Rocks and the Rock Cycle

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Cooling and hardening of molten magma. Rate of cooling determines what rock forms.

Minerals in an existing rock are changed by heat or pressure below the surface.

depicts how the three major rock types (igneous, sedimentary, and metamorphic) convert from one to another.

Rock is exposed to extreme heat and pressure within the Earth and does not melt.  Metamorphism may change mineral composition and texture.

The formation of mineral grains from cooling magma.

To form sedimentary rock, sediment must _____ ____ _____ together.

Weathering wears rocks at the Earth’s surface down into smaller pieces

description of the size, shape, and arrangement of mineral grains