• a volcano is a landform (usually a a volcano is a landform (usually a mountain) where (liquid rock) erupts mountain) where (liquid rock) erupts through the surface of the planet.through the surface of the planet.

• in other places, two plates collide.one in other places, two plates collide.one plate is dragged down under the plate is dragged down under the other.deep inside the earth, it melts into other.deep inside the earth, it melts into magma, which then rises up threw cracks magma, which then rises up threw cracks in the crust and erupts as a volcanoin the crust and erupts as a volcano

• the outer core is about 2,200km thick and the outer core is about 2,200km thick and like a boiling hot sea of liquid metal like a boiling hot sea of liquid metal (mostly iron and nickle)(mostly iron and nickle)

• The name "volcano" has its origin from the The name "volcano" has its origin from the name of Vulcan, a god of fire in Roman name of Vulcan, a god of fire in Roman mythology.mythology.