River Processes

Question 1

Erosion

Answer 1

Erosion is the process that wears away the river bed and banks.

Question 2

Hydraulic action

Answer 2

This is the sheer power of the water as it smashes against the river banks. Air becomes trapped in the cracks of the river bank and bed also causes the rock to break apart.

Question 3

Abrasion

Answer 3

When pebbles grind along the river bank and bed in a sand-papering effect.

Question 4

Attrition

Answer 4

When rocks that the river is carrying knock against each other. They break apart to become smaller and more rounded.

Question 5

Solution

Answer 5

When the water dissolves certain types of rocks, eg limestone