Notes on How Rocks Change Sedimentary rock can change into metamorphic rock through heat and pressure. Sedimentary rock can change into igneous rock through melting of rock and cooling of magma. Sedimentary rock can change back into sedimentary rock by weathering, erosion, deposition then compaction and cementation of sediments. Igneous rock can change into metamorphic rock through heat and pressure. Igneous rock can change into sedimentary rock by weathering, erosion, deposition then compaction and cementation of sediments. Igneous rock can change back into igneous rock through melting of rock and cooling of magma. Metamorphic rock can change into sedimentary rock by weathering, erosion, deposition then compaction and cementation of sediments. Metamorphic rock can change into igneous rock through melting of rock and cooling of magma. Metamorphic rock can change back into metamorphic rock through heat and pressure. Sedimentary = weathering (breaking down), erosion (being carried away), deposition(being dropped off in a different location), then compaction and cementation of sediments Igneous = melting of rock and cooling (crystallization) of magma Metamorphic = heat and pressure Sediments – tiny particles of rock Lava – liquid rock above Earth’s surface Magma - liquid rock beneath Earth’s surface Cycle- a process that keeps repeating itself