Erosion

Question 1

Attrition

Answer 1

Boulders and other materials collide and break into smaller pieces

Highland areas

Question 2

Abrasion

Answer 2

Smaller particles carried in suspension rub against the bank of the river. Like a sand papering action.

Lowland- because all the particles are small enough to be carried

Question 3

Corrosion

Answer 3

Acids in the river dissolve rocks, such as limestone.

Any time during the river course

Question 4

Hydraulic action

Answer 4

The sheer force of the river dislodges particles from the river’s banks