Unit 1A - Weathering
- Created by: Ajensen776
- Created on: 07-04-14 16:44
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- Weathering
- Mechanical Weathering
- Freeze-Thaw
- In some areas the temperature is above 0 degrees during the day and below 0 degrees at night
- During the day water gets into the cracks
- At night the water freezes and expands
- The water thaws the next day then freezes the next night
- Repeated freezing and thawing widens the cracks and causes the rock to break
- The water thaws the next day then freezes the next night
- At night the water freezes and expands
- During the day water gets into the cracks
- In some areas the temperature is above 0 degrees during the day and below 0 degrees at night
- Exfoliation
- Some areas have a big daily temperature range
- Each day the surface layers of rock heat up and expand further than the inner layers
- At night the surface layers cool down and contract faster than the inner layers
- This creates pressure within the rock and causes thin surface layers to peel off
- At night the surface layers cool down and contract faster than the inner layers
- Each day the surface layers of rock heat up and expand further than the inner layers
- Some areas have a big daily temperature range
- Freeze-Thaw
- Chemical Weathering
- Solution
- Some minerals that make up rocks are soluble in water for example rock salt
- The minerals dissolve in rainwater, breaking the rock down
- Some minerals that make up rocks are soluble in water for example rock salt
- Carbonation
- Rainwater has carbon dioxide in it, which makes it a weak carbonic acid.
- Carbonic acid reacts with rocks that contain calcium carbonate such as carboniferous limestone
- Rainwater has carbon dioxide in it, which makes it a weak carbonic acid.
- Solution
- Mechanical Weathering
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