Coast Keywords

Physical Weathering
caused by changes in temperature. In hot weather, rock expands and it contracts in cold weather, causing the rocks to crack. This causes parts of cliffs to fall off.
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Chemical Weathering
Mildly acidic rain dissolves chemicals in the rock.
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Waves pick up rocks and pebbles and throw them against the base of the cliff, wearing it away.
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Some types of rock and pebbles react with seawater which dissolves the rock.
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Hydraulic Action
Air is forced into cracks by waves which widens the cracks. This is repeated over time.
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Rocks bang against each other by waves, making them smooth.
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Long Shore Drift
Sand and shingle is moved up the beach in this direction.
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Rocks move up the beach in swash (the direction of the preaviling winds)
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Rocks move down the beach in a straight line because of gravity.
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Hard Engineering
Putting in place concrete and steel to try and stop all erosion.
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Soft Engineering
This is using natural processes to try and slow down erosion. It is cheaper but doesn't work as well or last very long, e.g beach nourishment.
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Rip Rap/ Rock Armour
This is not too expensive and lasts for 30-50 years. They are rocks placed along the beach.
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This is a cheap method that doesn't last that long. The waves use up all their energy eroding the rocks and the wire frame is needed to hold the rock together.
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Other cards in this set

Card 2


Chemical Weathering


Mildly acidic rain dissolves chemicals in the rock.

Card 3




Preview of the front of card 3

Card 4




Preview of the front of card 4

Card 5


Hydraulic Action


Preview of the front of card 5
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