What is the rock cycle?
The rock cycle is the long process whereby rocks of one kind change into rocks of another kind.
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What are the three main types of rock and how are they formed?
1. Igneous rock - forms from the cooling and solidification of molten magma or lava.
2. Sedimentary rock - forms from the accumulation and compression of sediments.
3. Metamorphic rock - forms when existing rock is changed by heat and pressure.
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Describe what weathering is and the different types of weathering.
Weathering is the breaking down of rock material.
The two types are:
1. Freeze-thaw weathering - Water freezes and thaws inside rock cracks, widening them.
2. Onion-skin weathering - Heating and cooling of rock surface causes the outer layers to expand and contract, splitting and peeling off like onion skin.
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What is erosion?
Erosion is the wearing away and removal of rock material.
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What are transportation and deposition?
Transportation is the movement of eroded material by wind, water, and ice.
Deposition is the settling of transported sediment.
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