Rocks, Weathering, and Erosion

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What is erosion?

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Erosion is when rocks or soil are being moved from one place to another by wind and/or water.

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What is weathering?

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Weathering is the process of breaking down rocks, often caused by freezing water, wind, or temperature changes.

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How does freezing water cause weathering of rocks?

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Freezing water expands cracks and breaks rocks.

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What is luster in rocks?

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Luster is how shiny or dull a rock or mineral is.

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How do scientists classify rocks?

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Scientists classify rocks based on their physical attributes.

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What is a rock?

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A rock is a solid material made up of one or more minerals.

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What are the three main types of rocks?

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The three main types of rocks are igneous, sedimentary, and metamorphic.

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What is an igneous rock?

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Igneous rock is formed from cooled and solidified magma or lava.

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What is sedimentary rock?

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Sedimentary rock is formed from particles of sand, shells, and other fragments that are pressed together.

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What is metamorphic rock?

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Metamorphic rock is formed when existing rocks are changed by heat and pressure.