erosional processes

Question 1

hydraulic action

Answer 1

The force of the river against the banks can cause air to be trapped in cracks and crevices the pressure weakens the banks and gradually wears it away

Question 2

abrasion

Answer 2

rocks carried along by the river wear down the river bed and banks

Question 3

attrition

Answer 3

rocks being carried by the river smash together and break into smaller, rounder and larger particles

Question 4

solution

Answer 4

soluble particles are dissolved into the river