Magma - Liquid rock in the earths mantle
Lava - Liquid rock from the earths mantle that comes out of the crater of a volcano
Crater - The place where magma flows out a volcano and turns into lava
Volcano - Place where liquid magma flows out from the earths mantle
Mid-ocean ridge - A place in the middle of an ocean where plates move apart and magma comes flowing out.
Stratovolcano - Coneshaped volcano with thick lava and explosive eruptions
Shieldvolcano - Relatively flat volcano with thinner lava and effusive eruptions