Metamorphic rocks can melt to become liquid magma again., Sedimentary rocks become metamorphic rocks due to heat and pressure changing it into another type of rock., When volcanos explode lava is pushed from the volcano. As it cools down igneous rock starts to form. Magma, on the inside of volcanos can also begin to cool and also form igneous rocks., Sediment becomes sedimentary rock when smaller rocks become squashed together on the sea floor. This process forms layers., Igneous rocks become sediment due to weathering and erosion. These break down larger rocks into smaller rocks., Liquid magma can once again be used to form igneous rocks by cooling inside or outside a volcano.

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