A volcano erupts when the magma gets to hot and then it explodes.when a volcano erupts little pieces of Rock explode out and when they are red that means they are hot but after a while when they are black they have cooled down.
A volcano erupts when the magma gets to hot and then it explodes.when a volcano erupts little pieces of Rock explode out and when they are red that means they are hot but after a while when they are black they have cooled down.