Paper 1 - coastal landforms caused by deposition

Question 1

where are beaches found

Answer 1

between the high water mark and the low water mark

formed by constructive waves depositing sand and shingle

Question 2

sand beaches

Answer 2

flat and wide - backwash can move particles down the beach creating a gentle slope

Question 3

shingle beaches

Answer 3

steep and narrow - weak backwash cant move them down the beach so shingle particles build up

Question 4

spits

Answer 4

form at sharp bends in the coast line

longshore drift transports sand and shingle past the bend and deposits it in the sea

strong winds and waves can curve the end

the sheltered area behind the spit is protected from waves so lots of material accumulates so plants grow there and can become a mud flat or salt marsh

Question 5

bars

Answer 5

formed when a spit joins two headlands togethor

the bar cuts off the bay so a lagoon forms

Question 6

sand dunes

Answer 6

sand dunes are formed when sand deposited from longshore drift is moved up the beach by wind

obstacles cause wind speed to decrease so sand is deposited so the sand is then colonised by plants and grasses which stabilize the sand

the older dunes migrate inland as newer embryo ones are formed