L4 River processes

Question 1

What is erosion?

Answer 1

Removal of material

Question 2

What is deposition?

Answer 2

Dropping of material

Question 3

Name the FOUR ways in which erosion happens in a river

Answer 3

1. Hydraulic action
2. Corrosion
3. Attrition
4. Abrasion

Question 4

What is hydraulic action?

Answer 4

Water from the river wears away the soil around the river

Question 5

What is corrosion?

Answer 5

Small particles dissolve in the river

Question 6

What is attrition?

Answer 6

Rocks being carried in the river smash together and break into smaller rocks

Question 7

What is abrasion?

Answer 7

Rocks in the river wear down the river bank/bed

Question 8

What is a river bed?

Answer 8

The bottom of the river

Question 9

What is a river bank?

Answer 9

The sides of a river

Question 10

Erosion in a river happens in two directions - what are they?

Answer 10

Vertical erosion (eroding down)

Lateral erosion (eroding sideways)

Question 11

Name the four types of river transportation

Answer 11

1. Solution
2. Suspension
3. Saltation
4. Traction

Question 12

For transportation: what is traction?

Answer 12

Large material rolling along the river bed

Question 13

For transportation: what is saltation

Answer 13

Smaller stones bounce along the river bed

Question 14

For transportation: what is suspension

Answer 14

Tiny, light particles float in the river

Question 15

For transportation: what is solution

Answer 15

Minerals dissolve in the water