Systems and processes - weathering and erosion 3.1.3.2 - Flashcards in A Level and IB Geography

Created by: teese
Created on: 04-04-22 14:55

What is the definition of weathering?

The breakdown or disintegration of rock in situ at or close to the ground surface

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Why is weathering important in the coastal system?

Rocks are weakened and loosened by weathering. The fallen material then becomes useful for marine processes like erosion, transportation and deposition.

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Name 2 places on the planet where weathering plays a bigger part in shaping landforms at coasts than marine processes.

The Mediterranean
South East Africa

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Name 3 forms of mechanical weathering

wetting and drying
freeze thaw
salt crystallisation
pressure release

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Name 3 types of chemical weathering

carbonation
hydration
hydrolysis
oxidation

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What is the definition of abrasion?

Where bits of rock are picked up by the waves and hurled at the cliffs, wearing them away over time.

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What is the definition of hydraulic action?

Water is pushed into cracks in the cliff face and then forced out causes the rocks to be worn away over time.

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What rock type is particularly susceptible to solution?

limestone

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What happens during attrition?

Material suspended in the water hit against each other, making it rounder and smaller over time.

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What processes happen during cavitation?

1) air bubbles are forced into cracks in the rock
2) pressure compresses them forcing them into solution
3) As the wave retreats, the pressure is released and the air comes out of solution
4) This causes micro detonations in the cracks which breaks down t

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Describe the 2 types of solution

1)
It's a form of weathering
Calcium carbonate in rocks is dissolved by fresh water
2)
Evaporation of salts in water causes crystals to form on rocks
The cracks widen eventually breaking down the rock

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Other cards in this set

Card 2

Front

Why is weathering important in the coastal system?

Back

Rocks are weakened and loosened by weathering. The fallen material then becomes useful for marine processes like erosion, transportation and deposition.

Card 3

Front

Name 2 places on the planet where weathering plays a bigger part in shaping landforms at coasts than marine processes.

Back

Card 4

Front

Name 3 forms of mechanical weathering

Back

Card 5

Front

Name 3 types of chemical weathering

Back

View more cards

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Systems and processes - weathering and erosion 3.1.3.2