influence Climate?
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IvyPanda . "70 Volcano Essay Topic Ideas & Examples." October 26, 2023. https://ivypanda.com/essays/topic/volcano-essay-topics/.

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33 Writing Prompts about Volcanoes

Mount St. Helens blew its top and captured the imagination and fear of Americans everywhere.

Of course, the destruction brought on by Mount St. Helens was nothing compared to the devastation of Krakatoa or the splendor of Vesuvius.

However, apart from being volcanoes, all of these events managed to capture the imagination of everyone who lived on the Earth to see their majesty and might.

Volcanoes still have that power in the classroom, from what students read to making paper mache volcanoes. So, letting them think more deeply upon volcanoes through these prompts will help spark a longer interest for them, as well as inspiring some wonderful writing along the way!

How to Use These Writing Prompts

There are a lot of ways to use these prompts.

You can use them over an extended period of time, or use them all in a day.

They can be used to jump into a discussion or as prompts to get students to think about volcanoes internally.

At any rate, the goal of these prompts is to spark curiosity in volcanoes and help students understand their importance in our lives and on Earth.

After all, volcanoes are responsible from everything from natural disasters to the formation of land as we know it today. 

The Writing Prompts About Volcanoes:

Here are thirty-three different writing prompts about volcanoes:

• What do you think it’s like to be near an erupting volcano?
• Are volcanoes scary? Why or why not?
• What are some potential after effects of a volcano?
• Is the initial eruption of a volcano worse than the after effects? Why or why not?
• What is volcanic rock, and how does it form?
• What is the Ring of Fire?
• If you could visit one volcano, which would it be?
• Would you want to see a volcano erupt in person?
• What type of impact do you think volcanic ash can have on the environment?
• How do volcanoes form islands?
• What are some famous volcanoes that you know? How do you know them?
• What does it mean for a volcano to blow its top?
• How long have volcanoes existed?
• Why are volcanoes important to how the Earth was formed?
• Some people think that it was volcanoes, and not a meteor, that killed the dinosaurs. Which do you think killed the dinosaurs? Why?
• Hot springs are considered to be a natural wonder that help you relax like a spa. They’re also a sign of a volcano. Would knowing this make it hard for you to relax? Why or why not?
• What do you think the worst volcanic eruption in American history is?
• What is a super volcano? 
• Yellowstone National Park is known as one of the most beautiful parks in the world. Underneath it is a super volcano. Would you still want to visit the park? Why or why not?
• Do you think any animals can live in a volcano? Which ones?
• What does it mean for a volcano to be dormant?
• What does it mean for a volcano to be extinct?
• Are active volcanoes always dangerous? Why or why not?
• A volcanologist is someone who studies volcanoes. Does this sound like an interesting job? Why or why not?
• Geologists study rocks and rock formations. How might this intersect with knowledge about volcanoes?
• How are volcanoes and earthquakes related?
• If you discovered a new volcano, what would you do?
• Pompeii was an ancient city that was destroyed by a volcano called Mt. Vesuvius. Today, it’s known for being incredibly well preserved due to the eruption, with people stuck in the middle of their everyday lives. What do you think when the people of Pompeii thought when Mt. Vesuvius erupted?
• Do all volcanoes have to be mountains?
• What is the difference between magma and lava?
• What are some different types of rocks that can be formed by a volcano?
• What are some cultures where volcanoes are significant?
• Do you know any books or movies where volcanoes are prominent? Do these depictions match reality?

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Volcanic Eruptions and Their Repose, Unrest, Precursors, and Timing (2017)

Chapter: 1 introduction, 1 introduction.

Volcanoes are a key part of the Earth system. Most of Earth’s atmosphere, water, and crust were delivered by volcanoes, and volcanoes continue to recycle earth materials. Volcanic eruptions are common. More than a dozen are usually erupting at any time somewhere on Earth, and close to 100 erupt in any year ( Loughlin et al., 2015 ).

Volcano landforms and eruptive behavior are diverse, reflecting the large number and complexity of interacting processes that govern the generation, storage, ascent, and eruption of magmas. Eruptions are influenced by the tectonic setting, the properties of Earth’s crust, and the history of the volcano. Yet, despite the great variability in the ways volcanoes erupt, eruptions are all governed by a common set of physical and chemical processes. Understanding how volcanoes form, how they erupt, and their consequences requires an understanding of the processes that cause rocks to melt and change composition, how magma is stored in the crust and then rises to the surface, and the interaction of magma with its surroundings. Our understanding of how volcanoes work and their consequences is also shared with the millions of people who visit U.S. volcano national parks each year.

Volcanoes have enormous destructive power. Eruptions can change weather patterns, disrupt climate, and cause widespread human suffering and, in the past, mass extinctions. Globally, volcanic eruptions caused about 80,000 deaths during the 20th century ( Sigurdsson et al., 2015 ). Even modest eruptions, such as the 2010 Eyjafjallajökull eruption in Iceland, have multibillion-dollar global impacts through disruption of air traffic. The 2014 steam explosion at Mount Ontake, Japan, killed 57 people without any magma reaching the surface. Many volcanoes in the United States have the potential for much larger eruptions, such as the 1912 eruption of Katmai, Alaska, the largest volcanic eruption of the 20th century ( Hildreth and Fierstein, 2012 ). The 2008 eruption of the unmonitored Kasatochi volcano, Alaska, distributed volcanic gases over most of the continental United States within a week ( Figure 1.1 ).

Finally, volcanoes are important economically. Volcanic heat provides low-carbon geothermal energy. U.S. generation of geothermal energy accounts for nearly one-quarter of the global capacity ( Bertani, 2015 ). In addition, volcanoes act as magmatic and hydrothermal distilleries that create ore deposits, including gold and copper ores.

Moderate to large volcanic eruptions are infrequent yet high-consequence events. The impact of the largest possible eruption, similar to the super-eruptions at Yellowstone, Wyoming; Long Valley, California; or Valles Caldera, New Mexico, would exceed that of any other terrestrial natural event. Volcanoes pose the greatest natural hazard over time scales of several decades and longer, and at longer time scales they have the potential for global catastrophe ( Figure 1.2 ). While

the continental United States has not suffered a fatal eruption since 1980 at Mount St. Helens, the threat has only increased as more people move into volcanic areas.

Volcanic eruptions evolve over very different temporal and spatial scales than most other natural hazards ( Figure 1.3 ). In particular, many eruptions are preceded by signs of unrest that can serve as warnings, and an eruption itself often persists for an extended period of time. For example, the eruption of Kilauea Volcano in Hawaii has continued since 1983. We also know the locations of many volcanoes and, hence, where most eruptions will occur. For these reasons, the impacts of at least some types of volcanic eruptions should be easier to mitigate than other natural hazards.

Anticipating the largest volcanic eruptions is possible. Magma must rise to Earth’s surface and this movement is usually accompanied by precursors—changes in seismic, deformation, and geochemical signals that can be recorded by ground-based and space-borne instruments. However, depending on the monitoring infrastructure, precursors may present themselves over time scales that range from a few hours (e.g., 2002 Reventador, Ecuador, and 2015 Calbuco, Chile) to decades before eruption (e.g., 1994 Rabaul, Papua New Guinea). Moreover, not all signals of volcanic unrest are immediate precursors to surface eruptions (e.g., currently Long Valley, California, and Campi Flegrei, Italy).

Probabilistic forecasts account for this uncertainty using all potential eruption scenarios and all relevant data. An important consideration is that the historical record is short and biased. The instrumented record is even shorter and, for most volcanoes, spans only the last few decades—a miniscule fraction of their lifetime. Knowledge can be extended qualitatively using field studies of volcanic deposits, historical accounts, and proxy data, such as ice and marine sediment cores and speleothem (cave) records. Yet, these too are biased because they commonly do not record small to moderate eruptions.

Understanding volcanic eruptions requires contributions from a wide range of disciplines and approaches. Geologic studies play a critical role in reconstructing the past eruption history of volcanoes,

especially of the largest events, and in regions with no historical or directly observed eruptions. Geochemical and geophysical techniques are used to study volcano processes at scales ranging from crystals to plumes of volcanic ash. Models reveal essential processes that control volcanic eruptions, and guide data collection. Monitoring provides a wealth of information about the life cycle of volcanoes and vital clues about what kind of eruption is likely and when it may occur.

1.1 OVERVIEW OF THIS REPORT

At the request of managers at the National Aeronautics and Space Administration (NASA), the National Science Foundation, and the U.S. Geological Survey (USGS), the National Academies of Sciences, Engineering, and Medicine established a committee to undertake the following tasks:

• Summarize current understanding of how magma is stored, ascends, and erupts.
• Discuss new disciplinary and interdisciplinary research on volcanic processes and precursors that could lead to forecasts of the type, size, and timing of volcanic eruptions.
• Describe new observations or instrument deployment strategies that could improve quantification of volcanic eruption processes and precursors.
• Identify priority research and observations needed to improve understanding of volcanic eruptions and to inform monitoring and early warning efforts.

The roles of the three agencies in advancing volcano science are summarized in Box 1.1 .

The committee held four meetings, including an international workshop, to gather information, deliberate, and prepare its report. The report is not intended to be a comprehensive review, but rather to provide a broad overview of the topics listed above. Chapter 2 addresses the opportunities for better understanding the storage, ascent, and eruption of magmas. Chapter 3 summarizes the challenges and prospects for forecasting eruptions and their consequences. Chapter 4 highlights repercussions of volcanic eruptions on a host of other Earth systems. Although not explicitly called out in the four tasks, the interactions between volcanoes and other Earth systems affect the consequences of eruptions, and offer opportunities to improve forecasting and obtain new insights into volcanic processes. Chapter 5 summarizes opportunities to strengthen

research in volcano science. Chapter 6 provides overarching conclusions. Supporting material appears in appendixes, including a list of volcano databases (see Appendix A ), a list of workshop participants (see Appendix B ), biographical sketches of the committee members (see Appendix C ), and a list of acronyms and abbreviations (see Appendix D ).

Background information on these topics is summarized in the rest of this chapter.

1.2 VOLCANOES IN THE UNITED STATES

The USGS has identified 169 potentially active volcanoes in the United States and its territories (e.g., Marianas), 55 of which pose a high threat or very high threat ( Ewert et al., 2005 ). Of the total, 84 are monitored by at least one seismometer, and only 3 have gas sensors (as of November 2016). 1 Volcanoes are found in the Cascade mountains, Aleutian arc, Hawaii, and the western interior of the continental United States ( Figure 1.4 ). The geographical extent and eruption hazards of these volcanoes are summarized below.

The Cascade volcanoes extend from Lassen Peak in northern California to Mount Meager in British Columbia. The historical record contains only small- to moderate-sized eruptions, but the geologic record reveals much larger eruptions ( Carey et al., 1995 ; Hildreth, 2007 ). Activity tends to be sporadic ( Figure 1.5 ). For example, nine Cascade eruptions occurred in the 1850s, but none occurred between 1915 and 1980, when Mount St. Helens erupted. Consequently, forecasting eruptions in the Cascades is subject to considerable uncertainty. Over the coming decades, there may be multiple eruptions from several volcanoes or no eruptions at all.

The Aleutian arc extends 2,500 km across the North Pacific and comprises more than 130 active and potentially active volcanoes. Although remote, these volcanoes pose a high risk to overflying aircraft that carry more than 30,000 passengers a day, and are monitored by a combination of ground- and space-based sensors. One or two small to moderate explosive eruptions occur in the Aleutians every year, and very large eruptions occur less frequently. For example, the world’s largest eruption of the 20th century occurred approximately 300 miles from Anchorage, in 1912.

In Hawaii, Kilauea has been erupting largely effusively since 1983, but the location and nature of eruptions can vary dramatically, presenting challenges for disaster preparation. The population at risk from large-volume, rapidly moving lava flows on the flanks of the Mauna Loa volcano has grown tremendously in the past few decades ( Dietterich and Cashman, 2014 ), and few island residents are prepared for the even larger magnitude explosive eruptions that are documented in the last 500 years ( Swanson et al., 2014 ).

All western states have potentially active volcanoes, from New Mexico, where lava flows have reached within a few kilometers of the Texas and Oklahoma borders ( Fitton et al., 1991 ), to Montana, which borders the Yellowstone caldera ( Christiansen, 1984 ). These volcanoes range from immense calderas that formed from super-eruptions ( Mastin et al., 2014 ) to small-volume basaltic volcanic fields that erupt lava flows and tephra for a few months to a few decades. Some of these eruptions are monogenic (erupt just once) and pose a special challenge for forecasting. Rates of activity in these distributed volcanic fields are low, with many eruptions during the past few thousand years (e.g., Dunbar, 1999 ; Fenton, 2012 ; Laughlin et al., 1994 ), but none during the past hundred years.

1.3 THE STRUCTURE OF A VOLCANO

Volcanoes often form prominent landforms, with imposing peaks that tower above the surrounding landscape, large depressions (calderas), or volcanic fields with numerous dispersed cinder cones, shield volcanoes, domes, and lava flows. These various landforms reflect the plate tectonic setting, the ways in which those volcanoes erupt, and the number of eruptions. Volcanic landforms change continuously through the interplay between constructive processes such as eruption and intrusion, and modification by tectonics, climate, and erosion. The stratigraphic and structural architecture of volcanoes yields critical information on eruption history and processes that operate within the volcano.

Beneath the volcano lies a magmatic system that in most cases extends through the crust, except during eruption. Depending on the setting, magmas may rise

___________________

1 Personal communication from Charles Mandeville, Program Coordinator, Volcano Hazards Program, U.S. Geological Survey, on November 26, 2016.

directly from the mantle or be staged in one or more storage regions within the crust before erupting. The uppermost part (within 2–3 km of Earth’s surface) often hosts an active hydrothermal system where meteoric groundwater mingles with magmatic volatiles and is heated by deeper magma. Identifying the extent and vigor of hydrothermal activity is important for three reasons: (1) much of the unrest at volcanoes occurs in hydrothermal systems, and understanding the interaction of hydrothermal and magmatic systems is important for forecasting; (2) pressure buildup can cause sudden and potentially deadly phreatic explosions from the hydrothermal system itself (such as on Ontake, Japan, in 2014), which, in turn, can influence the deeper magmatic system; and (3) hydrothermal systems are energy resources and create ore deposits.

Below the hydrothermal system lies a magma reservoir where magma accumulates and evolves prior to eruption. Although traditionally modeled as a fluid-filled cavity, there is growing evidence that magma reservoirs may comprise an interconnected complex of vertical and/or horizontal magma-filled cracks, or a partially molten mush zone, or interleaved lenses of magma and solid material ( Cashman and Giordano, 2014 ). In arc volcanoes, magma chambers are typically located 3–6 km below the surface. The magma chamber is usually connected to the surface via a fluid-filled conduit only during eruptions. In some settings, magma may ascend directly from the mantle without being stored in the crust.

In the broadest sense, long-lived magma reservoirs comprise both eruptible magma (often assumed to contain less than about 50 percent crystals) and an accumulation of crystals that grow along the margins or settle to the bottom of the magma chamber. Physical segregation of dense crystals and metals can cause the floor of the magma chamber to sag, a process balanced by upward migration of more buoyant melt. A long-lived magma chamber can thus become increasingly stratified in composition and density.

The deepest structure beneath volcanoes is less well constrained. Swarms of low-frequency earthquakes at mid- to lower-crustal depths (10–40 km) beneath volcanoes suggest that fluid is periodically transferred into the base of the crust ( Power et al., 2004 ). Tomographic studies reveal that active volcanic systems have deep crustal roots that contain, on average, a small fraction of melt, typically less than 10 percent. The spatial distribution of that melt fraction, particularly how much is concentrated in lenses or in larger magma bodies, is unknown. Erupted samples preserve petrologic and geochemical evidence of deep crystallization, which requires some degree of melt accumulation. Seismic imaging and sparse outcrops suggest that the proportion of unerupted solidified magma relative to the surrounding country rock increases with depth and that the deep roots of volcanoes are much more extensive than their surface expression.

1.4 MONITORING VOLCANOES

Volcano monitoring is critical for hazard forecasts, eruption forecasts, and risk mitigation. However, many volcanoes are not monitored at all, and others are monitored using only a few types of instruments. Some parameters, such as the mass, extent, and trajectory of a volcanic ash cloud, are more effectively measured by satellites. Other parameters, notably low-magnitude earthquakes and volcanic gas emissions that may signal an impending eruption, require ground-based monitoring on or close to the volcanic edifice. This section summarizes existing and emerging technologies for monitoring volcanoes from the ground and from space.

Monitoring Volcanoes on or Near the Ground

Ground-based monitoring provides data on the location and movement of magma. To adequately capture what is happening inside a volcano, it is necessary to obtain a long-term and continuous record, with periods spanning both volcanic quiescence and periods of unrest. High-frequency data sampling and efficient near-real-time relay of information are important, especially when processes within the volcano–magmatic–hydrothermal system are changing rapidly. Many ground-based field campaigns are time intensive and can be hazardous when volcanoes are active. In these situations, telemetry systems permit the safe and continuous collection of data, although the conditions can be harsh and the lifetime of instruments can be limited in these conditions.

Ground-based volcano monitoring falls into four broad categories: seismic, deformation, gas, and thermal monitoring ( Table 1.1 ). Seismic monitoring tools,

TABLE 1.1 Ground-Based Instrumentation for Monitoring Volcanoes

including seismometers and infrasound sensors, are used to detect vibrations caused by breakage of rock and movement of fluids and to assess the evolution of eruptive activity. Ambient seismic noise monitoring can image subsurface reservoirs and document changes in wave speed that may reflect stress. changes. Deformation monitoring tools, including tiltmeters, borehole strainmeters, the Global Navigation Satellite System (GNSS, which includes the Global Positioning System [GPS]), lidar, radar, and gravimeters, are used to detect the motion of magma and other fluids in the subsurface. Some of these tools, such as GNSS and lidar, are also used to detect erupted products, including ash clouds, pyroclastic density currents, and volcanic bombs. Gas monitoring tools, including a range of sensors ( Table 1.1 ), and direct sampling of gases and fluids are used to detect magma intrusions and changes in magma–hydrothermal interactions. Thermal monitoring tools, such as infrared cameras, are used to detect dome growth and lava breakouts. Continuous video or photographic observations are also commonly used and, despite their simplicity, most directly document volcanic activity. Less commonly used monitoring technologies, such as self-potential, electromagnetic techniques, and lightning detection are used to constrain fluid movement and to detect

ash clouds. In addition, unmanned aerial vehicles (e.g., aircraft and drones) are increasingly being used to collect data. Rapid sample collection and analysis is also becoming more common as a monitoring tool at volcano observatories. A schematic of ground-based monitoring techniques is shown in Figure 1.6 .

Monitoring Volcanoes from Space

Satellite-borne sensors and instruments provide synoptic observations during volcanic eruptions when collecting data from the ground is too hazardous or where volcanoes are too remote for regular observation. Repeat-pass data collected over years or decades provide a powerful means for detecting surface changes on active volcanoes. Improvements in instrument sensitivity, data availability, and the computational capacity required to process large volumes of data have led to a dramatic increase in “satellite volcano science.”

Although no satellite-borne sensor currently in orbit has been specifically designed for volcano monitoring, a number of sensors measure volcano-relevant

TABLE 1.2 Satellite-Borne Sensor Suite for Volcano Monitoring

NOTE: AIRS, Atmospheric Infrared Sounder; ALOS, Advanced Land Observing Satellite; ASTER, Advanced Spaceborne Thermal Emission and Reflection Radiometer; AVHRR, Advanced Very High Resolution Radiometer; CALIPSO, Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation; COSMO-SkyMed, Constellation of Small Satellites for Mediterranean Basin Observation; GOES, Geostationary Operational Environmental Satellite; IASI, Infrared Atmospheric Sounding Interferometer; MISR, Multi-angle Imaging SpectroRadiometer; MLS, Microwave Limb Sounder; MODIS, Moderate Resolution Imaging Spectroradiometer; OMI, Ozone Monitoring Instrument; OMPS, Ozone Mapping and Profiler Suite; SAGE, Stratospheric Aerosol and Gas Experiment.

parameters, including heat flux, gas and ash emissions, and deformation ( Table 1.2 ). Thermal infrared data are used to detect eruption onset and cessation, calculate lava effusion rates, map lava flows, and estimate ash column heights during explosive eruptions. In some cases, satellites may capture thermal precursors to eruptions, although low-temperature phenomena are challenging to detect. Both high-temporal/low-spatial-resolution (geostationary orbit) and high-spatial/low-temporal-resolution (polar orbit) thermal infrared observations are needed for global volcano monitoring.

Satellite-borne sensors are particularly effective for observing the emission and dispersion of volcanic gas and ash plumes in the atmosphere. Although several volcanic gas species can be detected from space (including SO 2 , BrO, OClO, H 2 S, HCl, and CO; Carn et al., 2016 ), SO 2 is the most readily measured, and it is also responsible for much of the impact of eruptions on climate. Satellite measurements of SO 2 are valuable for detecting eruptions, estimating global volcanic fluxes and recycling of other volatile species, and tracking volcanic clouds that may be hazardous to aviation in near real time. Volcanic ash cloud altitude is most accurately determined by spaceborne lidar, although spatial coverage is limited. Techniques for measuring volcanic CO 2 from space are under development and could lead to earlier detection of preeruptive volcanic degassing.

Interferometric synthetic aperture radar (InSAR) enables global-scale background monitoring of volcano deformation ( Figure 1.7 ). InSAR provides much higher spatial resolution than GPS, but lower accuracy and temporal resolution. However, orbit repeat times will diminish as more InSAR missions are launched, such as the European Space Agency’s recently deployed Sentinel-1 satellite and the NASA–Indian Space Research Organisation synthetic aperture radar mission planned for launch in 2020.

1.5 ERUPTION BEHAVIOR

Eruptions range from violently explosive to gently effusive, from short lived (hours to days) to persistent over decades or centuries, from sustained to intermittent, and from steady to unsteady ( Siebert et al., 2015 ). Eruptions may initiate from processes within the magmatic system ( Section 1.3 ) or be triggered by processes and properties external to the volcano, such as precipitation, landslides, and earthquakes. The eruption behavior of a volcano may change over time. No classification scheme captures this full diversity of behaviors (see Bonadonna et al., 2016 ), but some common schemes to describe the style, magnitude, and intensity of eruptions are summarized below.

Eruption Magnitude and Intensity

The size of eruptions is usually described in terms of total erupted mass (or volume), often referred to as magnitude, and mass eruption rate, often referred to as intensity. Pyle (2015) quantified magnitude and eruption intensity as follows:

magnitude = log 10 (mass, in kg) – 7, and

intensity = log 10 (mass eruption rate, in kg/s) + 3.

The Volcano Explosivity Index (VEI) introduced by Newhall and Self (1982) assigns eruptions to a VEI class based primarily on measures of either magnitude (erupted mass or volume) or intensity (mass eruption rate and/or eruption plume height), with more weight given to magnitude. The VEI classes are summarized in Figure 1.8 . The VEI classification is still in use, despite its many limitations, such as its reliance on only a few types of measurements and its poor fit for small to moderate eruptions (see Bonadonna et al., 2016 ).

Smaller VEI events are relatively common, whereas larger VEI events are exponentially less frequent ( Siebert et al., 2015 ). For example, on average about three VEI 3 eruptions occur each year, whereas there is a 5 percent chance of a VEI 5 eruption and a 0.2 percent chance of a VEI 7 (e.g., Crater Lake, Oregon) event in any year.

Eruption Style

The style of an eruption encompasses factors such as eruption duration and steadiness, magnitude, gas flux, fountain or column height, and involvement of magma and/or external source of water (phreatic and phreatomagmatic eruptions). Eruptions are first divided into effusive (lava producing) and explosive (pyroclast producing) styles, although individual eruptions can be simultaneously effusive and weakly explosive, and can pass rapidly and repeatedly between eruption styles. Explosive eruptions are further subdivided into styles that are sustained on time scales of hours to days and styles that are short lived ( Table 1.3 ).

Classification of eruption style is often qualitative and based on historical accounts of characteristic eruptions from type-volcanoes. However, many type-volcanoes exhibit a range of eruption styles over time (e.g., progressing between Strombolian, Vulcanian, and Plinian behavior; see Fee et al., 2010 ), which has given rise to terms such as subplinian or violent Strombolian.

1.6 ERUPTION HAZARDS

Eruption hazards are diverse ( Figure 1.9 ) and may extend more than thousands of kilometers from an active volcano. From the perspective of risk and impact, it is useful to distinguish between near-source and distal hazards. Near-source hazards are far more unpredictable than distal hazards.

Near-source hazards include those that are airborne, such as tephra fallout, volcanic gases, and volcanic projectiles, and those that are transported laterally on or near the ground surface, such as pyroclastic density currents, lava flows, and lahars. Pyroclastic density currents are hot volcanic flows containing mixtures of gas and micron- to meter-sized volcanic particles. They can travel at velocities exceeding 100 km per hour. The heat combined with the high density of material within these flows obliterates objects in their path, making them the most destructive of volcanic hazards. Lava flows also destroy everything in their path, but usually move slowly enough to allow people to get out of the way. Lahars are mixtures of volcanic debris, sediment, and water that can travel many tens of kilometers along valleys and river channels. They may be triggered during an eruption by interaction between volcanic prod-

TABLE 1.3 Characteristics of Different Eruption Styles

ucts and snow, ice, rain, or groundwater. Lahars can be more devastating than the eruption itself. Ballistic blocks are large projectiles that typically fall within 1–5 km from vents.

The largest eruptions create distal hazards. Explosive eruptions produce plumes that are capable of dispersing ash hundreds to thousands of kilometers from the volcano. The thickness of ash deposited depends on the intensity and duration of the eruption and the wind direction. Airborne ash and ash fall are the most severe distal hazards and are likely to affect many more people than near-source hazards. They cause respiratory problems and roof collapse, and also affect transport networks and infrastructure needed to support emergency response. Volcanic ash is a serious risk to air traffic. Several jets fully loaded with passengers have temporarily lost power on all engines after encountering dilute ash clouds (e.g., Guffanti et al., 2010 ). Large lava flows, such as the 1783 Laki eruption in Iceland, emit volcanic gases that create respiratory problems and acidic rain more than 1,000 km from the eruption. Observed impacts of basaltic eruptions in Hawaii and Iceland include regional volcanic haze (“vog”) and acid rain that affect both agriculture and human health (e.g., Thordarson and Self, 2003 ) and fluorine can contaminate grazing land and water supplies (e.g., Cronin et al., 2003 ). Diffuse degassing of CO 2 can lead to deadly concentrations with fatal consequences such as occurred at Mammoth Lakes, California, or cause lakes to erupt, leading to massive CO 2 releases that suffocate people (e.g., Lake Nyos, Cameroon).

Secondary hazards can be more devastating than the initial eruption. Examples include lahars initiated by storms, earthquakes, landslides, and tsunamis from eruptions or flank collapse; volcanic ash remobilized by wind to affect human health and aviation for extended periods of time; and flooding because rain can no longer infiltrate the ground.

1.7 MODELING VOLCANIC ERUPTIONS

Volcanic processes are governed by the laws of mass, momentum, and energy conservation. It is possible to develop models for magmatic and volcanic phenomena based on these laws, given sufficient information on mechanical and thermodynamic properties of the different components and how they interact with each other. Models are being developed for all processes in volcanic systems, including melt transport in the mantle, the evolution of magma bodies within the crust, the ascent of magmas to the surface, and the fate of magma that erupts effusively or explosively.

A central challenge for developing models is that volcanic eruptions are complex multiphase and multicomponent systems that involve interacting processes over a wide range of length and time scales. For example, during storage and ascent, the composition, temperature, and physical properties of magma and host rocks evolve. Bubbles and crystals nucleate and grow in this magma and, in turn, greatly influence the properties of the magmas and lavas. In explosive eruptions, magma fragmentation creates a hot mixture of gas and particles with a wide range of sizes and densities. Magma also interacts with its surroundings: the deformable rocks that surround the magma chamber and conduit, the potentially volatile groundwater and surface water, a changing landscape over which pyroclastic density currents and lava flows travel, and the atmosphere through which eruption columns rise.

Models for volcanic phenomena that involve a small number of processes and that are relatively amenable to direct observation, such as volcanic plumes, are relatively straightforward to develop and test. In contrast, phenomena that occur underground are more difficult to model because there are more interacting processes. In those cases, direct validation is much more challenging and in many cases impossible. Forecasting ash dispersal using plume models is more straightforward and testable than forecasting the onset, duration, and style of eruption using models that seek to explain geophysical and geochemical precursors. In all cases, however, the use of even imperfect models helps improve the understanding of volcanic systems.

Modeling approaches can be divided into three categories:

• Reduced models make simplifying assumptions about dynamics, heat transfer, and geometry to develop first-order explanations for key properties and processes, such as the velocity of lava flows and pyroclastic density currents, the height of eruption columns, the magma chamber size and depth, the dispersal of tephra, and the ascent of magma in conduits. Well-calibrated or tested reduced models offer a straightforward ap-

proach for combining observations and models in real time in an operational setting (e.g., ash dispersal forecasting for aviation safety). Models may not need to be complex if they capture the most important processes, although simplifications require testing against more comprehensive models and observations.

• Multiphase and multiphysics models improve scientific understanding of complex processes by invoking fewer assumptions and idealizations than reduced models ( Figure 1.10 ), but at the expense of increased complexity and computational demands. They also require additional components, such as a model for how magma in magma chambers and conduits deforms when stressed; a model for turbulence in pyroclastic density currents and plumes; terms that describe the thermal and mechanical exchange among gases, crystals, and particles; and a description of ash aggregation in eruption columns. A central challenge for multiphysics models is integrating small-scale processes with large-scale dynamics. Many of the models used in volcano science build on understanding developed in other science and engineering fields and for other ap-

plications. Multiphysics and multiscale models benefit from rapidly expanding computational capabilities.

• Laboratory experiments simulate processes for which the geometry and physical and thermal processes and properties can be scaled ( Mader et al., 2004 ). Such experiments provide insights on fundamental processes, such as crystal dynamics in flowing magmas, entrainment in eruption columns, propagation of dikes, and sedimentation from pyroclastic density currents ( Figure 1.11 ). Experiments have also been used successfully to develop the subsystem models used in numerical simulations, and to validate computer simulations for known inputs and properties.

The great diversity of existing models reflects to a large extent the many interacting processes that operate in volcanic eruptions and the corresponding simplifying assumptions currently required to construct such models. The challenge in developing models is often highlighted in discrepancies between models and observations of natural systems. Nevertheless, eruption models reveal essential processes governing volcanic eruptions, and they provide a basis for interpreting measurements from prehistoric and active eruptions and for closing observational gaps. Mathematical models offer a guide for what observations will be most useful. They may also be used to make quantitative and testable predictions, supporting forecasting and hazard assessment.

Volcanic eruptions are common, with more than 50 volcanic eruptions in the United States alone in the past 31 years. These eruptions can have devastating economic and social consequences, even at great distances from the volcano. Fortunately many eruptions are preceded by unrest that can be detected using ground, airborne, and spaceborne instruments. Data from these instruments, combined with basic understanding of how volcanoes work, form the basis for forecasting eruptions—where, when, how big, how long, and the consequences.

Accurate forecasts of the likelihood and magnitude of an eruption in a specified timeframe are rooted in a scientific understanding of the processes that govern the storage, ascent, and eruption of magma. Yet our understanding of volcanic systems is incomplete and biased by the limited number of volcanoes and eruption styles observed with advanced instrumentation. Volcanic Eruptions and Their Repose, Unrest, Precursors, and Timing identifies key science questions, research and observation priorities, and approaches for building a volcano science community capable of tackling them. This report presents goals for making major advances in volcano science.

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Volcano Writing Prompts

These volcano writing prompts will provide your students with creative writing practice.

You can share these volcano writing prompts with your students.

They are written to get your students to recall what they have learned while creating a short story.

This is another free resource for teachers and home school families from The Curriculum Corner.

Volcano writing prompts

• Write a story about a group of explorers who stumble upon an undiscovered volcano. Describe the eruption and the explorers’ reaction to it.
• Imagine that you are a volcano that has just woken up after hundreds of years of dormancy. Write a first-person narrative describing your thoughts and feelings as you prepare to erupt.
• Write a letter to a friend describing the effects of a volcanic eruption on a nearby town. Use sensory language to vividly describe the sights, sounds, and smells of the aftermath.
• Create a dialogue between a group of scientists studying a volcano and a local resident who is skeptical of their findings. Use evidence and reasoning to convince the resident that the volcano poses a threat.
• Write a poem about the beauty and danger of volcanoes. Use imagery and figurative language to convey the power and majesty of these natural wonders.
• Write a diary entry from the perspective of a person living in a village that is in the path of a lava flow. Describe their feelings and actions as they try to evacuate and save their belongings.
• Write a news article about a volcanic eruption that recently occurred in a nearby town. Include quotes from eyewitnesses, local officials, and experts to provide a well-rounded account of the event.
• Create a persuasive essay arguing for or against the construction of a new hotel near a volcanic site. Consider the economic benefits, environmental impact, and potential risks involved.
• Imagine that you are a scientist studying a dormant volcano. Write a report explaining the signs that indicate that the volcano may become active soon, and what precautions should be taken.
• Write a short story from the point of view of a volcano. Describe the process of building up pressure and erupting, and how the volcano affects the landscape and the creatures around it.

You can download a printable version of these prompts by clicking on the green apples below. The first two pages contain the prompts on strips so that you can print and have students choose one. The last page contains a list of the prompts. Students can be given the whole page. Or, you can display the page on your screen.

As with all of our resources, The Curriculum Corner creates these for free classroom use. Our products may not be sold. You may print and copy for your personal classroom use. These are also great for home school families!

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Home — Essay Samples — Environment — Volcano — Exploring Volcanoes: From Formation to Societal Resilience

Exploring Volcanoes: from Formation to Societal Resilience

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Updated: 29 March, 2024

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Introduction, volcano essay [100 words], volcano essay [150 words], volcano essay [200 words].

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ENCYCLOPEDIC ENTRY

A volcano is an opening in a planet or moon’s crust through which molten rock and gases trapped under the surface erupt, often forming a hill or mountain.

Volcanic eruption

Volcanic eruptions can create colorful and dramatic displays, such as this eruption of this volcano in the Virunga Moutains of the Democratic Republic of the Congo.

Photograph by Chris Johns

A volcano is an opening in a planet or moon’s crust through which molten rock, hot gases, and other materials erupt . Volcanoes often form a hill or mountain as layers of rock and ash build up from repeated eruptions .

Volcanoes are classified as active, dormant, or extinct. Active volcanoes have a recent history of eruptions ; they are likely to erupt again. Dormant volcanoes have not erupted for a very long time but may erupt at a future time. Extinct volcanoes are not expected to erupt in the future.

Inside an active volcano is a chamber in which molten rock, called magma , collects. Pressure builds up inside the magma chamber, causing the magma to move through channels in the rock and escape onto the planet’s surface. Once it flows onto the surface the magma is known as lava .

Some volcanic eruptions are explosive, while others occur as a slow lava flow. Eruptions can occur through a main opening at the top of the volcano or through vents that form on the sides. The rate and intensity of eruptions, as well as the composition of the magma, determine the shape of the volcano.

Volcanoes are found on both land and the ocean floor. When volcanoes erupt on the ocean floor, they often create underwater mountains and mountain ranges as the released lava cools and hardens. Volcanoes on the ocean floor become islands when the mountains become so large they rise above the surface of the ocean.

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Essay on volcanoes | geology.

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After reading this article you will learn about:- 1. Introduction to Volcanoes 2. Volcano Formation 3. Volcanic Landforms 4. Major Gases Emitted by Volcanoes 5. Lightning and Whirlwinds 6. Features Produced by the Escape of Gases from Volcanic Lavas 7. Volcanic Products 8. Source of the Explosive Energy 9. Classification of Pyroclastics 10. Lahars-Mudflows on Active and Inactive Cones and Other Details.

Essay Contents:

• Essay on the Volcanoes and Atmospheric Pollution

Essay # 1. Introduction to Volcanoes :

A volcano is a cone shaped hill or mountain which is built-up around an opening in the earth’s surface through which hot gases, rock fragments and lavas are ejected.

Due to the accumulation of the solid fragments around the conduit a conical mass is built which increases in size to become a large volcanic mountain. The conical mass so built-up is called a volcano. However the term volcano is taken to include not only the central vent in the earth but also the mountain or hill built around it.

Volcanoes are in varying sizes, varying from small conical hills to loftiest mountains on the earth’s surface. The volcanoes of the Hawaiian Islands are nearly 4300 metres above sea level since they are built over the floor of the Pacific ocean which at the site is 4300 to 5500 metres deep, the total height of the volcano may be about 9000 m or more.

The very high peaks in the Andes, in the Cascade Range of the Western United States, Mt. Baker, Mt. Adams, Mt. Hood etc. are all volcanoes which have now become extinct. Over 8000 independent eruptions have been identified from earth’s volcanoes. There are many inaccessible regions and ocean floors where volcanoes have occurred undocumented or unnoticed.

The eruption of a volcano is generally preceded by earthquakes and by loud rumblings like thunder which may continue on a very high scale during the eruption. The loud rumblings are due to explosive movement of gases and molten rock which are held under very high pressure. Before eruption of a volcano fissures are likely to be opened, nearby lakes likely to be drained and hot springs may appear at places.

The eruptive activity of volcanoes is mostly named after the well-known volcanoes, which are known for particular type of behaviour, like Strambolian, Vulcanian, Vesuvian, Hawaiian types of eruption. Volcanoes may erupt in one distinct way or may erupt in many ways, but, the reality is, these eruptions provide a magical view inside the earth’s molten interior.

The nature of a volcanic eruption is determined largely by the type of materials ejected from the vent of the volcano. Volcanic eruptions may be effusive (fluid lavas) or dangerous and explosive with blasts of rock, gas, ash and other pyroclasts.

Some volcanoes erupt for just a few minutes while some volcanoes spew their products for a decade or more. Between these two main types viz. effusive and explosive eruptions, there are many subdivisions like, eruption of gases mixed with gritty pulverised rock forming tall dark ash clouds seen for many kilometres, flank fissure eruptions with lava oozing from long horizontal cracks on the side of a volcano.

There is also the ground hugging lethally hot avalanches of volcanic debris called pyroclastic flows. When magma rises, it may encounter groundwater causing enormous phreatic, i.e., steam eruptions. Eruptions may also release suffocating gases into the atmosphere. Eruptions may produce tsunamis and floods and may trigger earthquakes. They may unleash ravaging rockslides and mudflows.

Volcanoes which have had no eruptions during historic times, but may still show fairly fresh signs of activity and have been active in geologically recent times are said to be dormant. There are also volcanoes which were formerly active but are of declining activity a few of which may be emitting only steam and other gases.

Geysers are hot springs from which water is expelled vigorously at intervals and are characteristics of regions of declining volcanic activity. Geysers are situated in Iceland, the Yellowstone park in USA and in New Zealand.

In contrast to the explosive type of volcanoes, there exist eruptions of great lava flows quietly pouring out of fissures developed on the earth’s surface. These eruptions are not accompanied by explosive outbursts. These are fissure eruptions.

Ex: Deccan Trap formations in India. The lavas in these cases are mostly readily mobile and flow over low slopes. The individual flows are seldom over a few meters in thickness; the average thickness may be less than 15 meters. If the fissure eruptions have taken place in valleys however, the thickness may be much greater.

A noteworthy type of volcano is part of the world encircling mid-ocean ridge (MOR) visible in Iceland. The MOR is really a single, extremely long, active, linear volcano, connecting all spreading plate boundaries through all oceans. Along its length small, separate volcanoes occur. The MOR exudes low-silica, highly fluid basalt producing the entire ocean floor and constituting the largest single structure on the face of the earth.

Essay # 2. Location of Volcanoes:

Volcanoes are widely distributed over the earth, but they are more abundant in certain belts. One such belt encircles the Pacific ocean and includes many of the islands in it. Other volcanic areas are the island of West Indies, those of the West coast of Africa, the Mediterranean region and Iceland.

Most volcanoes occur around or near the margins of the continents and so these areas re regarded as weak zones of the earth’s crust where lavas can readily work their way upward. There are over 400 active volcanoes and many more inactive ones. Numerous submarine volcanoes also exist.

Since it is not possible to examine the magma reservoir which fees a volcano our information must be obtained by studying the material ejected by the volcano. This material consists of three kinds of products, viz. liquid lava, fragmented pyroclasts and gases. There may exist a special problem in studying the gases, both in collecting them under hazardous conditions or impossible conditions.

It may also be difficult to ascertain that the gases collected are true volcanic gases and are not contaminated with atmospheric gases. Investigation of the composition of extruded rock leads to a general, although not very detailed, correlation between composition and intensity of volcanic eruption.

In general, the quite eruptions are characteristic of those volcanoes which emit basic or basaltic lavas, whereas the violent eruptions are characteristic of volcanoes emitting more silicic rocks.

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Essay # 3 . formation of volcanoes :.

The term volcano is used to mean both the opening in the earth’s crust, i.e. the vent through which the eruption of magma occurs as well as the hill built- up by the erupted material. Volcanoes occur where the cracks in the earth’s crust lead to the magma chamber.

The liquid magma which is lighter than the surrounding rocks is under high pressure is pushed up towards the surface through these cracks. In this process the gases dissolved in the magma which expand are released providing an upward push to the magma.

As the magma gets closer to the surface, due to the reducing confining pressure to overcome, the magma and the gases flow faster. The magma, depending on its viscosity may quietly pour to the surface in the form of a flood of molten rock or it may explosively spurt out the molten rock to considerable heights as showers on the surrounding region with solid rock fragments and globs of molten rock. The liquid magma discharged to the surface is called lava.

Essay # 4 . Volcanic Landforms :

Many surface features of volcanic origin are created. These features range from towering peaks and huge lava sheets to small and low craters. The features created by a volcano vary depending on the type of eruption, the material erupted and the effects of erosion.

Four types of volcanic landforms are formed:

i. Ash and Cinder Cones or Explosion Cones:

These appear where explosive eruptions take place. When very hot solid fragments from a central crater (or a subsidiary crater) are ejected. A concave cone of height not exceeding 300 m is formed.

ii. Lava Cones:

These are formed from slowly upwelling lava.

These are of two types:

(a) Steep Sided Volcanoes:

These are formed from sticky acid lava which gets hardened quickly. The highly viscous lava which is squeezed out makes spines like tower.

(b) Shield Volcanoes:

These show gently sloping dome features. These are formed from runny lava which flows long distances, before getting hardened.

iii. Composite Cones or Strato-Volcanoes or Strato Cones:

These volcanoes have concave cone shaped sides of alternating ash and lava layers. These are common in most very high volcanoes. In some cases solid lava may plug the main pipe to the crater. Then pent up gases may blast the top off.

When the magma chamber empties, the summit of the volcano collapses. As a consequence, the feature produced is a vast shallow cavity called a Caldera. Strato volcanoes are the accumulated products of many volcanoes. Chemically most of these products are andesite. Some are dacite and a few are basalt and rhyolite. Due to this chemical mix and characteristic interlayering of lava flows, this volcano is called strato volcano.

iv. Shield Volcanoes:

When a volcano vent produces many successive basaltic lava flows stacked one on top of another in eruptive order, the resulting landform is called a shield volcano. A cinder cone and its associated lava flow can be thought of as the initial building blocks of a shield volcano.

A cinder cone is monogenetic because it forms from a single short-lived eruption (of a few years to a decade or two in duration). In contrast, a shield volcano that is an accumulation of the products of many eruptions over a period of say thousands to hundreds of thousands of years is polygenic.

On land these volcanoes have low angle cones. When they form under water they start with a steeper shape because the lava freezes much faster and does not travel far. The shape fattens to the shield form as the cone builds above the sea level.

v. Plateau Basalts or Lava Plains:

These form the bulk of many volcanic fields. These are features which occur where successive flows of basic lava leaks through fissures, over land surface and then cools and hardens forming a blanket-like feature.

The surface appearance of a flow provides information on the composition and temperature of the magma before it solidified. Very hot low viscosity basalt flows far and fast and produces smooth ropy surfaces. Cooler and less-fluid basalt flows form irregular, jagged surfaces littered with blocks.

The lava flows have blanketed to about 2000 m thickness covering 6,50,000 sq.km. in the Indian Deccan Plateau. Such lava flows have also created the U.S. Columbia River Plateau, the Abyssinian Plateau, the Panama Plateau of South America and the Antrim Plateau of Northern Ireland.

Magmas like dacite and rhyolite that have high silica contents are cooler and more viscous than basalt and hence they do not flow far resulting in the features, lobes, pancakes and domes. Domes often plug up the vent from which they issued, sometimes creating catastrophic explosions and may create a crater.

Eroded volcanoes have their importance. They give us a glimpse of the interior plumbing along which the magma rose to the surface. At the end of an eruption, magma solidifies in the conduits along which it had been rising. The rock so formed is more resistant than the shattered rock forming the walls and hence these lava filled conduits are often left behind when the rest of the volcano has been eroded away.

The filling of the central vertical vent is somewhat circular in section and forms a spire called a neck. The filling of cracks along which lava rose forms nearly vertical tabular bodies called dikes. Sometimes magma works its way along cracks that are nearly horizontal, often along bedding planes of sedimentary rocks. This results in the formation of table-like bodies called sills.

Essay # 5 . Major Gases Emitted by Volcanoes :

Volcanic gases present within the magma are released as they reach the earth’s surface, escaping at the major volcanic opening or from fissures and vents along the side of the volcano. The most prevalent gases emitted are steam, carbon dioxide and hydrogen sulphide. Carbon dioxide is an invisible, odourless poisonous gas. The table below shows the gases emitted from volcanoes.

Essay # 6 . Lightning and Whirlwinds :

Lightning flashes accompany most volcanic eruptions, especially those involving dust. The cause of this lightning is believed to be either contact of sea water with magma or generation of static electricity by friction between colliding particles carried in the erupting gases. Lightning is characteristic of vulcanian eruptions and is common during glowing avalanches.

Whirlwinds are seen during many volcanic eruptions. They are seen above hot lavas. Sometimes they form inverted cones extending a little below the eruption cloud. Energy for the whirlwinds might be from the hot gases and lava, high velocity gas jets in the eruption, heat released into the atmosphere during falls of hot tephra or where lava flows into the sea creating steam.

Essay # 7 . Features Produced by the Escape of Gases from Volcanic Lavas :

The gases of volcanic lavas produce several interesting features while they escape. They expand in the lava of the flow and thus cause the formation of Scoriaceous and Pumiceous rocks. By their explosion, they blow the hardened lava above them in the conduit, into bits and thus produce pyroclastic material.

They form clouds above volcanoes, the rain from which assists in the production of mud flows. When the volcano becomes inactive, they escape aiding in the formation of jumaroles, geysers and hot springs. Scoriaceous rocks are extremely porous. They are formed by the expansion of the steam and other gases beneath the hardened crust of a lava. The final escape of the gases from the hardening lava leaves large rounded holes in the rock.

Pumice is a rock also formed by the expansion and escape of gases. In pumice, many of the holes are in the form of long, minute, closed tubes which make the rock so light that it will float on water.

These tubes are formed by the expansive force of large amounts of gases in an extremely viscous lava that cools very rapidly, forming a glassy rock. Pumice is the rock that is usually formed from the lava ejected from explosive volcanoes. It can be blown to kilometres by explosions.

Essay # 8 . Volcanic Products :

Volcanoes give out products in all the states of matter – gases, liquids and solids.

Steam, hydrogen, sulphur and carbon dioxide are discharged as gases by a volcano. The steam let out by a volcano condenses in the air forming clouds which shed heavy rains. Various gases interact and intensify the heat of the erupting lavas. Explosive eruptions cause burning clouds of gas with scraps of glowing lava called nuees ardentes.

The main volcanic product is liquid lava. Sticky acid lava on cooling, solidifies and hardens before flowing long distances. Such lava can also block a vent resulting in pressure build-up which was relieved by an explosion. Basic fluid lava of lesser viscosity flows to great distances before hardening.

Some lava forms are produced by varying conditions as follows. Clinkery block shaped features are produced when gas spurted from sluggish molten rock capped by cooling crust. These are called Aa.

Pahoehoe is a feature which has a wrinkled skin appearance caused by molten lava flowing below it.

Pillow lava is a feature resembling pillows. This feature piles up when fast cooling lava erupts under water.

Products in explosive outbursts are called Pyroclasts. These consist of either fresh material or ejected scraps of old hard lava and other rock. Volcanic bombs include pancake-flat scoria shaped on impacting the ground and spindle bombs which are twisted at ends as they whizzle through the air. Acid lava full of gas formed cavities produces a light volcanic rock.

Pumice which is so light it can float on water. The product Ignimbrite shows welded glassy fragments. Lapilli are hurled out cinder fragments. Vast clouds of dust or very tiny lava particles are called volcanic ash. Volcanic ash mixed with heavy rain creates mudflows.

Sometimes mudflows can bury large areas of land. Powerful explosions can smoother land for many kilometres around with ash and can hurl huge amount of dust into the higher atmosphere. Violent explosions destroy farms and towns, but volcanic ash provides rich soil for crops.

i. Hot springs:

The underground hot rocks heat the spring waters creating hot springs. The hot springs shed minerals dissolved in them resulting in crusts of calcium carbonate and quartz (geyserite).

ii. Smoker:

This is a submarine hot spring at an oceanic spreading ridge. This submarine spring emits sulphides and builds smoky clouds.

iii. Geyser:

Periodically steam and hot water are forced up from a vent by super-heated water in pipe like passage deep down. Famous geysers are present in Iceland and Yellowstone National Park.

iv. Mud volcano:

This is a low mud cone deposited by mud-rich water gushing out of a vent.

v. Solfatara:

This is a volcanic vent which emits steam and sulphurous gas.

vi. Fumarole:

This is a vent which emits steam jets as at Mt. Etna, Sicily and Valley of Ten Thousand smokes in Alaska.

vii. Mofette:

This is a small vent which emits gases including carbon dioxide. These occur in France, Italy and Java.

Various terms used while describing volcanic features are given below:

i. Magma Chamber:

Magma is created below the surface of the earth (at depth of about 60 km) and is held in the magma chamber until sufficient pressure is built-up to push the magma towards the surface.

This is a pipe like passage through which the magma is pushed up from the magma chamber.

This is the outlet end of the pipe. Magma exits out of the vent. If a vent erupts only gases, it is called fumarole.

iv. Crater:

Generally the vent opens out to a depression called crater at the top of the volcano. This is caused due to the collapse of the surface materials.

v. Caldera:

This is a very big crater formed when the top of an entire volcanic hill collapses inward.

When the erupted materials cover the vent, a volcanic dome is created covering the vent. Later as the pressure of gas and magma rises, another eruption occurs shattering the dome.

A mountain-like structure created over thousands of years as the volcanic lava, ash, rock fragments are poured out onto the surface. This feature is called volcanic cone.

viii. Pyroclastic Flow :

A pyroclastic flow (also known as nuee ardentes (French word) is a ground hugging, turbulent avalanche of hot ash. pumice, rock fragments, crystals, glass shards and volcanic gas. These flows can rush down the steep slopes of a volcano at 80 to 160 km/li, burning everything in their path.

Temperatures of these flows can reach over 500°C. A deposit of this mixture is also often referred to as pyroclastic flow. An even more energetic and dilute mixture of searing volcanic gases and rock-fragments is called a pyroclastic surge which can easily ride up and over ridges.

ix. Seamounts :

A spectacular underwater volcanic feature is a huge localized volcano called a seamount. These isolated underwater volcanic mountains rise from 900 m to 3000 m above the ocean floor, but typically are not high enough to poke above the water surface.

Seamounts are present in all the oceans of the world, with the Pacific ocean having the highest concentration. More than 2000 seamounts have been identified in this ocean. The Gulf of Alaska also has many seamounts. The Axial Seamount is an active volcano off the north coast of Oregon (currently rises about 1400 m above the ocean floor, but its peak is still about 1200 m below the water surface.

Essay # 9 . Source of the Explosive Energy :

The energy for the explosive violence comes from the expansion of the volatile constituents present in the magma, the gas content of which determines the degree of commination of the materials and the explosive violence of the eruption.

This energy is expanded in two ways, firstly in the expulsion of the materials into the atmosphere and secondly, due to expansion within the magma leading to the development of vesicles. The most important gas is steam, which may form between 60 to 90 per cent of the total gas content in a lava. Carbon dioxide, nitrogen and sulphur dioxide occur commonly and hydrogen, carbon monoxide, sulphur and chlorine are also present.

Essay # 10 . Classification of Pyroclastics :

Pyroclastics refer to fragmental material erupted by a volcano. The larger fragments consisting of pieces of crystal layers beneath the volcano or of older lavas broken from the walls of the conduit or from the surface of the crater are called blocks.

Volcanic bombs are masses of new lava blown from the crater and solidified during flight, becoming round or spindle shaped as they are hurled through the air. They may range in size from small pellets up to huge masses weighing many kilonewtons.

Sometimes they are still plastic when they strike the surface and are flattened or distorted as they roll down the side of the cone. Another type called bread crust bomb resembles a loaf of bread with large gaping cracks in the crust.

This cracking of the crust results from the continued expansion of the internal gases. Many fragments of lava and scoria solidified in flight drop back into the crater and are intermixed with the fluid lava and are again erupted.

In contrast to bombs, smaller broken fragments are lapilli (from Italian meaning, little stones) about the size of walnuts; then in decreasing size, cinders, ash and dust. The cinders and ash are pulverized lava, broken up by the force of rapidly expanding gases in them or by the grinding together of the fragments in the crater, as they are repeatedly blown out and dropped back into the crater after each explosion.

Pumice is a type of pyroclastic produced by acidic lavas if the gas content is so great as to cause the magma to froth as it rises in the chimney of the volcano. When the expansion occurs the rock from the froth is expelled as pumice. Pumice is of size ranging from the size of a marble to 30 cm or more in diameter. Pumice will float in water due to many air spaces formed by the expanding gases.

Lava fountains in which steam jets blow the lava into the air produce a material known as Pele’s hair which is identical with rock wool which is manufactured by blowing a jet of steam into a stream of molten rock (Rock wool is used for many types of insulation).

Coarse angular fragments become cemented to form a rock called volcanic breccia. The finer material like cinders and ash forms thick deposits which get consolidated through the percolation of ground water and is called tuff. Tuff is a building stone used in the volcanic regions. It is soft and easily quarried and can be shaped and has enough strength to be set into walls with mortar.

i. Agglomerate:

The debris in and around the vent contains the largest ejected masses of lava bombs which are embedded in dust and ash. A deposit of this kind is known as agglomerate. The layers of ash and dust which are formed for some distance around the volcano and which builds its cone, become hardened into rocks which are called tuffs.

Ash includes all materials with size less than 4 mm. It is pulverized lava, in which the fragments are often sharply angular and formed of volcanic glass; these angular and often curved fragments are called shards.

Since the gas content of ash on expulsion is high it has considerable mobility on reaching the surface; it is also hot and plastic, the result of these conditions being that the fragments often become welded together. The finest of ash is so light that wind can transport it for great distances.

The table below sets out a general classification of pyroclastic rocks based on the particle size of the fragments forming the rocks.

The chart in Fig. 15.3 summarizes the names of the common magmas and their associated ranges in silica. A very important property of magma that determines the eruption style and the eventual shape of the volcano it builds, is its resistance to flow, namely its viscosity.

Magma viscosity increases as its silica content increases. Eruptions of highly viscous magmas are violent. The highly viscous rhyolite magma piles up its ticky masses right over its eruptive vent to farm tall steep sided volcanoes.

On the contrary the basaltic magma flows great distances from its eruptive vent to from low, broad volcanic features. Magma in the intermediate viscosity spectrum say the andesite magma tends to form volcanoes of profile shapes between these two extremes.

An additional important ingredient of magma is water. Magmas also contain carbon dioxide and various sulphur-containing gases in solution. These substances are considered volatile since they tend to occur as gases at temperatures and pressures at the surface of the earth.

As basaltic magma changes composition toward rhyolite the volatiles become concentrated in the silica-rich magma. Presence of these volatiles (mainly water) in high concentration produces highly explosive volcanoes. It should be noted that these volatiles are held in magma by confining pressure. Within the earth, the confining pressure is provided by the load of the overlying rocks.

As the magma rises from the mantle to depths about 1.5 km or somewhat less, the rock load is reduced to that extent that the volatiles (mainly water) start to boil. Bubbles rising through highly viscous rhyolitic magma have such difficulty to escape their way, that many carry blobs of magma and fine bits of rock with them and they finally break free and jet violently upward resulting in a violent buoyant eruption column that can rise to kilometres above the earth.

The fine volcanic debris in such a powerful eruption gets dispersed within the upper atmosphere, hide the sunlight affecting the weather. The greater the original gas concentration in a magma and the greater the volume rate of magma leaving the vent, the taller is the eruption column produced.

The gases escaping from magma during eruption mix with the atmosphere and become part of the air humans, animals and plants breath and assimilate. However as magma cools and solidifies to rock during eruption, some of the gas remains trapped in bubbles creating vesicles. Generally all volcanic rocks contain some gas bubbles. A variety of vesicular rhyolite is pumice. Pumice is vesicular to such an extent, it floats in water.

Essay # 15. Classification of Volcanic Activity:

A classification of volcanic activity based on the type of product is shown in Fig. 15.4. The basic subdivision is based on the proportions of the gas, liquid and solid components, which can be represented on a triangular diagram. The four basic triangles represent the domain of four basic kinds of volcanic activity.

Essay # 16. Cone Topped and Flat Topped Volcanoes:

Generally rhyolite volcanoes are flat-topped because rhyolite magma which is extremely viscous, oozes out of the ground, piles up around the vent and then oozes away a bit to form a pancake shape. In contrast basalt volcanoes generally feed lava flows that flow far from the vent, building a cone.

Basaltic tephra (large particles of different size) is a spongy-looking black, rough material of pebble or cobble. Commercially this tephra is known as cinder and is used for gardening and rail-road beds. In some situations basaltic volcanoes develop flat top profile.

Flat topped volcanoes of basalt can form when there is an eruption under a glacier. Instead of getting ejected as tephra to form a cone, it forms a cauldron of lava surrounded by ice and water and eventually solidifying. When the ice melts, a steep-sided, table-shaped mountain known as a tuya remains. Volcanoes of this type are common in Iceland and British Columbia, where volcanoes have repeatedly erupted under glaciers.

Surprisingly, the Pacific ocean is a home to many flat-topped undersea basaltic mountains. These are called seamounts. How these seamounts were formed was a mystery for a long time. Surveying and dredging operations revealed that most seamounts were formerly conical volcanoes projecting above the water.

Geologists found that the conical volcanoes got lowered due to subsidence and the tops of the volcanoes came near the sea water level and the powerful waves mowed them flat. Continued subsidence caused them to drop below the water surface.

Essay # 17. Types of Volcanoes :

There are many types of volcanoes depending on the composition of magma especially on the relative proportion of water and silica contents. If the magma contains little of either of these, it is more liquid and it flows freely forming a shallow rounded hill.

Large water content with little silica permits the vapour to rapidly rise through the molten rock, throwing fountains of fire high into the air. More silica and less water in the magma make the magma more viscous. Such magma flows slowly and builds-up a high dome.

High content of both water and silica create another condition. In such a case the dense silica prevents the water from vaporizing until it is close to the surface and results in a highly explosive way. Such an eruption is called a Vulcan eruption.

Other types of eruption are named after people or regions associated with them. Vesuvian eruption named after Vesuvius is a highly explosive type occurring after a long period of dormancy. This type ejects a huge column of ash and rock to great heights upto 50 km.

A peleean eruption named after the eruption of Mt. Pelee in Martin que in 1902 is a highly violent eruption ejecting a hot cloud of ash mixed with considerable quantity of gas which flows down the sides of the volcano like a liquid. The cloud is termed nuee ardente meaning glowing cloud. Pyroclastic or ash flow refers to a flow of ash, solid rock pieces and gas. Hawaiian eruptions eject fire fountains.

Essay # 18. Violence of Volcanic Eruptions :

Volcanic activity may be classified by its violence, which in turn is generally related to rock type, the course of eruptive activity and the resulting landforms. We may in general distinguish between lava eruptions associated with basic and intermediate magmas and pumice eruptions associated with acid magmas.

The percentage of the fragmentary material in the total volcanic material produced can be used as a measure of explosiveness and if calculated for a volcanic region can be adopted as an Explosion Index (E), useful for comparing one volcanic region with others. Explosion Index for selected volcanic regions by Rittmann (1962) are shown in the table below.

Newhall and Self (1982) proposed a Volcanic Explosivity Index (VEI) which helps to summarize many aspects of eruption and is shown in the table below.

Essay # 19. Famous Volcanoes around the World :

Many volcanoes are present around the world. Some of the largest and well known volcanoes are listed in the table below.

Essay # 20. Volcanic Hazards :

Volcanic eruptions have caused destruction to life and property. In most cases volcanic hazards cannot be controlled, but their impacts can be mitigated by effective prediction methods.

Flows of lava, pyroclastic activity, emissions of gas and volcanic seismicity are major hazards. These are accompanied with movement of magma and eruptive products of the volcano. There are also other secondary effects of the eruptions which may have long term effects.

In most cases volcanoes let out lava which causes property damage rather than injuries or deaths. For instance, in Hawaii lava flows erupted from Kilauea for over a decade and as a consequence, homes, roads, forests, cars and other vehicles were buried in lavas and in some cases were burned by the resulting fires but no lives were lost. Sometimes it has become possible to control or divert the lava flow by constructing retaining walls or by some provision to chill the front of the lava flow with water.

Lava flows move slowly. But the pyroclastic flows move rapidly and these with lateral blasts may kill lives before they can run away. In 1902, on the island of Martinique the most destructive pyroclastic flow of the century occurred resulting in very large number of deaths.

A glowing avalanche rushed out of the flanks of Mount Pelee, running at a speed of over 160 km/h and killed about 29000 people. In A.D. 79 a large number of people of Pompeii and Herculaneum were buried under the hot pyroclastic material erupted by Mount Vesuvius.

The poisonous gas killed many of the victims and their bodies got later buried by pyroclastic material. In 1986, the eruption of the volcano at Lake Nyos, Cameroon killed over 1700 people and over 3000 cattle.

When magma moves towards the surface of the earth rocks may get fractured and this may result in swarms of earthquakes. The turbulent bubbling and boiling of magma below the earth can produce high frequency seismicity called volcanic tremor.

There are also secondary and tertiary hazards connected with volcanic eruptions. A powerful eruption in a coastal setting can cause a displacement of the seafloor leading to a tsunami. Hazardous effects are caused by pyroclastic material after a volcanic eruption has ceased.

Either melt water from snow or rain at the summit of the volcano can mix with the volcanic ash and start a deadly mud flow (called as lahar). Sometimes a volcanic debris avalanche in which various materials like pyroclastic matter, mud, shattered trees etc. is set out causing damage.

Volcanic eruptions produce other effects too. They can permanently change a landscape. They can block river channels causing flooding and diversion of water flow. Mountain terrains can be severely changed.

Volcanic eruptions can change the chemistry of the atmosphere. The effects of eruption on the atmosphere are precipitation of salty toxic or acidic matter. Spectacular sun set, extended period of darkness and stratospheric ozone depletion are all other effects of eruptions. Blockage of solar radiation by fine pyroclastic material can cause global cooling.

Apart from the above negative effects of volcanisms there are a few positive effects too. Periodic volcanic eruptions replenish the mineral contents of soils making it fertile. Geothermal energy is provided by volcanism. Volcanism is also linked with some type of mineral deposits. Magnificent scenery is provided by some volcanoes.

The study of volcanoes has great scientific as well as social interest. Widespread tephra layers inter-bedded with natural and artificial deposits have been used for deciphering and dating glacial and volcanic sequences, geomorphic features and archeological sites.

For example, ash from Mt. St. Helens Volcano in Washington travelled at least 900 km into Alberta. North American Indians fashioned tools and weapons out of volcanic glass, the origin of which is used to trace migratory and trading routes.

Volcanoes are windows through which the scientists look into the interiors of the earth. From volcanoes we learn the composition of the earth at great depths below the surface. We learn about the history of shifting layers of the earth’s crust. We learn about the processes which transform molten material into solid rock.

From the geological historical view point, volcanic activity was crucial in providing to the earth a unique habitat for life. The degassing of molten materials provided water for the oceans and gases for the atmosphere – indeed, the very ingredients for life and its sustenance.

Essay # 21. Volcanoes and Atmospheric Pollution :

During eruptions volcanoes inject solid particles and gases into the atmosphere. Particles may remain in the atmosphere for months to years and rain back on to the earth. Volcanoes also release chlorine and carbon dioxide.

The main products injected into the atmosphere from volcanic eruptions however are volcanic ash particles and small drops of sulphuric acid in the form of a fine spray known as aerosol. Most chlorine released from volcanoes is in the form of hydrochloric acid which is washed out in the troposphere. Volcanoes also emit carbon dioxide.

During the times of giant volcanic eruptions in the past the amount of carbon dioxide released may have been enough to affect the climate. In general global temperatures are cooler for a year or two after a major eruption.

A large magnitude pyroclastic eruption such as a caldera-forming event can be expected to eject huge volumes of fine ash high into the atmosphere where it may remain for several years, carried around the globe by strong air currents in the upper atmosphere.

The presence of this ash will increase the opacity of the atmosphere, that is, it will reduce the amount of sunlight reaching the earth’s surface. Accordingly, the earth’s surface and climate will become cooler. Various other atmospheric effects may be observed. Particularly noticeable is an increase in the intensity of sunsets.

i. Global Warming :

Besides blocking the rays of the sun, the vast clouds of dust and ash that result from a volcanic eruption can also trap ultraviolet radiation within the atmosphere causing global warming.

Volcanic eruptions usually include emissions of gases such as carbon dioxide which can further enhance this warming. Even if it lasted only for a relatively short time, a sudden increase in temperature could in turn have contributed to extinctions by creating an environment unsuitable for many animals.

ii. Geothermal Energy :

Geothermal energy is the heat energy trapped below the surface of the earth. In all volcanic regions, even thousands of years after activity has ceased the magma continues to cool at a slow rate. The temperature increases with depth below the surface of the earth. The average temperature gradient in the outer crust is about 0.56° C per 30 m of depth.

There are regions however, where the temperature gradient may be as much as 100 times the normal. This high heat flow is often sufficient to affect shallow strata containing water. When the water is so heated such surface manifestations like hot springs, fumaroles, geysers and related phenomena often occur.

It may be noted that over 10 per cent of the earth’s surface manifests very high heat flow and the hot springs and related features which are present in such areas have been used throughout the ages, for bathing, laundry and cooking.

In some places elaborate health spas and recreation areas have been developed around the hot-spring areas. The cooling of magma, even though it is relatively close to the surface is such a slow process that probably in terms of human history, it may be considered to supply a source of heat indefinitely.

Temperatures in the earth rise with increasing depth at about 0.56°C per 30 m depth. Thus if a well is drilled at a place where the average surface temperature is say 15.6°C a temperature of 100°C would be expected at about 4500 m depth. Many wells are drilled in excess of 6000 m and temperatures far above the boiling point of water are encountered.

Thermal energy is stored both in the solid rocks and in water and steam filling the pore spaces and fractures. The water and steam serve to transmit the heat from the rocks to a well and then to the surface.

In a geothermal system water also serves as the medium by which heat is transmitted from a deep igneous source to a geothermal reservoir at a depth shallow enough to be tapped by drilling. Geothermal reservoirs are located in the upward flowing part of a water – convective system. Rainwater percolates underground and reaches a depth where it is heated as it comes into contact with the hot rocks.

On getting heated, the water expands and moves upward in a convective system. If this upward movement is unrestricted the water will be dissipated at the surface as hot springs; but if such upward movement is prevented, trapped by an impervious layer the geothermal energy accumulates, and becomes a geothermal reservoir.

Until recently it was believed that the water in a geothermal system was derived mainly from water given off by the cooling of magma below the surface. Later studies have revealed that most of the water is from surface precipitation, with not more than 5 per cent from the cooling magma.

Production of electric power is the most important application of geothermal energy. A geothermal plant can provide a cheap and reliable supply of electrical energy. Geothermal power is nearly pollution free and there is little resource depletion.

Geothermal power is a significant source of electricity in New Zealand and has been furnishing electricity to parts of Italy. Geothermal installations at the Geysers in northern California have a capacity of 550 megawatts, enough to supply the power needs of the city of San Francisco.

Geothermal energy is versatile. It is being used for domestic heating in Italy, New Zealand and Iceland. Over 70 per cent of Iceland’s population live in houses heated by geothermal energy. Geothermal energy is being used for forced raising of vegetables and flowers in green houses in Iceland where the climate is too harsh to support normal growth. It is used for animal husbandry in Hungary and feeding in Iceland.

Geothermal energy can be used for simple heating processes, drying or distillation in every conceivable fashion, refrigeration, tempering in various mining and metal handling operations, sugar processing, production of boric acid, recovery of salts from seawater, pulp and paper production and wood processing.

Geothermal desalinization of sea water holds promise for abundant supply of fresh water. In some areas it is a real alternative to fossil fuels and hydroelectricity and in future may help meet the crisis of our insatiable appetite for energy.

iii. Phenomena Associated with Volcanism :

In some regions of current or past volcanic activity some phenomena related to volcanism are found. Fumaroles, hot springs and geysers are the widely known belonging to this group. During the process of consolidation of molten magma either at the surface or at some depths beneath the surface gaseous emanations may be given off.

These gas vents constitute the fumaroles. The Valley of Ten Thousand Smokes in Alaska is a well-known fumarole and is maintained as a national monument. This group of fumaroles was formed by the eruption of Mount Katmai in 1912. This valley of area of about 130 square kilometres contains thousands of vents discharging steam and gases.

These gases are of varied temperatures and the temperatures vary from that of ordinary steam to superheated steam coming out as dry gas. Many of the gases escaping from the vents may be poisonous, such as hydrogen sulphide and carbon monoxide which are suffocating and may settle at low places in the topography. For example, the fumaroles at the Poison Valley, Java discharge deadly poisonous gases.

Solfataras are fumaroles emitting sulphur gases. At some places, the hydrogen sulphide gases undergo oxidation on exposure to air to form sulphur. The sulphur accumulates in large amount so that the rocks close to the solfataras may contain commercial quantities of sulphur.

Hot springs are also phenomena associated with volcanic activity. Waters from the surface which penetrate into the ground can get heated either by contact with the rocks which are still hot or by gaseous emanations from the volcanic rocks. The water so heated may re-emerge at the surface giving rise to hot springs. In some situations the hot springs may be intermittently eruptive. Such intermittently hot springs are called geysers.

Related Articles:

• Lava: Types and Eruptions | Volcanoes
• Submarine and Sub Glacial Eruptions | Volcanoes

Science , Essay , Geology , Volcanoes , Essay on Volcanoes

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How to Write Great Essay Hooks (Tips + Examples)

Table of contents

Yona Schnitzer

Blank screen. Cursor blinks. Clock ticks. Brain freezes.

You stressfully wonder, “How will I ever finish this essay?”

I’ve been there. 

Every time you write an essay, you want to catch your readers’ undivided attention from the very first word. The opening hook has to be *perfect* — no compromises. 

But, instead of reeling under pressure to come up with this elusively perfect essay hook at the eleventh hour, I’ve found a better way to write great essay hooks. 

In this guide, I’ll tell you what it takes to write the most compelling and attention-grabbing hooks. I’ll also break down six awesome types of essay hooks you can experiment with and share examples to inspire your next opening statement.

What is an Essay Hook?

An essay hook is the opening statement of an essay, written to capture readers' attention and nudge them to learn more about the topic. Also known as a lede or lead, this hook introduces readers to the topic/theme of the essay and piques their curiosity to continue reading. 

The hook creates the entire narrative for your essay. It tells readers what to expect from the rest of the essay and creates context around your main argument or thesis statement. 

6 Types of Essay Hooks You Can Experiment With

I’ve created this handy list of six different types of essay hooks. You can choose the one that best fits your essay’s context and create a stellar opening statement within minutes. 

1. Compelling fact or statistic

Lead with evidence and use a powerful fact or statistic as your essay hook. It’s one of the best ways to capture readers’ attention from the start and keep them intrigued throughout your essay. 

For example, if you’re writing about the importance of time management for freelancers, you have two options to create your opening sentence:

Generic : “Managing time as a freelancer is no easy feat.”

Impactful : “Nearly 70% of freelancers struggle to effectively divide and manage their time between multiple clients.” 

This data point, linked to the original research, sets a strong tone for your essay and draws people in to read more. It communicates  

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Finding relevant statistics for any topic is one of the hardest parts of the job. 

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• Open the Wordtune editor and add your essay title. 
• Type in any content you've written, click on 'Add spice,' and select the 'Expand on' option.
• Write 'statistics,' and Wordtune will add relevant data points to your content.

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2. Bold claim hook

When working on an argumentative essay , I always write with the mindset that nobody has the time to read my thoughts from start to finish. So, I have to get to the point quickly and make a solid argument worth people’s time. 

That's when opening with a bold claim works best. Condense all your views on the topic into a few thought-provoking lines that would make readers go, hmmm…

But remember, you can't open with a claim that people already know and accept as fact. It has to be something original and unique to make your readers tick, nudging them to dive deeper into your essay. 

For example, if you’re writing about water crisis, you have two options to open your essay: 

‍ "In some regions, there is not enough clean water for people to use."

‍ "Imagine a world where every drop of water is a battle, a precious commodity fought over by scores of people and animals alike. This can become a reality as early as 2050."

This bold claim presents a convincing argument about the global water crisis. It also emphasizes the urgency of this argument with a research-backed statistic.

Create a bold claim suggestion using AI

Can’t think of a strong opening sentence for your essay? Wordtune can translate your thoughts into a bold claim and create a compelling essay hook. 

Open your Wordtune editor and write a few lines related to your topic. These sentences should have a consensus among your audience. Then, choose the 'Counterargument' option from the list of suggestions. 

And you’ll have a bold claim for your essay with no effort at all!

3. Story/Anecdote hook

In all my years of writing, I’ve noticed how stories have a unique effect on people. A good story can resonate with a bigger audience, pique their curiosity, and deliver a more personal message. 

That's why you can cite a personal anecdote or talk about a publicly known story as a good hook for your essay. This hook allows you to play with words and work in more storytelling . 

One of my favorite writing tips applies here: enter the scene as late as possible and leave as early as possible. You have to keep it crisp instead of rambling on and on. 

Consider these two examples:

Either of these hooks could work fine if we were just writing a personal essay about a move to a new place. But if we’re specifically writing about the sky, the second example is better. It sticks to the point — the sky and the color of the sky — and doesn’t stray into irrelevant details. 

Create a compelling story with AI

I get it—not all of us are natural storytellers. But you can use AI to your advantage to create a concise and exciting story for your essay.  

Wordtune can help you write a short story from scratch or trim down your writing into a quick anecdote. Click on the expand or shorten button to edit your story any way you like. 

4. Question Hook

Humans have a tendency to immediately look for answers every time they come across fascinating questions. Using questions as essay hooks can reel people into your essay and feed their curiosity.

But questions are also fairly overused in essays. You don't want to use a generic question that makes people say, " Not another question ." 

Instead, think of questions that approach your topic from a fresh angle. This means honing in on what was especially interesting or surprising from your research—and maybe even brainstorming different questions to find the most fascinating one.

For example, if you’re writing about the psychology behind why we buy, you have two options to open your essay:

‍ “Do you know what factors compel us to buy certain things?”

Plugged in :

“Before buying anything, have you ever taken a moment to pause and think about possible reasons driving you to this purchase?”

The latter is more descriptive and creates a realistic scenario for readers to truly think about the topic of the essay.

5. Description hook

A descriptive hook works best when writing an explanatory or opinion-led essay. Descriptive hooks, as the name suggests, illustrate a topic in detail to create context for the essay. It's a good way to build awareness for and educate readers on lesser-known themes.

But a descriptive hook can easily become too plain or unexciting to read. To make it work, you have to write an engaging description using imagery, analogies, and other figures of speech. 

Remember to make your hook reader-friendly by avoiding passive voice, mainstream cliches, and lengthy sentences.

Consider this example:

Describing a sunset is too cliche, so cross that one off the list. Describing the sky as it is on a normal day wouldn't be shocking or unexpected, so scratch that one, too.

This example creates something unique by using analogies to describe the color of the sky and painting a beautiful picture. 

Write a gripping description with AI

Writing an exciting hook for a boring topic is more challenging than it looks. But Wordtune makes it a breeze with just two steps:

• Open the Wordtune editor and write your essay topic.
• Click on Explain or Emphasize and let it work its magic.

You can also change the tone of voice to make the text more in tune with your theme. 

6. Metaphor hook

One of my favorite essay hooks is to open with a persuasive metaphor to contextualize the topic. Metaphors can help you approach the topic from a completely different lens and wow your readers with interesting insight. 

Metaphors are also super versatile to make your writing more impactful. You can write a one-line metaphor or create a scenario comparing one thing to another and linking it to your topic. 

For example, if you’re writing about the experience of working at a startup, you can open your essay with these two options:

Short & sweet: "Joining a startup is like strapping into a rollercoaster: be ready to witness thrilling highs and sinking drops."

Long & descriptive : “Picture a small sailboat navigating the unpredictable winds and tides in a vast ocean. That’s a startup operating in a massive market. And with the right vision, this journey is filled with risks and rewards.” 

Create a convincing metaphor with AI

Writing good metaphors takes up a lot of creative brain power. You can always use Wordtune to find some extra inspiration if you're out of creative ideas. 

Type your opening line in the Wordtune editor and click on the 'Give an analogy' option. You can ask for as many suggestions as you want till you find the best one! 

What to Know About Your Essay (and Topic) Before You Write the Hook

Whether you’re writing a research paper on economics, an argumentative essay for your college composition class, or a personal essay sharing your thoughts on a topic, you need to nail down a few things before you settle on the first line for your essay.

‍ Let me break them down for you. 

1. Gain in-depth knowledge of your topic

Before you start writing your essay, you need to know your topic — not just in name, but in-depth. You don't have to become a subject matter expert overnight. But you do need to research the topic inside out 

Your research will help you:

• Narrow your focus
• Build an argument
• Shape the narrative

Your research insights determine your essay’s structure and guide your choice of hook. 

After organizing your research in a neat outline, think to yourself: ‍Did you uncover a shocking fact? A compelling anecdote? An interesting quote? Any of those things could be your hook.

⚡ ‍ Take action: After finishing your research, review your notes and think through your essay. Mark or make a list of anything compelling enough to be a good lead.

2. Type of essay

In academic settings, there are generally three kinds of essays:

• Argumentative: Making the case for a certain stance or route of action.
• Expository: Explaining the who, what, when, where, why, and how of some phenomenon.
• Narrative: Telling a true story as a way to explore different ideas.

‍ The type of essay you’re writing is key to choosing the best hook for your piece. 

A serious argumentative essay can start with a shocking statistic or a bold claim. And an expository essay can open with a descriptive hook while a metaphor hook would work best for a narrative essay.

⚡ ‍ Take action: Go through your list of potential hooks and cross out anything that doesn't fit the type of essay you're writing, whether it's persuasive , argumentative, or any other type.

3. Audience and tone

A best practice I often share with writers is to think of one reader and keep yourself in their shoes . This exercise can tell you so much about your audience — what kind of tone they like, what matters the most to them, what topics interest them, and so on. 

You can use these insights to create a compelling essay hook. Here’s how:

• For an argumentative essay, you’re trying to convince someone who doesn’t agree with you that what you’re claiming is right or, at least, reasonable. You don’t want to turn them off with snarky or offensive language — but you do want to be authoritative. Your hook should match that tone and support your effort.
• A narrative essay is likely to welcome more lyrical language, so starting with a colorful description or an anecdote might make more sense than, say, a bold claim or surprising fact. Whatever tone you choose for your narrative essay — comical or gentle or bold — should be used for your hook.
• ‍ Expository essays can use all sorts of tones and be written to a variety of audiences, so think carefully about the tone that best fits your subject matter. An essay explaining how the human body shuts down when overdosed will likely require a different tone than one on the lives of circus masters in the late 1800s. 

⚡ ‍ Take action: Look at your list. Can you write these potential hooks in a tone that suits your subject and audience?

4. Length of essay

Are you writing a 10-page paper or a three-page reflection? Or is this your senior thesis, pushing over 100 pages?

‍ If you’re writing a shorter paper, you’ll want to keep your hook quick and snappy.  

Readers are expecting a quick read, and they don’t want to spend five minutes only going through the introduction. 

In contrast, you can approach a longer essay — like a senior thesis or a term paper — with a longer hook. Just make sure your hook relates to and supports the core point of your essay. You don’t want to waste space describing a scene that ultimately has nothing to do with the rest of your piece.

⚡ ‍ Take action: If you write out the items on your list, how long will they be? A sentence or paragraph? Perfect. Two to five paragraphs? Unless your essay is on the longer side, you may want to save that information for later in the piece.

‍ Now that you know the basic facts about what you’re writing, let’s look at some approaches you could use to catch those readers — and reel them in.

3 Approaches to Avoid When Writing Hooks 

I’ve read hundreds of essays — enough to recognize lazy writing from the first few words. It’s equally easy for readers to discard your essays as ‘poorly written’ just by reading the first line. 

So, I made a list of three types of essay hooks you want to avoid at all costs because these hooks can only disappoint your readers. 

1. Quotations

Quotes are probably the most overused type of hook in any form of writing. What's even worse is rinsing and repeating the same old quotes from Abraham Lincoln or Nelson Mandela in your essays. 

No matter how powerful a quote sounds, you shouldn’t slap it at the opening of your essay. It doesn’t give readers the excitement of reading something original and looks lazy.

For example, if you’re writing an essay on productivity, here’s what a good and bad lede looks like:

“Amateurs sit and wait for inspiration, the rest of us just get up and go to work” – Stephen King

Did you know that consuming 100 gms of sugar can slash your productivity levels by over 50% in a day?  

2. Definitions

The New Oxford American Dictionary defines a hook as "a thing designed to catch people's attention." 

If I opened my article with this dictionary definition of a hook, you’d have either dozed off or left this page long back to find something more interesting. 

Here's the thing: definitions put people to sleep. Readers don't want to see a formal, jargon-heavy definition of a topic as the very first line of an essay. Your opening statement should have some personality in it to show readers they're in for an exciting read. 

For example, if you’re writing about happy hormones, here’s what a good and bad lede looks like:

Happy hormones are known to boost the happiness levels in your body by creating positive feelings.

Ever wondered why cat videos make you instantly happy, and ice creams give you an extra dose of energy? It's all about how happy hormones control our brain chemistry.

3. “Imagine this”

Opening your essay with "Imagine this" used to be an interesting way to put your readers in a scenario and set the context for your essay. But now, it's far too cliched and just another lazy attempt to write an essay hook. 

You can create a relatable scenario for users without asking them to imagine or picture it. Use the descriptive hook format with an interesting choice of words to convey the same ideas more creatively.

For example, if you’re writing an essay on preparing for higher studies abroad, here’s what a good and bad lede looks like:

Imagine this: You’ve been applying to multiple universities, writing SOPs, and preparing for exams without guidance. Everything can go south any minute. 

College application season is officially here. But with each passing day, you’re under more and more stress to apply to your chosen colleges and tick all the items off your list.

‍Our Go-To Trick for Writing Catchy Hooks

This opening statement can make or break your entire essay. While I’ve broken down my best tips to create the best essay hooks, here’s a surefire way to write compelling openings :

Go through your notes and either outline your essay or write the whole thing. This way, you’ll know the central thread (or throughline) that runs throughout your piece. 

Once your essay or outline is complete, go back through and identify a particularly compelling fact, claim, or example that relates to that central thread.

‍Write up that fact, claim, or example as the hook for your essay using any of the methods we’ve covered. Then revise or write your essay so the hook leads smoothly into the rest of the piece and you don’t repeat that information elsewhere.

Does your hook spark curiosity in you? 

Did that fact surprise you in the research stage? 

Chances are, your readers will have the same reaction.

And that’s exactly what you want.

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How to Write a Hook: Start Off Your Essay Strong with This Guide

What is a Hook for an Essay: Importance and Purpose

Which section of your essay can make your readers dip their toes into your writing? Is it the body paragraphs where all the analysis is laid out? Or maybe the introduction, where you present your thesis statement and voice your perspective on the subject? Well, if you think it is the latter, then we must agree with your decision. However, let's get more specific; if we take the introductory paragraph to pieces, which piece gets the most recognition? You must have guessed from the article's title that we're talking about a hook. But first, let's define what is a hook for an essay before we walk you through the reasons why it deserves our pat on the back.

The hook is the initial sentence in a written work. Whether you're asking how to write a hook for a song, blog post, or term paper, know that the purpose of any effective hook is to seize the reader's attention. It can be one sentence long, often for shorter pieces, or composed of several lines - usually for larger pieces. Making the reader want to keep reading is what an essay hook accomplishes for your paper, just as an intriguing introduction does for any piece.

Our main emphasis in this guide is on creating a good hook for an essay. Nonetheless, these fundamental guidelines apply to nearly every format for communicating with your audience. Whether writing a personal statement, a speech, or a presentation, making a solid first impression is crucial to spur your readers into action.

How to Write a Hook for Different Kinds of Writing

Although it is a tough skill to master, understanding how to write a hook is crucial for academic writing success. By reviewing the most prevalent kinds of essay hooks, you can discover how to effectively captivate readers from the start and generate a hook that is ideal for your article. To do so, let's head over to the following sections prepared by our dissertation writers .

How to Write a Hook for a College Essay?

By mastering how to write a hook for a college essay, you have the opportunity to stand out from the hundreds of applicants with identical academic portfolios to yours in your college essay. It should shed light on who you are, represent your true nature, and show your individuality. But first, you need an attention-grabbing start if you want the admissions committee to read more of yours than theirs. For this, you'll require a strong hook.

Set the Scene

When wondering how to write a good hook for an essay, consider setting the scene. Open in the middle of a key moment, plunge in with vivid details and conversation to keep your essay flowing and attract the reader. Make the reader feel like they are seeing a moment from your life and have just tuned in.

Open with an Example

Starting with a specific example is also a great idea if you're explaining how you acquired a particular skill or unique accomplishment. Then, similar to how you established the scenario above, you may return to this point later and discuss its significance throughout the remaining sections.

Open with an Anecdote

Using an anecdotal hook doesn't necessarily mean that your essay should also be humorous. The joke should be short and well-aimed to achieve the best results. To assist the reader in visualizing the situation and understanding what you are up against when tackling a task or overcoming a challenge, you might also use a funny irony. And if this sounds too overwhelming to compose, buy an essay on our platform and let our expert writers convey your unmatched story!

How to Write a Hook for an Argumentative Essay?

If you write a strong hook, your instructor will be compelled to read your argument in the following paragraphs. So, put your creative thinking cap on while crafting the hook, and write in a way that entices readers to continue reading the essay.

Use Statistics

Statistics serve as a useful hook because they encourage research. When used in argumentative writing, statistics can introduce readers to previously undiscovered details and data. That can greatly increase their desire to read your article from start to finish. You can also consider this advice when unsure how to write a good hook for a research paper. Especially if you're conducting a quantitative study, a statistic hook can be a solid start.

Use a Common Misconception

Another answer to your 'how to write a hook for an argumentative essay' question is to use a common misconception. What could be a better way to construct an interesting hook, which should grab readers' attention, than to incorporate a widely held misconception? A widespread false belief is one that many people hold to be true. When you create a hook with a misinterpretation, you startle your readers and immediately capture their interest.

How to Write a Hook for a Persuasive Essay?

The finest hooks for a persuasive essay capture the reader's interest while leading them to almost unconsciously support your position even before they are aware of it. You can accomplish this by employing the following hook ideas for an essay:

Ask a Rhetorical Question

By posing a query at the outset of your essay, you may engage the reader's critical thinking and whet their appetite for the solution you won't provide until later. Try to formulate a question wide enough for them to not immediately know the answer and detailed enough to avoid becoming a generic hook.

Use an Emotional Appeal

This is a fantastic approach to arouse sympathy and draw the reader into your cause. By appealing to the reader's emotions, you may establish a bond that encourages them to read more and get invested in the subject you cover.

Using these strategies, you won't have to wonder how to write a hook for a persuasive essay anymore!

How to Write a Hook for a Literary Analysis Essay?

Finding strong essay openers might be particularly challenging when writing a literary analysis. Coming up with something very remarkable on your own while writing about someone else's work is no easy feat. But we have some expert solutions below:

Use Literary Quotes

Using a literary quote sounds like the best option when unsure how to write a hook for a literary analysis essay. Nonetheless, its use is not restricted to that and is mostly determined by the style and meaning of the quotes. Still, when employing literary quotes, it's crucial to show two things at once: first, how well you understand the textual information. And second, you know how to capture the reader's interest right away.

Employ Quotes from Famous People

This is another style of hook that is frequently employed in literary analysis. But if you wonder how to write a good essay hook without sounding boring, choose a historical person with notable accomplishments and keep your readers intrigued and inspired to read more.

How to Write a Hook for an Informative Essay?

In an informative essay, your ultimate goal is to not only educate your audience but also engage and keep them interested from the very beginning. For this, consider the following:

Start with a Fact or Definition

You might begin your essay with an interesting fact or by giving a definition related to your subject. The same standard applies here for most types mentioned above: it must be intriguing, surprising, and/or alarming.

Ask Questions that Relate to Your Topic

Another solution to 'How to write a hook for an informative essay?' is to introduce your essay with a relevant question. This hook lets you pique a reader's interest in your essay and urge them to keep reading as they ponder the answer.

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Expert-Approved Tips for Writing an Essay Hook

Are you still struggling with the ideal opening sentence for your essay? Check out some advice from our essay helper on how to write a hook sentence and make your opening stand out.

• Keep your essay type in mind . Remember to keep your hook relevant. An effective hook for an argumentative or descriptive essay format will differ greatly. Therefore, the relevancy of the hook might be even more important than the content it conveys.
• Decide on the purpose of your hook . When unsure how to write a hook for an essay, try asking the following questions: What result are you hoping to get from it? Would you like your readers to be curious? Or, even better, surprised? Perhaps even somewhat caught off guard? Determine the effect you wish to accomplish before selecting a hook.
• Choose a hook at the end of the writing process. Even though it should be the first sentence of your paper, it doesn't mean you should write your hook first. Writing an essay is a long and creative process. So, if you can't think of an effective hook at the beginning, just keep writing according to your plan, and it will eventually come into your head. If you were lucky enough to concoct your hook immediately, double-check your writing to see if it still fits into the whole text and its style once you've finished writing.
• Make it short . The shorter, the better – this rule works for essay hooks. Keeping your hook to a minimum size will ensure that readers will read it at the same moment they start looking at your essay. Even before thinking if they want or don't want to read it, their attention will be captured, and their curiosity will get the best of them. So, they will continue reading the entire text to discover as much as possible.

Now you know how to write a good hook and understand that a solid hook is the difference between someone delving further into your work or abandoning it immediately. With our hook examples for an essay, you can do more than just write a great paper. We do not doubt that you can even write a winning term paper example right away!

Try to become an even better writer with the help of our paper writing service . Give them the freedom to write superior hooks and full essays for you so you may learn from them!

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How to Write the Ultimate Essay Hook

4-minute read

• 6th May 2023

Never underestimate the power of an essay hook . This opening statement is meant to grab the reader’s attention and convince them to keep reading. But how do you write one that’ll pack a punch? In this article, we’ll break this down.

What Is an Essay Hook?

An essay hook is the first thing your audience will read. If it doesn’t hook them right off the bat, they might decide not to keep reading. It’s important that your opening statement is impactful while not being too wordy or presumptuous.

It’s also crucial that it clearly relates to your topic. You don’t want to mislead your readers into thinking your essay is about something it’s not. So, what kind of essay hook should you write? Here are seven ideas to choose from:

1.   Story

Everyone likes a good story. If an interesting story or anecdote relates to your essay topic, the hook is a great place to include it. For example:

The key to a good story hook is keeping it short and sweet. You’re not writing a novel in addition to an essay!

2.   Fact

Another great essay hook idea is to lay out a compelling fact or statistic. For example:

There are a few things to keep in mind when doing this. Make sure it’s relevant to your topic, accurate, and something your audience will care about. And, of course, be sure to cite your sources properly.

3.   Metaphor or Simile

If you want to get a little more creative with your essay hook, try using a metaphor or simile . A metaphor states that something is something else in a figurative sense, while a simile states that something is like something else.

Metaphors and similes are effective because they provide a visual for your readers, making them think about a concept in a different way. However, be careful not to make them too far-fetched or overly exaggerated.

4.   Question

Asking your audience a question is a great way to hook them. Not only does it make them think, but they’ll also want to keep reading because you will have sparked their curiosity. For example:

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Try to avoid using questions that start with something along the lines of “Have you ever wondered…?” Instead, try to think of a question they may never have wondered about. And be sure not to answer it right away, at least not fully. Use your essay to do that!

5.   Declaration

Making a bold statement or declaring a strong opinion can immediately catch people’s attention. For example:

Regardless of whether your reader agrees with you, they’ll probably want to keep reading to find out how you will back up your claim. Just make sure your declaration isn’t too controversial, or you might scare readers away!

6.   Common Misconception

Laying out a common misconception is another useful way to hook your reader. For example:

If your readers don’t know that a common belief is actually a misconception, they’ll likely be interested in learning more. And if they are already aware, it’s probably a topic they’re interested in, so they’ll want to read more.

7.   Description

You can put your descriptive powers into action with your essay hook. Creating interesting or compelling imagery places your reader into a scene, making the words come alive.

A description can be something beautiful and appealing or emotionally charged and provoking. Either way, descriptive writing is a powerful way to immerse your audience and keep them reading.

When writing an essay, don’t skimp on the essay hook! The opening statement has the potential to convince your audience to hear what you have to say or to let them walk away. We hope our ideas have given you some inspiration.

And once you finish writing your essay, make sure to send it to our editors. We’ll check it for grammar, spelling, word choice, references, and more. Try it out for free today with a 500-word sample !

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73 Essay Hook Examples

An essay hook is the first one or two sentences of your essay that are used to grab the reader’s attention and draw them into your discussion.

It is called a hook because it “grabs” the reader and doesn’t let them go! It should have something in there that makes the reader feel curious and intrigued, compelling them to continue reading.

Techniques for Good Essay Hooks

Here are a few techniques that you can use to write a good essay hook:

• Use a Quotation : Sometimes, a relevant quotation from a well-known author or expert can help establish the context or theme of your essay. Next time you’re conducting research for an essay, keep an eye out for a really compelling quote that you could use as your hook for that essay.
• Start with a Statement that is Surprising or Unusual: A surprising or unusually statement will draw a reader in, making them want to know more about that topic. It’s good if the statement contradicts common knowledge or reveals an insight about your topic that isn’t immediately obvious. These can be particularly good for argumentative essays where you’re putting forward a controversial or compelling argument as your thesis statement .
• Tell a Brief Anecdote : A short, interesting story related to your topic can personaize the story, making it more than just a dry essay, and turning it into a compelling narrative that’s worth reading.
• Use Statistics or Facts: Interesting, surprising, or shocking facts or statistics work similarly to surprising statements: they make us want to know more about a topic. Statistics and facts in your introductions are particularly useful for analytical, expository , and argumentative essays.
• Start with a Question: Questions that make the reader think deeply about an issue, or pose a question that the reader themselves has considered, can be really effecitve. But remember, questions tend to be better for informal and personal essays, and are generally not allowed in formal argumentative essays. If you’re not sure if you’re allowed to use questions in your essays, check with your teacher first.

Below, I’ll present some examples of hooks that you could use as inspiration when writing your own essay hook.

Essay Hook Examples

These examples might help stimulate your thinking. However, keep in mind that your essay hook needs to be unique to your essay, so use these as inspiration but write your own essay hook that’s perfect for your own essay.

1. For an Essay About Yourself

An essay about yourself can be personal, use “I” statements, and include memories or thoughts that are deeply personal to you.

• Question: “Have you ever met someone who could turn even the most mundane events into a thrilling adventure? Let me introduce myself.”
• Anecdote: “The smell of freshly baked cookies always takes me back to the day when I accidentally started a baking business at the age of nine.”
• Intriguing Statement: “I’ve always believed that you haven’t truly lived until you’ve read a book upside down, danced in the rain, or taught a parrot to say ‘I love pizza.'”
• Quotation: “As Mark Twain once said, ‘The secret of getting ahead is getting started.’ That’s a philosophy I’ve embraced in every aspect of my life.”
• Humorous Statement: “I’m a self-proclaimed ‘professional chocolate tester’ – a title that’s not only delicious but also requires extreme dedication.”
• Start with your Mission Statement : “My life motto is simple but powerful: be the person who decided to go for it.
• Fact or Statistic: “According to a study, people who speak more than one language tend to be better at multitasking . As a polyglot, I certainly live up to that statistic.”
• Comparison or Metaphor: “If my life were a book, it would be a blend of an adventurous novel, a suspense thriller, and a pinch of romantic comedy.”
• Personal Revelation: “Ever since I was a child, I’ve had an uncanny ability to communicate with animals. It’s an unusual skill, but one that has shaped my life in many ways.”
• Narrative: “The day everything changed for me was an ordinary Tuesday. Little did I know, a single conversation would lead me to discover my true passion.”

2. For a Reflective Essay

A reflective essay often explores personal experiences, feelings, and thoughts. So, your hooks for reflective essays can usually be more personal, intriguing, and engaging than other types of essays. Here are some examples for inspiration:

• Question: “Have you ever felt as though a single moment could change your entire life? This essay is going to explore that moment for me.”
• Anecdote: “I was standing on the edge of the Grand Canyon, looking at the vast emptiness, and for the first time, I truly understood the word ‘perspective’.”
• Bold Statement: “There is a part of me that is still trapped in that room, on that rainy afternoon, holding the letter that would change everything.”
• Personal Revelation: “The first time I truly felt a sense of belonging wasn’t in a crowded room full of friends, but in the quiet solitude of a forest.”
• Intriguing Statement: “In my life, silence has been a teacher more profound than any words could ever be.”
• Quotation: “Einstein once said, ‘The only source of knowledge is experience.’ Now, looking back, I realize how profound that statement truly is.”
• Comparison or Metaphor: “If my life is a tapestry, then that summer was the vibrant thread that changed the entire pattern.”
• Narrative: “As the train pulled out of the station, I realized I wasn’t just leaving my hometown, I was leaving my old self behind.”
• Philosophical Statement: “In the theater of life, we are both the actor and the audience, playing our part and watching ourselves simultaneously.”
• Emotive Statement: “There is a sort of sweet sorrow in remembering, a joy tinged with a hint of sadness, like the last notes of a beautiful song.”

For an Argumentative Essay

Essay hooks for argumentative essays are often the hardest. This type of essay tends to require the most formal type of academic writing, meaning your hook shouldn’t use first person, and should be more based on fact and objectivity, often at the expense of creativity. Here are some examples.

• Quotation: “Thomas Jefferson once said, ‘Whenever the people are well-informed, they can be trusted with their own government.’ If Jefferson were alive today, he would likely feel that this meed for a well-informed citizenry is falling well short of where he would aspire.”
• Provocative Statement: “Despite what romantic films may portray, love at first sight is merely a myth perpetuated by society. This essay will prosecute the argument that love at first sight is a myth.”
• Statistical Fact: “According to the World Health Organization, depression is the leading psychological disability worldwide. Yet, mental health is still stigmatized and often overlooked. This essay will argue that depression should be seen as a health issue, and stigmatization of depression causes serious harm to society.”
• Comparison: “Much like an unchecked infection, climate change, if left ignored, can spread far beyond what it is today, causing long-term economic and social problems that may even threaten the longevity of humanity itself.”
• Contradiction : “While we live in an era of unprecedented technological advancements, millions around the world are still denied basic internet access.”
• Bold Declaration: “Animal testing is not only ethically unacceptable, but it also undermines the progress of medical research.”
• Challenging Belief: “Despite popular belief, the automation of jobs is not a threat but an opportunity for society to evolve.”
• Quotation: “George Orwell wrote in ‘1984’, ‘Big Brother is Watching You.’ In our modern society, with the advancement of technology, this is becoming more of a reality than fiction.”
• Intriguing Statement: “Despite countless diet fads and fitness trends, obesity rates continue to rise. This argumentative essay will argue that this is because medical practitioners’ approaches to health and weight loss are fundamentally flawed.”
• Statistical Fact: “Research reveals that over 90% of the world’s plastic waste is not recycled. This alarming figure calls for a drastic change in social attitudes towards consumption and waste management.”
• Challenging Assumption: “Society often assumes that progress and growth are intrinsically good, but this is not always the case in the realm of economic development.”
• Contradiction: “Western society upholds the value of freedom, yet every day, members of society cede personal liberties in the name of convenience and security.”
• Analogy: “Like an overplayed song, when a news story is repeated too often, it loses its impact. In the era of digital media, society is becoming desensitized to critical issues.”
• Relevant Anecdote: “In a village in India, the arrival of a single computer transformed the lives of the residents. This small anecdote underscores the importance of digital inclusion in today’s world.”
• Call to Rethink: “In a world where success is often equated with financial wealth, it is time for society to reconsidered what truly constitutes a successful life.”

For a Compare and Contrast Essay

A compare and contrast essay examines two issues, looking at both the similarities and differences between them. A good hook for a compare and contrast essay will immediately signal to the reader the subjects that are being compared and why they’re being compared. Here are sine ideas for hooks for a compare and contrast essay:

• Quotation: “As Charles Dickens wrote in his novel ‘A Tale of Two Cities’, ‘It was the best of times, it was the worst of times’. This could equally apply to the contrasting dynamics of urban and rural living.”
• Provocative Statement: “Despite popular belief, cats and dogs have more in common than society tends to think.”
• Comparison: “Comparing being an only child to growing up with siblings is like contrasting a solo performance with an orchestral symphony.”
• Contradiction: “While many view classic literature and contemporary fiction as worlds apart, they are more akin to two sides of the same coin.”
• Bold Declaration: “Android and iPhone may compete in the same market, but their philosophies could not be more different.”
• Statistical Fact: “Statistics show that children who grow up reading books tend to perform better academically than those who do not. But, the jury is out on how reading traditional books compares to reading e-books on screens.”
• Quotation: “As Robert Louis Stevenson once wrote, ‘Sooner or later, we all sit down to a banquet of consequences.’ This statement can be used to frame a comparison between short-term and long-term thinking.”
• Provocative Statement: “Democracy and dictatorship are often seen as polar opposites, but are they are not as different as they seem.”
• Comparison: “Climate change and plastic pollution are two major environmental issues, yet they demand different approaches and solutions.”
• Contradiction: “While traditional classrooms and online learning are seen as separate modes of education, they can often blend into a cohesive learning experience.”
• Bold Declaration: “Though both based on merit, the structures of capitalism and socialism lead to vastly different societal outcomes.”
• Imagery: “The painting styles of Van Gogh and Monet can be contrasted as a stormy sea versus a tranquil pond.”
• Historical Reference: “The philosophies of the Cold War-era – capitalism and communism – provide a lens to contrast economic systems.”
• Literary Comparison: “The dystopian societies portrayed in George Orwell’s ‘1984’ and Aldous Huxley’s ‘Brave New World’ serve as contrasting visions of the future.”
• Philosophical Question: “Individualism and collectivism shape societies in distinct ways, but neither one can truly exist without the other.”

See Here for my Guide on Writing a Compare and Contrast Essay

For a Psychology Essay

Writing an engaging hook for a psychology essay involves sparking the reader’s interest in the human mind, behavior, or the specific psychology topic you’re discussing. Here are some stimulating hooks for a psychology essay:

• Rhetorical Question: “How much control do we truly have over our own actions?”
• Quotation: “Sigmund Freud once said, ‘Unexpressed emotions will never die. They are buried alive and will come forth later in uglier ways.’ This essay will explore whether this is universally true.”
• Provocative Statement: “Contrary to popular belief, ‘venting out’ anger might actually be fueling the fire of fury.”
• Comparison: “Just as an iceberg reveals only a fraction of its bulk above water, conscious minds may only be a small piece of who humans truly are.”
• Contradiction: “While it may seem counterintuitive, studies show that individuals who are more intelligent are also more likely to suffer from mental health issues.”
• Bold Declaration: “Despite advances in technology, understanding the human brain remains one of the final frontiers in science.”
• Statistical Fact: “According to a study by the American Psychological Association, nearly one in five adults in the U.S. lives with a mental illness. Yet, mental health continues to be a topic shrouded in stigma.”

For a Sociology Essay

Writing an engaging hook for a sociology essay involves sparking the reader’s interest in social behaviors, cultural phenomena, or the specific sociology topic you’re discussing. Here are ideas for hooks for a sociology essay:

• Quotation: “As Karl Marx once noted, ‘Social progress can be measured exactly by the social position of the fair sex.’ Sadly, society has not made much progress in gender equality.”
• Provocative Statement: “Social media, initially created to connect people, is ironically leading society into an era of unprecedented isolation.”
• Comparison: “Comparing society to a theater, where each individual plays a role, it is possible to start to see patterns and scripts embedded in daily interactions.”
• Contradiction: “While people often believe that technology is bringing society closer together, evidence suggests that it’s actually driving a wedge between people, creating ‘digital divides’.”
• Bold Declaration: “Human societies are constructed on deeply ingrained systems of inequality, often invisible to those benefiting from them.”
• Statistical Fact: “A recent study found that women still earn only 81 cents for every dollar earned by men. This stark wage gap raises questions about equality in the workforce.”

For a College Application Essay

A college essay is a personal statement where you can showcase who you are beyond your grades and resume. It’s your chance to tell your unique story. Here are ten potential hooks for a college essay:

• Anecdote: “At the age of seven, with a wooden spoon as my baton, I confidently conducted an orchestra of pots and pans in my grandmother’s kitchen.”
• Provocative Statement: “I believe that life is like a game of chess. The king might be the most important piece, but it’s the pawns that can change the entire course of the game.”
• Personal Revelation: “It wasn’t until I was lost in a foreign city, armed with nothing but a map in a language I didn’t understand, that I truly discovered my love for adventure.”
• Intriguing Question: “Have you ever wondered how it feels to be part of two completely different cultures, yet wholly belong to neither?”
• Bold Declaration: “Breaking a bone can be a painful experience. Breaking stereotypes, however, is an entirely different kind of challenge.”
• Unusual Fact: “I can recite the periodic table backwards while juggling three tennis balls. It’s a strange talent, but it’s a perfect metaphor for how I tackle challenges.”
• Quotation: “As Albert Einstein once said, ‘Imagination is more important than knowledge.’ This quote has defined my approach to learning.”
• Narrative: “It was a cold winter’s day when I first discovered the magic of turning a blank page into a world full of characters, stories, and ideas.”
• Metaphor: “Like a caterpillar transforming into a butterfly, my high school years have been a period of profound metamorphosis.”
• Humorous Statement: “Being the youngest of five siblings, I quickly learned that the best way to be heard was to become the family’s unofficial lawyer.”

Conclusion: The Qualities of a Good Essay Hook

As I wrap up this article, I want to share a few last tips on qualities that a good essay hook should have. Keep these tips in mind when writing your essay hook and using the above essay hook examples:

First, relevance . A good hook should be directly relevant to the topic or theme of your essay. The hook should provide a preview of what’s to come without giving too much away.

Second, Intrigue. A great hook should make the reader want to continue reading. It should create a question in the reader’s mind or present a fascinating idea that they want to know more about.

Third, uniqueness. An effective hook should be original and unique. It should stand out from the many other essays that the reader might be going through.

Fourth, clarity. Even though a hook should be captivating and original, it should also be clear and easy to understand. Avoid complex sentences and jargon that might confuse the reader.

Fifth, genre conventions. Too often, my students try to be so creative in their essay hooks that they forget genre conventions . The more formal an essay, the harder it is to write the hook. My general approach is to focus on statistics and facts, and avoid rhetorical questions , with more formal essay hooks.

Keep in mind that you should run your essay hook by your teacher by showing them your first draft before you submit your essay for grading. This will help you to make sure it follows genre conventions and is well-written.

Chris Drew (PhD)

Dr. Chris Drew is the founder of the Helpful Professor. He holds a PhD in education and has published over 20 articles in scholarly journals. He is the former editor of the Journal of Learning Development in Higher Education. [Image Descriptor: Photo of Chris]

• Chris Drew (PhD) https://helpfulprofessor.com/author/chris-drew-phd/ 5 Top Tips for Succeeding at University
• Chris Drew (PhD) https://helpfulprofessor.com/author/chris-drew-phd/ 50 Durable Goods Examples
• Chris Drew (PhD) https://helpfulprofessor.com/author/chris-drew-phd/ 100 Consumer Goods Examples
• Chris Drew (PhD) https://helpfulprofessor.com/author/chris-drew-phd/ 30 Globalization Pros and Cons

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Essay On The Volcano – 10 Lines, Short & Long Essay For Kids

Key Points To Remember When Writing An Essay On The Volcano For Lower Primary Classes

10 lines on the volcano for kids, a paragraph on the volcano for children, short essay on volcano in 200 words for kids, long essay on volcano for children, interesting facts about volcanoes for children, what will your child learn from this essay.

A volcano is a mountain formed through an opening on the Earth’s surface and pushes out lava and rock fragments through that. It is a conical mass that grows large and is found in different sizes. Volcanoes in Hawaiian islands are more than 4000 meters above sea level, and sometimes the total height of a volcano may exceed 9000 meters, depending on the region it is found. Here you will know and learn how to write an essay on a volcano for classes 1, 2 & 3 kids. We will cover writing tips for your essay on a volcano in English and some fun facts about volcanoes in general.

Volcanoes are formed as a result of natural phenomena on the Earth’s surface. There are several types of volcanoes, and each may emit multiple gases. Below are some key points to remember when writing an essay on a volcano:

• Start with an introduction about how volcanoes are formed. How they impact the Earth, what they produce, and things to watch out for.
• Discuss the different types of volcanoes and talk about the differences between them.
• Cover the consequences when volcanoes erupt and the extent of the damage on Earth.
• Write a conclusion paragraph for your essay and summarise it. 

When writing a few lines on a volcano, it’s crucial to state interesting facts that children will remember. Below are 10 lines on volcanoes for an essay for classes 1 & 2 kids.

• Some volcanoes erupt in explosions, and then some release magma quietly.
• Lava is hot and molten red in colour and cools down to become black in colour. 
• Hot gases trapped inside the Earth are released when a volcano erupts.
• A circle of volcanoes is referred to as the ‘Ring of Fire.’
• Volcano formations are known as seismic activities.
• Active volcanoes are spread all across the earth. 
• Volcanoes can remain inactive for thousands of years and suddenly erupt.
• Most volcanic eruptions occur underwater and result from plates diverging from the margins.
• Volcanic hazards happen in the form of ashes, lava flows, ballistics, etc.
• Volcanic regions have turned into tourist attractions such as the ones in Hawaii.

Volcanoes can be spotted at the meeting points of tectonic plates. Like this, there are tons of interesting facts your kids can learn about volcanoes. Here is a short paragraph on a volcano for children:

A volcano can be defined as an opening in a planet through which lava, gases, and molten rock come out. Earthquake activity around a volcano can give plenty of insight into when it will erupt. The liquid inside a volcano is called magma (lava), which can harden. The Roman word for the volcano is ‘vulcan,’ which means God of Fire. Earth is not the only planet in the solar system with volcanoes; there is one on Mars called the Olympus Mons. There are mainly three types of volcanoes: active, dormant, and extinct. Some eruptions are explosive, and some happen as slow-flowing lava.

Small changes occur in volcanoes, determining if the magma is rising or not flowing enough. One of the common ways to forecast eruptions is by analysing the summit and slopes of these formations. Below is a short essay for classes 1, 2, & 3:

As a student, I have always been curious about volcanoes, and I recently studied a lot about them. Do you know? Krakatoa is a volcano that made an enormous sound when it exploded. Maleo birds seek refuge in the soil found near volcanoes, and they also bury their eggs in these lands as it keeps the eggs warm. Lava salt is a popular condiment used for cooking and extracted from volcanic rocks. And it is famous for its health benefits and is considered superior to other forms of rock or sea salts. Changes in natural gas composition in volcanoes can predict how explosive an eruption can be. A volcano is labelled active if it constantly generates seismic activity and releases magma, and it is considered dormant if it has not exploded for a long time. Gas bubbles can form inside volcanoes and blow up to 1000 times their original size!

Volcanic eruptions can happen through small cracks on the Earth’s surface, fissures, and new landforms. Poisonous gases and debris get mixed with the lava released during these explosions. Here is a long essay for class 3 kids on volcanoes:

Lava can come in different forms, and this is what makes volcanoes unique. Volcanic eruptions can be dangerous and may lead to loss of life, damaging the environment. Lava ejected from a volcano can be fluid, viscous, and may take up different shapes. 

When pressure builds up below the Earth’s crust due to natural gases accumulating, that’s when a volcanic explosion happens. Lava and rocks are shot out from the surface to make room on the seafloor. Volcanic eruptions can lead to landslides, ash formations, and lava flows, called natural disasters. Active volcanoes frequently erupt, while the dormant ones are unpredictable. Thousands of years can pass until dormant volcanoes erupt, making their eruption unpredictable. Extinct volcanoes are those that have never erupted in history.

The Earth is not the only planet in the solar system with volcanoes. Many volcanoes exist on several other planets, such as Mars, Venus, etc. Venus is the one planet with the most volcanoes in our solar system. Extremely high temperatures and pressure cause rocks in the volcano to melt and become liquid. This is referred to as magma, and when magma reaches the Earth’s surface, it gets called lava. On Earth, seafloors and common mountains were born from volcanic eruptions in the past.

What Is A Volcano And How Is It Formed?

A volcano is an opening on the Earth’s crust from where molten lava, rocks, and natural gases come out. It is formed when tectonic plates shift or when the ocean plate sinks. Volcano shapes are formed when molten rock, ash, and lava are released from the Earth’s surface and solidify.

Types Of Volcanoes

Given below various types of volcanoes –

1. Shield Volcano

It has gentle sliding slopes and ejects basaltic lava. These are created by the low-viscosity lava eruption that can reach a great distance from a vent.

2. Composite Volcano (Strato)

A composite volcano can stand thousands of meters tall and feature mudflow and pyroclastic deposits.

3. Caldera Volcano

When a volcano explodes and collapses, a large depression is formed, which is called the Caldera.

4. Cinder Cone Volcano

It’s a steep conical hill formed from hardened lava, tephra, and ash deposits.

Causes Of Volcano Eruptions

Following are the most common causes of volcano eruptions:

1. Shifting Of Tectonic Plates

When tectonic plates slide below one another, water is trapped, and pressure builds up by squeezing the plates. This produces enough heat, and gases rise in the chambers, leading to an explosion from underwater to the surface.

2. Environmental Conditions

Sometimes drastic changes in natural environments can lead to volcanoes becoming active again.

3. Natural Phenomena

We all understand that the Earth’s mantle is very hot. So, the rock present in it melts due to high temperature. This thin lava travels to the crust as it can float easily. As the area’s density is compromised, the magma gets to the surface and explodes.

How Does Volcano Affect Human Life?

Active volcanoes threaten human life since they often erupt and affect the environment. It forces people to migrate far away as the amount of heat and poisonous gases it emits cannot be tolerated by humans.

Here are some interesting facts:

• The lava is extremely hot!
• The liquid inside a volcano is known as magma. The liquid outside is called it is lava.
• The largest volcano in the solar system is found on Mars.
• Mauna Loa in Hawaii is the largest volcano on Earth.
• Volcanoes are found where tectonic plates meet and move.

Your child will learn a lot about how Earth works and why volcanoes are classified as natural disasters, what are their types and how they are formed.

Now that you know enough about volcanoes, you can start writing the essay. For more information on volcanoes, be sure to read and explore more.

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Why Electro’s Exacting Duo Justice Wanted to Break Its Own Rules

For “Hyperdrama,” Gaspard Augé and Xavier de Rosnay’s first album in eight years, the duo added genre experiments and guests to its arsenal of bangers.

By Eric Ducker

Reporting from Indio, Calif.

The sun was setting on the opening night of the Coachella Valley Music and Arts Festival last weekend and the mood backstage in Justice’s artist compound was simmering anxiety, masked by glasses of wine and discrete vaping.

In a few hours, the Paris-based electronic music duo would debut an all-new stage show and give fans an early taste of “Hyperdrama,” its new studio album, out April 26. The setting was meaningful: Justice played its first real show at Coachella in 2007 just before releasing “Cross,” the album that propelled it to the forefront of the electro scene, and this appearance would be its first big concert since 2018.

In the eight years since Justice’s “Woman” LP arrived, dance music subgenres have risen and fallen in favor, yet the pair has remained indifferent, focused strictly on its own trajectory. “Hyperdrama,” a 13-track album with guest appearances by Miguel, Thundercat and Tame Impala, riffs on its longtime aesthetic — melodic hooks, funky bass lines, the occasional blown-out fuzzy beat — and stretches out in fresh ways.

Though Justice’s Gaspard Augé and Xavier de Rosnay were joined by friends and former collaborators, many of whom had flown in from France, the two remained on the fringes of the backstage gathering, periodically conferring with their longtime lighting designer, Vincent Lérisson, or Pedro Winter, the manager who discovered them in the early 2000s. The new show is a complex production built largely around Lérisson’s massive, swirling display, which took over 18 months to create and involves 11 tons of lights and kinetic motors on trusses. Justice prides itself on its precision, and knew there were hundreds of things that could go wrong.

The pair finally took the stage just before 10:30 p.m. and faced each other in Celine suits and sunglasses, unleashing intertwining grooves from across its discography. Songs from “Hyperdrama,” like the four-on-the-floor thump of “Neverender” and the relentless “Generator,” fit seamlessly with “D.A.N.C.E.,” the buoyant single that earned its first Grammy nominations, and the scuzzy strut of “Phantom.”

The next morning, sitting by the pool of their Airbnb clad in an open-collared Hawaiian shirt (Augé) and a short-sleeved leopard-print button-up (de Rosnay), the duo dissected its approach to performances with its usual strict attention to detail.

“A record is not meant to be fully understandable the first time you listen to it,” de Rosnay, the chattier of the two said, in an interview conducted in English. “A live show, it has to be fully understandable whether you know us or not, which is the case in festivals. There might be a lot of people coming where they just know one song, they just heard of the band, or they’re maybe 17 years old and they’re like, ‘Oh yeah, my dad used to listen to that.’”

Augé, 44, and de Rosnay, 41, met through mutual friends when they were young graphic designers, later deciding to commit themselves fully to music. “At some point we just had to choose, would you rather spend your life in front of a computer or spend your life in front of a computer?” Augé deadpanned.

They were both children of MTV’s video age, but Augé listened to more heavy metal and later the output of the British indie label Warp Records, known for its forward-thinking electronic music, while de Rosnay embraced hip-hop, which led him to older funk and soul tracks. Their early recordings were made in the free Apple software GarageBand, using samples from Italian horror scores and R&B jams. Sheering off the smoothness and predictability of the era’s European dance music, they created party soundtracks that felt dangerous yet sophisticated.

Earlier in their career, Justice would get frustrated when collaborators couldn’t transform the ideas that were in their heads into reality. Over the years, they’ve become more understanding, but not less exacting. The art director Thomas Jumin has worked on multiple Justice projects, dating back to the video for “DVNO” from 2007. He created the album art for “Hyperdrama” — the latest version of Justice’s cross motif — which took a year and a half to produce, and the discussions about it stretched back even longer.

“They like to try many different things around every idea to make their choice,” Jumin wrote in an email. “There are a lot of sketches and tests to decide if a detail, a color, or an effect is valid or not, and I know they have the same path in the studio. It’s a long process.”

“Cross” was followed by the grandiose “Audio, Video, Disco” in 2011, which charted on Billboard’s all-genre Top 200. “Woman” didn’t match its success, but the group remixed its live show and won a Grammy in 2019 for the result, “Woman Worldwide.”

Though the award came in an electronic dance music category, Justice has had an ambivalent relationship with the genre — and the idea of genre, itself. With its members’ leather jackets and stage stacked with Marshall amps, people perceived Justice’s debut album as a rock ’n’ roll take on electronic music. “The imagery led people to think that it was a heavy metal influence, but it was more distorted funk,” Augé said.

Alexander Ridha, who records and performs as Boys Noize, was living in Germany when he got a copy of one of Justice’s first singles, “Waters of Nazareth,” and was captivated by its embrace of distortion and aggression. He played it at a Berlin club when minimal techno was at its peak and immediately emptied the dance floor. “It was clear that this was the future,” he said during a recent call. “I had this really rare feeling of, ‘I’m onto something, but nobody knows it and nobody feels it.’”

Augé and de Rosnay spent two years touring behind “Woman,” another working on “Woman Worldwide” and then a year putting together the concert film “Iris: A Space Opera by Justice.” The pair started making “Hyperdrama” in February 2020, then paused until June since they couldn’t be in the studio together at the height of the pandemic. The pair’s guiding intention was to bring back a sense of playfulness in how they make music and reconsider some of the lessons they’d mastered. “You start learning about rules and ways things should be made,” de Rosnay said, “but the truth is that in most cases, things sound better if you just take a side step.”

Galvanized by the structural incoherence of the rapper Travis Scott’s multipart 2018 smash “Sicko Mode,” they fused three songs into one on the lead single “One Night/All Night,” which features guest vocals from Tame Impala’s Kevin Parker . Justice also found unexpected inspiration in gabber, a pummeling dance music subgenre from the Netherlands that can reach up to 190 beats per minute. Several of the songs on “Hyperdrama,” including “Afterimage” and “Incognito,” use a technique where Justice created a track incorporating gabber elements, then treated it almost like a sample — pitching the tempo down and harmonizing it to make something more melancholy.

The biggest departure in “Hyperdrama” comes during the album’s third quarter, where the duo leaves the dance floor behind and heads into cosmic territory. The dreamy three-song stretch of “Moonlight Rendez-Vous,” “Explorer” and “Muscle Memory” is “almost like one track that goes through different states of consciousness,” Augé said.

When Justice performs, it usually places some mics in the crowd to hear how people are reacting. At Coachella, the group told its sound engineer to cut them entirely so it could concentrate completely on the performance. It left the duo feeling a bit isolated, so they stole glances whenever they could to gauge the response. (The crowd was feeling it.) When it was over, Augé and de Rosnay patted each other on the back, looking a little stunned that they’d pulled it off.

Back at their compound, their friends greeted them with applause. There had been some mistakes, even if only they noticed them, and the celebration didn’t last long. The next morning, when asked how the rest of the night was, Augé replied, “Quiet.” They were already thinking about rehearsals and the adjustments that they had to make for Coachella’s second weekend.

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