Surface Processes - Weathering-Soils

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What is weathering?

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Weathering is the process of breaking down rocks and minerals into smaller pieces through physical, chemical, or biological means.

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What are the two main types of weathering?

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The two main types of weathering are physical (mechanical) weathering and chemical weathering.

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How does freezing water contribute to weathering?

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Freezing water expands in cracks of rocks, causing them to break apart.

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What is chemical weathering?

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Chemical weathering involves the alteration of the chemical composition of rocks and minerals, often through reactions with water, acids, or gases.

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What is oxidation in the context of weathering?

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Oxidation is a type of chemical weathering where oxygen reacts with minerals, often leading to rust formation.

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Which mineral is least likely to weather in a river over time?

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Garnet is the mineral that will weather least if left in a river for 100 years.

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What role does organic matter play in soil?

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Organic matter helps soil by holding water and providing nutrients as it decomposes.

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How does surface area affect the rate of weathering?

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As surface area increases, the rate of weathering increases because more of the rock is exposed to weathering agents.

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What is physical weathering?

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Physical weathering is the mechanical breakdown of rocks into smaller pieces without changing their chemical composition.

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What is an example of chemical weathering?

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An example of chemical weathering is the formation of rust on iron due to oxidation.