Processes of coastal erosion

Question 1

Hydraulic action

Answer 1

Pounding waves compress trapped air in the rocks creating an explosive blast which weakens and loosens rock fragments (2 marks)

Question 2

Abrasion/corrasion

Answer 2

Rock fragments thrown against the headland breaking down the cliff face, wearing away the rock (2 marks)

Question 3

Solution/corrosion

Answer 3

Carbonic acid in sea water dissolves rock (2 marks)

Question 4

Attrition

Answer 4

Rock fragments slowly being ground down by friction from wave action into smaller and rounder pieces which can be used as an abrasive material. (2 marks)