Geography- Coastal Zone

Created by: Harriet
Created on: 29-11-14 14:19

What is mechanical weathering?

The breakdown of rocks without changing its chemical composition.

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What is the process of chemical weathering?

1) rainwater is a weak carbonic acid as it has carbon dioxide dissolved in it. 2) carbonic acid reacts with rocks with calcium carbonate so the rocks are dissolved by rainwater.

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What is mass movement? Why does this happen?

Shifting of rocks and loose material down a slope. Happens when the force of gravity acting on a slope is greater than the force supporting it.

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Give an example of mass movement

slides - material shifts in a straight line OR slumps- material shifts with a rotation

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How do waves erode the coast by hydraulic power?

when the waves crash against the rock they compress the air in the cracks. The repeated pressure and compression on the rock widens the cracks and makes bits of rock break off.

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What waves are associated with coastal erosion?

Destructive waves

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How is a wave-cut platform formed?

Waves cauaing erosion at the foot of the cliff then cause a wave-cut notch which is enlarged as more erosion occurs. The rock above the notch becomes unstable and collapses and when this happens repeatedly the cliff is retreating.

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Are headlands made of more or less resistant rock?

More resistant rock

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Other cards in this set

Card 2

Front

What is the process of chemical weathering?

Back

1) rainwater is a weak carbonic acid as it has carbon dioxide dissolved in it. 2) carbonic acid reacts with rocks with calcium carbonate so the rocks are dissolved by rainwater.