quiz 14

Question 1

Give 3 characteristics of constructive waves

Answer 1

Wave crest is low
Strong wash
Weak backwash

Question 2

What determines the strength of a wave?

Answer 2

The fetch( the distance the wind can blow the wave across)

Question 3

What causes waves to form?

Answer 3

The wind blowing over the water

Question 4

Give 3 characteristics of destructive waves

Answer 4

Wave crest is high
Weak swash
Strong backwash

Question 5

Explain why constructive waves can build beaches up

Answer 5

More sediment is deposited through the strong action of the swash than is removed by the weaker action of the backwash

Question 6

What is the relationship between fetch and wave power?

Answer 6

The greater the fetch, the greater the power of the wave

Question 7

Explain why destructive waves cause coastal erosion

Answer 7

Their strong backwash removes sediment from the coast

Question 8

At what angle does backwash occur and what causes it?

Answer 8

At a right angle to the direction of the beach, as it is caused by gravity

Question 9

What is the difference between swash and backwash?

Answer 9

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

Question 10

What are the 2 main types of wave?

Answer 10

Constructive and destructive

Question 11

At what angle does wash occur and what causes it?

Answer 11

Swash is driven by the prevailing wind, and travels in the same direction