quiz 20

Question 1

Explain why destructive waves cause coastal erosion

Answer 1

their strong backwash removes sediment from the coast

Question 2

Explain why constructive waves can build up a beach

Answer 2

more sediment is deposited through the strong action of the swash then is removed by the weaker action of the backwash

Question 3

What are the main 2 types of wave

Answer 3

constructive and destructive

Question 4

At what angle does backwash occur and what causes it?

Answer 4

at a right angle to the direction of the beach due to gravity

Question 5

What determines the strength of the wave

Answer 5

The fetch

Question 6

Give 3 characteristics of destructive waves

Answer 6

wave crest is high,weak swash and strong backwash

Question 7

Explain why destructive waves cause coastal erosion

Answer 7

their strong backwash removes sediment of the coast

Question 8

What is the difference between swash and backwash

Answer 8

swash is the movement of wave up the beach,backwash is the movement of the wave down the beach

Question 9

Give 3 charcateristics of constructive waves

Answer 9

wave crest is low
strong swash
weak backwash

Question 10

What causes waves to form

Answer 10

the wind blowing over the water

Question 11

At what angle does swash occur and what occurs it?

Answer 11

swash is driven by the prevailing wind and it travels in the same direction