Here's some facts about volcanoes. Volcanoes have a magma chamber\lava/ash/crater and crust. Here's how a volcano erupts. It erupts from the magma chamber. The magma chamber does it because it builds up pressure and the lava reaches the top. Then the pressure of the lava is pushing up to explode. Here it comes BOOM! The lava now comes out. Here are some facts about under water volcanoes. When a volcano explodes under water it can form a new island. So that's what volcanoes do.
By Ben
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