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The rock cycle is a process in which rocks are continuously transformed between the three rock types igneous, sedimentary and metamorphic.

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Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.

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Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place.

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Sediment is solid material that is moved and deposited in a new location.Sediment can consist of rocks and minerals,as well as the remains of plants and animals

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Igneous rock, or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.

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Scientists use the term magma for molten rock that is underground and lava for molten rock that breaks through the Earth's surface.