Weathering And Erosion
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Transcript of Weathering And Erosion
![Page 1: Weathering And Erosion](https://reader036.fdocuments.us/reader036/viewer/2022070321/558e4f9e1a28ab0d318b477d/html5/thumbnails/1.jpg)
How does the earth change?
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Water and Ice
weathering
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Mechanical Weathering:
Water and Ice
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Frost Wedging
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Lima Beans – Mechanical Weathering
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Physically Broken
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Plant Roots
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Mechanical Weathering
• Old Man of the Mountains
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Chemical weathering
• Rocks break down through Chemical Changes:• Changing rocks• Can be done by:
– Water– Oxygen– Carbon Dioxide– Acid RainChemical Weathering CHANGES rocks permanently!
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Water• Water weathers rock by dissolving it
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Oxygen• Iron combines with
oxygen in the water (oxidation)
• The product of oxidation is rust
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Carbon Dioxide
• CO2 dissolves in rain water and creates carbonic acid
• Carbonic acid easily weathers limestone and marble
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Living Organisms
• Lichens that grow on rocks produce weak acids that chemically weather rock
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Limestone near the surface
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Chemical Erosion
• breaks down rocks one atom at a time
• dissolves or changes minerals • minerals carried away in water
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Agent Erosion
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Agent Erosion
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Wind Erosion
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Mass Movements
• Landslides, mudslides