Geography- Changing landscapes of the UK- coasts

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  • Created by: Emdoorson
  • Created on: 28-08-19 22:06
Erosion
The wearing away of the land by moving agents e.g. the sea.
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Weathering
The breaking down or dissolving of rocks and minerals of Earth's surface.
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Explain the process of freeze thaw weathering
1. Water gets into joints of rock, 2. The water freezes, causing the rock to expand, putting pressure on the rock. 3. This causes the rock to break when the water thaws and contracts. This process is then repeated.
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Mass movement
The shifting of rock and material down a slope (cliff collapse) It occurs when the force of gravity acting on a slope is stronger than the force supporting it.
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Rock Sliding
When material falls in a straight line
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Rock slumping
When material falls in rotation
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State 2 characteristics of a destructive wave
1. Created in storm conditions 2. Have a short wave length and are high and steep.
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Solution
Chemical action on rocks by sea water. It is most effective on limestone which can easily be dissolved
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Discordant coastline
Alternating bands of hard and soft rock.
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Why does deposition occur?
1. Constructive waves have a strong swash and weak backwash. 2. Sheltered areas e.g. bays.
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Soft engineering example
Beach nourishment- sand replaced to beach to replaced sand washed away. This method protects the sand from being eroded without hard structures.
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Hard engineering example
Sea wall- Concrete barrier on coast, absorbing the waves energy. They protect the coastline and prevents erosion.
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Hard engineering
Involves man made structures that are designed to half the process of coast erosion
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Soft engineering
Methods are sustainable natural solutions which aim to reduce the rate of coastal erosion.
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Other cards in this set

Card 2

Front

Weathering

Back

The breaking down or dissolving of rocks and minerals of Earth's surface.

Card 3

Front

Explain the process of freeze thaw weathering

Back

Preview of the front of card 3

Card 4

Front

Mass movement

Back

Preview of the front of card 4

Card 5

Front

Rock Sliding

Back

Preview of the front of card 5
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