Geography

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  • Created by: Katie_
  • Created on: 17-02-14 12:30
Abrasion
This is the process by which the bed and banks are broken down by the rivers loads. The river throws these pebbles against the bed and banks, sometimes at high velocity
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Attrition
Material carried by the river collide into each other and so are smoothed and broken down into smaller parts
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Solution
This is the chemical action of river water. The acids in the water slowly dissolve the pebbles and the banks.
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Hydraulic Action
Where fast-flowing water is forced into cracks, breaking up the river bed and bank over time
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Suspension
Tiny particles of sediment are suspended in the rivers current
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Solution
Dissolved chemicals are carried along in solution, invisible to the eye
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Saltation
Small stones are picked up and then dropped again
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Traction
Large stones are dragged along the river bed
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Source
The beginning or start of a river
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Mouth
The point where the river comes to the end, usually when entering a sea
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Erosion
Breaking down rock particles carried downstream by the river. Also, the wearing away of rock and soil found along the river bed
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Meander
As the river erodes laterally to the right side then the left side, it forms large bends, and then horseshoe-like loops called meanders.
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Interlocking Spurs
Occurs in the upper course of a river in which vertical erosion is the dominant force determining the rivers course.
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Biological weathering
Animals and plants can wear away rocks
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Physical weathering
Caused by physical changes such as changes in temperature, freezing and thawing and the effects of wind, rain and waves
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Chemical weathering
– The weathering of rocks by chemicals. Rainwater is naturally slightly acidic as carbon dioxide from the air dissolves in it. Minerals in rocks may react with the rainwater causing it to be weathered.
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Welted perimeter
The amount of the channel which is in direct contact with the river
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Other cards in this set

Card 2

Front

Attrition

Back

Material carried by the river collide into each other and so are smoothed and broken down into smaller parts

Card 3

Front

Solution

Back

Preview of the front of card 3

Card 4

Front

Hydraulic Action

Back

Preview of the front of card 4

Card 5

Front

Suspension

Back

Preview of the front of card 5
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