Weathering Rocks
- Created by: Ash
- Created on: 13-04-13 11:20
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- Weathering
- Mechanical
- Freeze Thaw Weathering
- 1. Some temperatures are above 0? C at day but below at night.
- 2. In the day, water get into a crack of rocks.
- 3. At night, the water freezes and expands - pressure is on the rock
- 4. Water thaws the next day and refreezes the next night.
- 5. Repitition of this creates more cracks and breaks the rock.
- Exfoliation
- 1. Big daily temperature ranges
- 2. In the day, the surface layers heat up and expand.
- 3. In the night, the surface layers cool down and contacts
- 4. This creates pressure within the rock and causes the thin layers to peel off.
- Freeze Thaw Weathering
- Chemical
- Solution
- Minerals within the rock can dissolve in water.
- These minerals can dissolve in rainwater.
- Carbonation
- Rain water consists of carbon dioxide.
- This makes it a weak carbonic acid.
- Carbonic acid reacts with rocks that contain calcium carbonate.
- Rocks such as carboniferous limestone are dissolved by rainwater.
- Carbonic acid reacts with rocks that contain calcium carbonate.
- This makes it a weak carbonic acid.
- Rain water consists of carbon dioxide.
- Solution
- Biological Weathering
- Breakdown of rocks by living things.
- Plant roots break down rocks by growing into cracks on their surfaces and pushing them apart.
- Burrowing animals may loosen small amounts of rock material.
- Breakdown of rocks by living things.
- Mechanical
- Burrowing animals may loosen small amounts of rock material.
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