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Upper Valley
The upper valley is a steep v shaped valley with steep sides and is a narrow and shallow channel
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Middle Valley
Gently sloping valley sides with a deeper and wilder channel
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Lower Valley
The lower valley is a gentle very wide and almost flat valley. The channel is very wide and deep
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Vertical erosion
This deepens the river valley making it v shaped, it's dominant in the upper course of the river
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Lateral erosion
this widens the river valley and is dominant in the middle and lower courses
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Hydraulic action
The force of the water breaks rock particles away from the river channel
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Abrasion
Eroded rocks picked up by the river scrape and rub against the channel wearing it away. Most erosion happens by abrasion
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Solution
River water dissolves some types of rock like chalk and limestone
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Attrition
Eroded rocks picked up by the river smash into each other and break into smaller fragments, their edges also get rounded off as they rub together.
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Other cards in this set

Card 2

Front

Middle Valley

Back

Gently sloping valley sides with a deeper and wilder channel

Card 3

Front

Lower Valley

Back

Preview of the front of card 3

Card 4

Front

Vertical erosion

Back

Preview of the front of card 4

Card 5

Front

Lateral erosion

Back

Preview of the front of card 5
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