River Erosion

Question 1

Attrition

Answer 1

• when the bed load itself is eroded when sediment particles knock against the bed or each other and break, becoming more rounded and smaller.

Question 2

Abrasion

Answer 2

• when large pieces of bedload material wear away the river banks and bed.

Question 3

Hydraulic action

Answer 3

• when the force of water erodes softer rock.

Question 4

Solution

Answer 4

• when acidic water erodes rock.