1. A volcano is an opening on the surface of the Earth that holds lava. When it erupts, an eruption occurs.
2. Lava is molten rock that comes out of a volcano in liquid form to the surface of the Earth.
3. A crater is a large cavity on the surface of the earth that usually appears after an explosion or impact of a meteorite.
4. An ash cloud is volcanic ash released into the atmosphere after an eruption.
5. Magma is a hot liquid rock that is located under the surface of the earth.
