Rivers

Question 1

What is corrasion/ abrasion

Answer 1

The grinding of rock fragments, carried by a river, against the beds and banks of that river
Causes the river to deepen and widen
Most powerful during a flood

Question 2

What is attrition

Answer 2

The collision of rock fragments suspended in the water against each other
Rock particles broken into smaller pieces and become smoother

Question 3

What is Solution/corrosion

Answer 3

River water chemically reacts with soluble minerals in rocks dissolving them

Question 4

What is hydraulic action

Answer 4

Form of erosion that is caused by the power of moving water
Under cuts riverbank on outside of meander
Force air into cracks

Question 5

4 transportation methods

Answer 5

Traction
Saltation
Suspension
Solution

Question 6

What is traction

Answer 6

Boulders and pebbles rolled along riverbed at times of high discharge

Question 7

What is saltation

Answer 7

Sand sized particles are bounced along the river bed by flow of water

Question 8

What is suspension

Answer 8

Fine clay and sand sized particles are carried along water even at low discharges

Question 9

What is solution

Answer 9

Some minerals dissolve in water such as calcium carbonate

This takes very little energy

Question 10

4 times deposition is most likely

Answer 10

River enters a lake or the sea
Floods onto flood plain
Are of shallow water
Load increased suddenly e.g. landslide