Weathering and Erosion

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Weathering and Erosion

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Presentation transcript:

Weathering and Erosion

Weathering The breakdown of the materials of Earth’s crust into smaller pieces.

The Agents of Weathering Ice Plant roots Friction and impact Burrowing of animals Temperature changes Water Oxygen Carbon dioxide Living organisms Acid rain

Frost Wedging (Ice)

Plant Roots

Burrowing of Animals

Temperature Changes

Water Water weathers rock by dissolving it

Oxygen Iron combines with oxygen in the presence of water in a processes called oxidation The product of oxidation is rust

Carbon Dioxide CO2 dissolves in rain water and creates carbonic acid Carbonic acid easily weathers limestone and marble

Living Organisms Lichens that grow on rocks produce weak acids that chemically weather rock

Acid Rain Compounds from burning coal, oil and gas react chemically with water forming acids. Acid rain causes very rapid chemical weathering

Erosion The process by which water, ice, wind or gravity moves fragments of rock and soil.

Water Erosion Rivers, streams, and runoff

Ice Erosion Glaciers

Wind Erosion