Erosion

Question 1

What are the four types of erosion?

Answer 1

Hydraulic Action, Attrition, Abrasion and Solution

Question 2

Define ‘Hydraulic Action’

Answer 2

Hydraulic Action is where air becomes trapped in joint and cracks on a cliff face. When a wave breaks, the trapped air is then compressed and weakens the cliff face.

Question 3

What happens at Abrasion?

Answer 3

Abrasion is where bits of rock and sand in waves grind down the cliff surface like sandpaper.

Question 4

Define ‘Solution’

Answer 4

Solution is where acids contained in sea water will dissolve types of rock such as chalk or limestone.

Question 5

Define ‘Attrition’

Answer 5

This is where rock fragments carried by the sea knock against one another, causing them to become smaller and more rounded