Dynamic Earth: Changing Earth's Surface

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Weathering Definition

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The physical and chemical processes that change objects on Earth's surface over time.

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Example of Weathering

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Brightly painted walls fading and shiny cars becoming rusty.

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Sediment Mixing

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Different sizes of sediment tend to mix when moved by water.

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Weathering Over Time

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Changes Earth's surface from what it was in the past to what it will be in the future.

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Weathering and Soil Formation

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Weathering contributes to soil formation by breaking down rocks.

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Weathering and Ecosystems

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Affects ecosystems by altering habitats and nutrient cycles.

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Deposition is a constructive process.

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Deposition is the laying down or settling of eroded material.

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Seep (verb)

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To flow slowly through small openings.

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Deposition occurs when energy decreases.

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Sediment is laid down as water and wind slow down.

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Animals contribute to physical weathering.

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They make holes in the soil, allowing water to enter and cause weathering.