Volcano: A mountain where there is a tube of lava on the inside which runs to the center of the earth.
Volcanologist: A person who studies volcanoes and works with them.
Volcanic Eruption: An explosion of a volcanic mountain that has pressure on the inside.
Volcanic Vent: A hole in the volcano where magma comes out and turns into lava.
Magma: melted rock inside of the earth
Lava: magma when it is outside of the earth