Weathering breaks down the rock into little pieces and rolls down a hill.
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The pieces of rock roll down the hill and pile on top of eachother.
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From the pressure of the other rocks, they layered on top of each other and all became one big rock. They became a sedimentary rock.
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The heat and pressure from the Earth brought the metamorphic rock underground and melted it into magma. The magma went up into the magma chamber of a volcano.
The magma shoots out of the volcano and starts to cool.
The magma cools back into an igneous rock and the cycle starts all over.