The Rock Cycle

The Rock Cycle Rock – a naturally formed solid that is usually made up of one or more types of minerals Rock Cycle – the set of natural processes that form, change, break down, and reform rocks.

3 Rock Types Review Igneous Rock – forms when molten rock cools and becomes solid. This can happen within earth or on the surface Sedimentary Rock – forms when pieces of older rocks, plants, and other materials get pressed and cemented together Metamorphic Rocks – forms when heat and pressure causes older rocks to change into new types of rocks. These are formed deep under the earth.

Describing the Rock Cycle A rock’s cycle begins by becoming one of the three types of rocks. If it begins as igneous, it can be changed with heat and pressure to become a metamorphic rock or it can reach the surface, be broken down and turn into a sedimentary rock.

Describing the Rock Cycle If the rock begins as sedimentary, then it can be changed by heat and pressure into a metamorphic rock or it can be broken down into sediment.

Describe the Rock Cycle If the rock begins as a metamorphic rock then it can be turned into magma which eventually becomes an igneous rock or it can be brought up to the surface of earth and broken down into sediment to become a sedimentary rock.

Rock Cycle Vocabulary Erosion – the movement of rock pieces from one place to another by wind, water, or ice Weathering – the breaking down of rocks by wind, water, ice, or plant roots Heat – high temperatures Pressure – caused by layering or weight Melting – occurs due to magma Deposition – when rocks are moved to a new location due to erosion

The Rock Cycle Igneous Rocks Weathering & Erosion Sedimentary Rocks Melting Weathering & Erosion Melting Heat & Pressure Heat & Pressure Metamorphic Rocks

Rock Cycle Questions What are the 3 types of rocks? Why is the set of natural processes by which rocks change into other types of rocks called a cycle? If a rock began as a metamorphic rock, what could happen to it? Draw a diagram showing how an igneous rock could change into a metamorphic rock and how the metamorphic rock could change into a sedimentary rock.