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What is mechanical weathering
Its the breakdown of rock without changing its chemical compostion. It happens in freeze-thaw weathering. Water gets into cracks, freezes, expands and puts pressure on the rock
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What is chemical weathering
Its the breakdown of rock by changing its chemical composition. Rain water has co2 in which makes a weak carbonic acid. This reacts with the rock
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What are the four processes of errosion
Hydraulic power, abrasion, atrition, solution
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What do destructive waves do
The errode the coast line as they high and steep and high frequency
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What is a wave cut notch
The notch is enlarged with errosion making the cliff above unstable
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How are headlands and bays formed
They are formed where there are alternating bands of resistant and less resistant rock
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What are the 3 types of mass movement
Slides, Slumps, rockfalls
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How are caves, arches, stacks and stumps formed
Water gets into cracks and enlarges them forming a cave. The water errodes the headland around the cave to form an arch. The arch collapses to form a stack. Stack warn away to form a stump
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How are coves formed
When there are paralled bands of hard and soft rock. Hard rock along the coast with soft rock behind it
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What are the 4 processes of transportation
Traction, suspension, saltation, solution
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What is depostion
Dropping of material on the coast by the sea
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What are constructive waves
They have a low frequency and are low and long. Carry material up the coast and cause depostion
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How are beaches formed
Formed by depostion and constructive waves which drop material like sand and shingle
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How are spits and bars formed
Formed by long shore drift until the shelterd area becomes a recurved end. The sheltered area is a bar and the recurved end is a spit
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Dorset coast - errosion
Durdle Door, Lulworth cove, Chesil beach, Old Harry and his wife
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Global warming
Melting ice causes waters in the oceans to rise. Increased global temperature causes the oceans to get warmer and expand
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Four coastal areas at risk from flooding and errosion
Economic, social, political and environmental
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Effects of coastal errosion
1.8 meters per year. It effects peoples lives and environment. Lives - destroy houses, businesses, property prices. Environment - seawater destroys natural lagoons and habitats as it is salty
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Hard engineering
Sea wall , groynes, breakwaters, rock armour. Good because they are strong, last. Bad - cost
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Soft engineering
Beach nourishment, Dune regeneration, Marsh creation, Managed retreat. Good - cheap. Bad - dont last
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Conflicts between land use and conservation
Some human activities dont use the environment sustainably. Walking on sand dunes. We cause damage. Conservation like the National Trust develop a safe walkway so that we can still walk but not cause damage
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Other cards in this set

Card 2

Front

What is chemical weathering

Back

Its the breakdown of rock by changing its chemical composition. Rain water has co2 in which makes a weak carbonic acid. This reacts with the rock

Card 3

Front

What are the four processes of errosion

Back

Preview of the front of card 3

Card 4

Front

What do destructive waves do

Back

Preview of the front of card 4

Card 5

Front

What is a wave cut notch

Back

Preview of the front of card 5
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