Weathering

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  • Created by: Revisonf
  • Created on: 01-01-14 15:04
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  • Weathering
    • happens in drainage basins - it's when rock breakdown where they are
    • TYPE 1: Mechanical
      • The breakdown of rocks without changing its chemical composition.
        • EXAMPLE:     Freeze-thaw weathering is a type of mechanical weathering
          • Where temperature fluctuates above and below 0 degrees. Water gets into the cracks of the rocks. When it freezes it puts pressure on the rock as it expands. When the water thaws, it contracts, this releases pressure on the rock. This occuring repeatedly causes the rock to breakdown.
          • TYPE 1: Mechanical
            • The breakdown of rocks without changing its chemical composition.
              • EXAMPLE:     Freeze-thaw weathering is a type of mechanical weathering
                • Where temperature fluctuates above and below 0 degrees. Water gets into the cracks of the rocks. When it freezes it puts pressure on the rock as it expands. When the water thaws, it contracts, this releases pressure on the rock. This occuring repeatedly causes the rock to breakdown.
    • TYPE 2: CHEMICAL
      • The  breakdown of rock by changing its chemical composition.
        • EXAMPLE:     Carbonation weathering is an example of chemical weathering that happens in warm and wet conditions.
          • Rainwater has CO2 in it which makes is a carbonic acid. This reacts with the calcium carbonate in rocks, so the rocks are dissolved by rainwater
          • TYPE 2: CHEMICAL
            • The  breakdown of rock by changing its chemical composition.
              • EXAMPLE:     Carbonation weathering is an example of chemical weathering that happens in warm and wet conditions.
                • Rainwater has CO2 in it which makes is a carbonic acid. This reacts with the calcium carbonate in rocks, so the rocks are dissolved by rainwater
    • TYPE 3: BIOLOGICAL
      • Is the breakdown of living things
        • EXAMPLE:      Plant roots break down roots by growing into cracks on their surfaces and pushing them apart.
          • TYPE 3: BIOLOGICAL
            • Is the breakdown of living things
              • EXAMPLE:      Plant roots break down roots by growing into cracks on their surfaces and pushing them apart.

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