Weathering and Erosion

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What is weathering?

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The process of breaking down rocks into smaller pieces by physical, chemical, or biological means.

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What is erosion?

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The process of moving weathered rock and soil from one location to another, often by water, wind, or ice.

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What is physical/mechanical weathering?

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The breaking down of rocks without changing their chemical composition, often caused by temperature changes, freezing, and thawing.

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What is chemical weathering?

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The process that breaks down rocks through chemical reactions, often involving water and substances in the environment.

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What is biological weathering?

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Weathering caused by living organisms, such as plants and animals, that can break down rocks.

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What is frost wedging?

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A type of physical weathering where water seeps into cracks in rocks, freezes, expands, and causes the rock to break apart.

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How do lichen contribute to weathering?

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Lichen can both physically break down rocks and chemically alter them, leading to weathering.

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What role does water play in erosion?

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Water can carry away soil and rock particles, shaping landscapes and forming features like canyons.

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What is the Grand Canyon primarily formed by?

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The Grand Canyon was primarily formed by the erosive action of the Colorado River over millions of years.

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What is the impact of wind on erosion?

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Wind can erode surfaces by carrying away fine particles, especially in dry and sandy environments.