Coasts
- Created by: DANIELLEISGREAT
- Created on: 24-10-16 19:43
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- Coasts- erosion causes
- How physical processes shape the coast line - key words
- Prevailing wind - dominant wind in an area
- Crest- the top of a wave
- swash - movement of waves up a beach
- Backwash - movement of water down a beach
- Sub-aerial processes - a process which attacks the face and top of a cliff
- Marine erosion - the wearing away of rocks by the action f the sea
- Weathering - the breaking down of rocks by weather , plants or chemicals
- Chemical weathering - The breaking down of rocks because of chemicals , e.g acid rain
- Biological weathering- when an animal or plant causes weathering - e.g a plant growing through a crack in the rock
- Freeze thaw weathering - when water gets in the cracks of rock then freezes causing the rock to split.
- Most common types of weathering
- Corrosion (solution)
- Sea water is very corrosive so dissolves lime stone and chalk easily- meaning that erosion id more effective
- Sea water then gets into the cracks and when it evaporates salt crystals are left behind
- As more salt crystals form there may be so many that they force apart the rock
- Sea water then gets into the cracks and when it evaporates salt crystals are left behind
- Sea water is very corrosive so dissolves lime stone and chalk easily- meaning that erosion id more effective
- Wetting / drying
- Soft rocks expand when wet and contract when dry so they erode easier
- DRAW EROSION WEATERING ARROW THING
- Corrosion (solution)
- How physical processes shape the coast line - key words
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