The science of volcanos.
A volcano is when a mountain explodes with lava.Magma builds up the pressure and cumes thrugh the earths crust.
The Rest Of The Story
Mt.St.Helens in the state of washington erupted on may 18,1980.It started with an earthquake and stream vent episodes,57 people were hurt 27 people were rescued. 1.1billion dollers of damage happened. It was famous because it was the only one on mainland U.S.