Changing River Shape Flashcards

(17 cards)

1
Q

What does changing river shape mean

A

How a river changes from source to mouth

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2
Q

How does the river change from source to mouth

A

It becomes wider deeper and slower

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3
Q

What is the long profile of a river

A

The change in height of a river from source to mouth

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4
Q

What is the gradient like near the source

A

Very steep

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5
Q

What type of erosion dominates near the source

A

Vertical erosion

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6
Q

What landform is created by vertical erosion

A

V shaped valleys

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7
Q

What is the valley shape like in the upper course

A

Narrow and steep sided

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8
Q

What happens to the river channel in the middle course

A

It becomes wider and deeper

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9
Q

What type of erosion dominates in the middle course

A

Lateral erosion

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10
Q

What landform forms due to lateral erosion

A

Meanders

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11
Q

What happens on the outside of a meander

A

Fast flow causes erosion

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12
Q

What happens on the inside of a meander

A

Slow flow causes deposition

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13
Q

What is the river shape like in the lower course

A

Very wide deep and flat

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14
Q

What landform forms in the lower course

A

Floodplains and levees

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15
Q

Why does deposition increase downstream

A

The river loses energy

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16
Q

What happens to sediment downstream

A

It becomes smaller and smoother due to attrition

17
Q

Why does the river slow down downstream

A

The gradient becomes gentler