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6 Cards in this Set
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- Back
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What is the difference between mechanical weathering and chemical weathering? |
Mechanical weathering is the erosion of rock without changing the composition. Chemical weathering is the erosion of rock involving chemical reactions that change the composition so a new rock is formed. |
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Describe the soil profile. |
Top soil: Dead organic matter. Subsoil: Weathered clay and sand. Bedrock: Highly weathered parent bedrock. |
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What is the difference between residual soil and transported soil? |
Residual soil is from the breakup of existing bedrock underneath. Transported soil is from another source either by water, wind, or glaciers. |
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List the three ways rivers carry weathered material. |
1. Solution: Dissolved minerals (1/4) 2. Suspension: Silt and clay (1/2) 3. Bedload: Sand, gravel, and pebbles (1/4) |
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List the features formed by running water. |
1. Young river valleys: V-shaped, run straight. 2. Old river valleys: U-shaped, large meanders. 3. Gullies: Temporary streams in dry areas due to heavy rain. 4. Potholes: Whirlpools in rivers that form oval basins. 5. Waterfalls: Undermining of soft earth under a hard layer of rock. 6. Delta: Deposited sediment where a river meets the ocean. 7. Alluvial fan: Deposited sediment on land when a river flows down a cliff. |
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