All About Volcanoes!
A volcano is an opening in the earth through which incredibly hot, melted rock flows up from beneath the surface. This sometimes explodes out of the volcano, which can be risky for people living nearby. Deep below the surface of the Earth, the lower you dig, the warmer it gets, until a layer is reached where some of the rocks become hot enough to melt. They turn into a burning, flowing substance called magma. Pressure sometimes builds inside the earth, pushing magma up through a crack in the surface, and this is how volcanoes form. Once magma bursts out of the top of a volcano it has a different name. Scientists call it lava, and different sorts of lava are found in different kinds of volcanoes. Even though volcanoes are dangerous, many people in the world live near them.
Volcanoes come in different shapes. Some are mountains with a hole in the top; others can be flatter or smaller. Not all volcanoes are likely to explode, sending burning hot lava everywhere. Volcanoes which have a lot of water vapor inside them, mixed in with the lava, are more likely to blow up. When a volcano blows up scientists say it is erupting. Other volcanoes do not have much water vapor in their lava and they are usually quieter. Their lava slowly oozes out instead of exploding suddenly.
People living near volcanoes can grow wonderful crops on the fertile soil which is found there. The soil is rich in minerals from rocks that were broken apart when the volcano erupted thousands of years ago. Many people are interested in volcanoes and will travel to see them erupting. This means that people who make their homes near volcanoes can sometimes make a living looking after tourists. People will probably always choose to live near volcanoes, no matter how dangerous they are.
- Volcano Facts: A collection of useful facts about volcanoes.
- Natural History of Volcanoes: Learn about the different types of volcanoes and what forms them, including an interactive volcano building tool.
- Living Near Volcanoes: A lesson plan in which children investigate why people choose to live near a volcano and what life might be like for them.
- Make A Volcano: Instructions showing how to make a volcano using household ingredients, and information about different types of volcanoes.
- Learning About Lava: A lesson plan showing how lava flows, including an activity using play dough to demonstrate how lava layers are created.
- Volcanoes And The Earth's Core: How changes in the earth's core lead to volcanoes forming.
- Volcano Field Trip: A trip around volcanoes in cyberspace, including volcano facts and images of volcanoes erupting.
- Volcano Lessons: A series of short lessons about volcanoes, full of useful facts and images.
- Learn About Volcanoes: A page of volcano information with many colorful and helpful pictures.
- How Volcanoes Form: This page explains how volcanoes are formed when the surface of the earth moves.
- Volcano Facts And Quiz: Information about volcanoes followed by a quiz.
- Why Live Near A Volcano?: An interesting discussion about why some people live near dangerous volcanoes.
- What Are Volcanoes?: Explains what volcanoes are and includes a striking image of a volcano erupting.
- Volcanoes Past And Present: What people believed about volcanoes in the past and the problems that volcanoes cause today.
- Studying Volcanoes: Lesson plans for teachers containing a wealth of information about volcanoes.
- Volcanoes In Alaska: Facts about Alaskan volcanoes and volcanoes in general.
- Volcanoes Quiz: A short quiz to test volcano knowledge.
- Volcano Experiment: This explains how to make a simple model volcano.
- Volcano Fun : Pictures, puzzles, games and videos, all on the subject of volcanoes.
- Volcanoes In Pictures: Facts about volcanoes with many illustrations.
- Volcano Games: A collection of games that can be played online, all on the topic of volcanoes.
- Volcanic Eruptions: Explains how scientists try to work out when a volcano will erupt and the equipment that they use.
- Volcano Lesson Plan: Teaches the science of volcanoes and suggests ways in which the class can build a model volcano together.
- Interactive Volcano Experience: Words, sounds and images showing how the earth's surface moves and volcanoes are created.
- Volcano Types: A lesson plan that suggests how students can research the different types of volcanoes.
- Volcano Geology: A page of geology facts, videos, games and projects, including many about volcanoes.
- Volcano Hazards: The dangers people face when a volcano erupts.
- All About Volcanoes: Everything anyone could want to know about volcanoes, including comics and games as well as images and facts.
- Three Types Of Volcano: A clear guide to three important types of volcano.
- Volcanoes And Earthquakes: Questions about volcanoes and earthquakes, with links to webpages that provide the answers.