EQ2 4.3 C

Question 1

Explain how longshore drift works

Answer 1

The prevailing wind takes the wave up to the coast and stones get stuck through swash.

Question 2

Explain the formation of a spit

Answer 2

• longshore drift moves material along the coastline.
• when the coastline changes dramatically, sand starts to build up behind the headland.
• over time more and more material is added to the spit.
• the area behind the headland is sheltered and a salt marsh begins to form.

Question 3

Spit characteristics

Answer 3

A spit is long and thin with curved ends. It is made up of sand and grass and has a shallow bit of water behind the sand. It is also a development of a coastline.

Question 4

Explain how a beach forms

Answer 4

Longshore drift takes the wind up to the coast and the sediment that has been eroded from the coast is deposited on the beach because it gets stuck in the groins during swash.

Question 5

Compare characteristics of a spit and a bar

Answer 5

The it is growing across a bay which joins two headlands.

Question 6

Explain the formation of a bar

Answer 6

The bar is formed because the spit grows across a bay which joins up to headlands.

Question 7

Explain constructive waves

Answer 7

They are waves with low energy that leave different materials on a coast. The waves and the sea bed have friction when the wave gets close to the coast and this slows the wave down. The swash is more powerful then the backwash which means more material is left on the beach then brought back.

Question 8

What are lagoons?

Answer 8

A lagoon is an area of water dammed by the bar. This will gradually be filled up by deposition.

Question 9

Characteristics of a coastal bar and lagoon

Answer 9

Long, thin bar of sand.
Wind prevailing from a direction e.g. south west.
Behind the bar, there is a lagoon.
The headland
The longshore drift.

Question 10

How is sediment transported around the coastline of the uk?

Answer 10

The sediment is transferred all along the coastline. When a cliff is eroded, the sediment falls into the sea. It moves around the country. The direction it goes in depends on the dominant wind direction.