Sand dunes

Question 1

Stage 1 formation of a sand dune

Answer 1

sand deposited by the longshore drift is moved up the beach by wind

Question 2

Stage 2 formation of a sand dune

Answer 2

Sand trapped by driftwood or berms is colonised by plants and grasses

Question 3

Stage 3 formation of a sand dune

Answer 3

Vegetation stabilises the sand and encourages more sand to accumulate there, forming embryo dunes