How does magma get onto the surface of the Earth?

1.	How does magma get onto the surface of the Earth?
Answer» Magma forms from partial melting of mantle rocks. As the rocks move upward (or have water ADDED to them), they start to melt a little BIT. ... Eventually the pressure from these BUBBLES is stronger than the SURROUNDING SOLID rock and this surrounding rock fractures, allowing the magma to get to the surface.

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