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20 Cards in this Set
- Front
- Back
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what is the process by which rocks are broken down physically or chemicly called?
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weathering
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What is it called when rocks are broken into smaller pieces by physical mean?
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mechanical weathering
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which of the following is an agent of mechanical weathering?
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gravity
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what is the alternate freezing and thawing of soil and rock called?
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frost action
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What type of frost action occurs when a crack in a rock widens from the freezing and thawing of water?
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ice wedging
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what is the grinding and wearing away of rock by other rocks or sand called?
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abrasion
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what causes abrasion when one rock falls off a mountainside onto another rock?
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gravity
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Which is an example of a plant causing mechanical weathering?
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Tree root causing rock to crack.
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What causes abrasions of rock and pebbles in fast flowing streams?
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water
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How can animals that live in soil cause mechanical weathering?
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by burrowing
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What is it called when rocks break down due to chemical reactions?
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chemical weathering
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