1. volcanoes Volcanoes are the openings in the earths surface. When they erupt they let out ash, gas and hot magma.

2. Watch this! http://www.youtube.com/watch?v=R0Zbj7S22zs

3. How do volcanoes happen? Peoples quotes: "Deep below the Earth's crust, the temperatures and pressures are great enough to melt rock. When this molten rock blasts to the surface, the result is a volcano - and for the inhabitants of the place, it's as if Hell has been let loose." (Natural Disasters, Readers Digest,1996)

4. Famous eruptions Mt st Helens in America what happened in 1980’s and there is a lot more of them that happened like in Italy.