Volcanos

The volcanos can cause many disaster on Earth. The volcanos can form with a hot material inside of the Earth that rises and spills over the crust.This hot material is called magma,this material can come from 2 sources:a material that is very light and vibrant and also that is very hot.and the second material is a material that is subduction wich is lightweight and efervecent.This is how a volcano is form.