Magma is the hot, molten rock below the earth's crust. When magma emerges from a volcano it is called lava. Lava is molten when it emerges but is still called lava when it cools and becomes solid. read more
Magma is the hot, molten rock below the earth’s crust. When magma emerges from a volcano it is called lava. Lava is molten when it emerges but is still called lava when it cools and becomes solid. read more