River Erosion

Question 1

Abrasion

Answer 1

The wearing away of the bed and bank by the load of a river

Question 2

Attrition

Answer 2

Rocks smashing against eachother to break into smaller, smoother and rounder particles.

Question 3

Hydraulic action

Answer 3

The force of air and water on the sides of the rivers and in cracks

Question 4

Solution

Answer 4

Naturally occuring carbonic acid removing chemical ions and carrying in water

   - Especially calcium
              - chalk
              - limestone

Question 5

List factors of erosion (6)

Answer 5

PH
Load
Geology
Gradient
Velocity 
Human impact

Question 6

Why is load a factor?

Answer 6

The heavier and sharper the load, the greater the potential for erosion.

Question 7

Why is velocity a factor?

Answer 7

The greater the velocity, the greater the potential for erosion

Question 8

Why is geology a factor?

Answer 8

Soft rocks such as sand and chalk are easily eroded

Igneous rocks are not as easily as eroded.

Question 9

Why is PH a factor?

Answer 9

Rates of solution are increased when water is more acidic.

Question 10

Why is human impact a factor?

Answer 10

Deforestation, dams and bridges interfere with natural flow of water ususally end up increasing rate of erosion