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.
- How are volcanoes formed?
- How can they create islands?
- What kind of destruction can they cause?
- How do volcanoes affect our environment?
- Where in the earth can you find active volcanoes?
- Are there volcanoes on other planets?
- What are the different types of volcanoes?