Erosion

Question 1

What is erosion?

Answer 1

The erosion definition is the degredation of a surface due to an external condition such as wind or water flow.

Question 2

What is hydraulic action?

process of erosion

Answer 2

The force of the river water colliding with rocks breaks rock particles away from the river channel.

Rubed against the channel

Question 3

What is abrasion?

process of erosion

Answer 3

Eroded rocks picked up by the river scrape and rub against the channel, wearing it away.
Most erosion happens by abrasion

Question 4

What is attrition?

process of transportaion

Answer 4

Eroded rocks picked up by the river crash into each other and break into smaller fragments. Their edges also get rounded off as they rub togather.

The further material travels, the more it is eroded - attrition causes particle size to decrease from a rivers source to mouth

Question 5

What is solution?

process of erosion

Transportation

Answer 5

River water dissolves some types of rock (limestone, chalk) in water and carried along

Question 6

Suspention

process of transportaion

Answer 6

small particles like slit or clay are carried along by the river flow

Question 7

Saltation

process of transportation

Answer 7

Pebble-sized particles are bounced along the river bed by the force of the water

Question 8

Traction

process of transportation

Answer 8

Large particles or rocks like boulders are pushed along the river bed by the force of the water.

Question 9

What is deposition?

Answer 9

When a river drops the material it’s transporting
It occurs when a river loses velocity and energy

Question 10

Why do rivers slow down?

Answer 10

The volume of water fall
The amount of eroded material increases
The water is shallower
The river reaches it’s mouth