What+causes+a+volcano+to+erupt?

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===**Well it takes a lot of time first. The volcano makes something called magma from matel rock.** === ===**The magma goes through a circulation. It has to form at the bottom of the volcano then make its way up to the main vent.** ===

=== **The main vent is a hole that is in the volcano and when the volcano is ready to erupt, the lava is at the top and the pressure will push up and the magma that will be inside will come out and when the magma that will come out will be called lava and it destroy's everything.** ===