Lesson 5

Question 1

Destructive wave characteristics? (4)

Answer 1

stronger backwash than swash
13-15 per minuite
Remove sediment from beach
Crest moves forward and downwards at an angle of 120d

Question 2

What direction is water directed with destructive waves?

Answer 2

downwards

Question 3

Where is the water deepest in destructive waves?

Answer 3

nearshore

Question 4

Constructive waves characteristics? (4)

Answer 4

Stronger swash than backwash
Sediment moved up beach making it wider
6-8 waves per minute - elliptical
Energy reduced, water filters (peculates) through sand

Question 5

Where are constructive waves found?

Answer 5

sloping sandy beaches

Question 6

Where are destructive waves found?

Answer 6

steep shingle beach

Question 7

What direction is water directed with constructive waves?

Answer 7

forwards

Question 8

Where is the water shallowest in destructive waves?

Answer 8

nearshore

Question 9

How do salt marshes stabilize the coastline? (2)

Answer 9

absorb coastal flooding

plants change conditions, trap more sediment, colonise

Question 10

How do sand dunes stabilize the coastline? (2)

Answer 10

Plants colonise

take impact of storm