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Weathering and Erosion
Weathering changes the surface of the Earth over time.
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Physical Weathering Process by which rocks are broken down into smaller pieces by external conditions. Types of Physical weathering Frost heaving and Frost wedging Plant roots Friction and impact Burrowing of animals Temperature changes
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Frost Wedging
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Frost Heaving
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Plant Roots
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Friction and Repeated Impact
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Burrowing of Animals
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Temperature Changes
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Chemical Weathering The process that breaks down rock through chemical changes. The agents of chemical weathering Water Oxygen Carbon dioxide Living organisms Acid rain
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Water Water weathers rock by dissolving it
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Oxygen Iron combines with oxygen in the presence of water in a processes called oxidation The product of oxidation is rust
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Features of Karst: Caves
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Erosion The process by which water, ice, wind or gravity moves fragments of rock and soil.
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Water Erosion Rivers, streams, and runoff
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Ice Erosion Glaciers
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Wind Erosion
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Mass Movements Landslides, mudslides, slump and creep
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