Question

How do volcanos form

Answer 1

In a volcanic eruption the magma under the ground puts pressure on the rocks of the volcano and eventually it will crack allowing the magma to flow upwards. The magma goes through the cracks of the rocks and eventually turns into lava which pours out of the top of a volcano when it erupts. The volcano has the magma underneath the Earth’s crust, which is liquid rock, and pressure builds as this magma is traveling through the cracks in the rocks. The actual eruption happens when tectonic plates are moved to or from volcanoes, or an earthquake occurs that allows for the magma to escape from under the surface and out the volcano.

Step-by-step explanation:

Basically it is when magma is trapped under the surface and tries to go up through cracks in rocks, but due to the pressure and slow process it turns into lava and the volcano is formed.

Answer 2

Volcanoes form when magma from earth's upper mantle moves its way up to the surface. When the magma is all the way up the surface, it erupts and makes lava while at the same time, ash deposits. Once the volcano continues to erupt even more it starts getting bigger and bigger.

Step-by-step explanation: