Question

What causes a volcano?

Answer 1

Most of the world's volcanoes are found around the edges of tectonic plates, both on land and in the oceans. On land, volcanoes form when one tectonic plate moves under another. When enough magma builds up in the magma chamber, it forces its way up to the surface and erupts, often causing volcanic eruptions.

Answer 2

  Volcanoes

What causes volcanoes?

Inside the earth's core there is a red-hot liquid rock, called magma.

Volcanoes happen when magma rises to the surface of the earth, which causes bubbles of gas to appear in it.

This gas can cause pressure to build up in the mountain, and it eventually explodes. When the magma bursts out of the earth, it is called lava.

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