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Welcome to the "Rocks and Minerals" slide show. To navigate your way through this slide show you need to click on the mineral and rock groups located directly under the text. Then you need to click on the small photos of the different rocks and minerals to view the larger photos.
Volcano Virtual Fieldtrip Trailhead--Volcanoes can be exciting and dangerous. They are also educational since they tell us a lot about the earth and even other planets. The inside of the Earth is very hot. Sometimes, this heat melts through the rock of the earth's crust, sending hot liquid rock (called magma) and gases onto the Earth's surface. A buildup of lava and ash around the area of an eruption becomes a volcano. Volcanoes can erupt for a very brief time or they can erupt many times over millions of years. Sometimes they sleep for long periods and people think they are finished, but they aren't. Mount St Helens was one of these sleeping volcanoes and it surprised everyone when it became active in 1980, causing a lot of destruction and loss of life.
This site is about a scientific expedition to the volcanoes of Costa Rica. Check out In the Lab to see what vulcanologists do.
Check out Volcano World for everything that is going on with volcanoes around the world.
This site has great animations and photos of volcanoes.
In Puzzles of the Earth you will learn about how the earth's plates move to cause volcanoes.
People in other countries are interested in volcanoes, too. You will find great photos here. What language is this?
2008/09/28 08:27:42 PDT