Coastal erosion and deposition

Question 1

What is abrasion?

Answer 1

Waves transport materials and the pebbles grind along a rock platform gradually wearing it away

Question 2

What is hydraulic action?

Answer 2

as waves approach the coast they trap air and force it into gaps in the cliff eventually thus weakens the rock

Question 3

What is attrition?

Answer 3

Waves cause the rocks to crash against eachother breaking them down into smaller rounder pieces

Question 4

What is corrosion?

Answer 4

salts and acids in seawater dissolve the rock gradually over thousands of years

Question 5

What is solution?

Answer 5

when the water dissolves certain types of rock eg limestone

Question 6

What is deposition?

Answer 6

when the sea looses energy, it drops the material it has been carrying. This is known as deposition

Question 7

Factors leading to deposition

Answer 7

waves slow down and loose energy
shallow water
sheltered areas eg bays
little or no wind