A volcano is a big (mountain, magma chamber, a volcano). At the end of a volcano there is a magma chamber. There is magma in the magma chamber. Magma is very hot liquid rock. Sometimes magma comes out of (mountain, magma chamber, a volcano). If magma comes out very often, we call a volcano active. If magma does not come out of a volcano for a very long time we call it (an inactive volcano, magma chamber, mountain). When magma comes out of a volcano we call it lava.

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