Question

What is a volcano? What causes a volcano?​

Answer 1

Answer:

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.

Explanation:

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Answer 2

VOLCANO:

• A volcano is an opening in the earth's crust through which lava, volcanic ash, and gases escape. ... Beneath a volcano, liquid magma containing dissolved gases rises through cracks in the Earth's crust.

Causes of volcano:

• Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface. At the surface, it erupts to form lava flows and ash deposits. Over time as the volcano continues to erupt, it will get bigger and bigger.