quiz 22

Question 1

explain the formation of a spit

Answer 1

1.prevailing wind approaches the coast
2.swash carries sediment up the beach, backwash carries sediment down the beach
3. waves transport this sediment in an zig-zag pattern
4. there is a sudden change of coastline
5. waves lose energy and deposit sediment. this accumulates to form a spit
6. a change in wind direction causes hooked ends on the spit
7. behind a salt marsh forms

Question 2

Explain the formation of headlands and bays

Answer 2

1. prevailing wind changes direction of the wave making it move towards coastline
   2.Headlands and bays are found where there are alternating bands of hard and soft rock an discordant coastline
2. softer rock is eroded more faster than harder rock as its less resistant to erosion
3. the layers of hard rock stick out to sea because the soft rock is eroded more quicker its less resistant the layers, this is called a headland
4. the layers of softer rock with erode more quickly create a bay
   6.

Question 3

Explain the formation of a beach

Answer 3

1. 2 headlands shelter a bay with constructive waves
2. constructive waves deposit the sediment they are carrying because of their strong swash and weak backwash
   3.forming a beach

Question 4

Explain the formation of a wave cut platform

Answer 4

1. the high tide mark is the point where the sea and the base of the cliff meet, this the point when destructive waves erode
2. destructive waves erode the base of the cliff at the high tide mark bia hydraulic action and abrasion causing the formstion of a wave cut notch
3. destructive waves continue to erode via hydraulic action and abrasion widening the wave cut notch. This leads to the cliff above being unsupported so it collapses due to gravity
4. the cliff will retreat inland leaving behind a steep wave cut platform that is pitted due to abrasion by rocks from collapsed overhang