coastal landforms and landscapes (marine erosion)

Question 1

Fetch

Answer 1

Uninterrupted distance across water over which wind blows. Distance over which waves able to grow in size

Question 2

What are waves caused by?

Answer 2

Friction between wind and water; directly influence the three Marine processes of erosion, trasport and deposition

Question 3

What determines wave size and strength?

Answer 3

Strength of wind (fetch) length of time wind blows for, water depth and wage fetch

Question 4

2 types of wave

Answer 4

Constructive and destructive

Question 5

Features of constructive waves

Answer 5

Low in height and long in length
Spilling waves
Strong stash and weak backwash
Deposit it’s sediment on beach

Question 6

Features of destructive waves

Answer 6

High and short in wavelength
Plunging waves
Weak smash and strong backwash
Erodes beach

Question 7

Beach morphology

Answer 7

Strongly conditioned but nature of prevailing waves. Wave conditions fluctuate over time and bring with them changes to beach morphology

Question 8

Swash

Answer 8

Flow of seawater up beach as wave breaks

Question 9

Backwash

Answer 9

Return flow of seawater back down beach to meet the next incoming wave

Question 10

4 diagnostic beach features of prevailing wind conditions

Answer 10

Storm beach, berms, cusps, offshore bars

Question 11

Features of a storm beach

Answer 11

Caused by constructive waves during stormy weather

Question 12

Features of berms

Answer 12

Small ridges created by constructive waves during relatively calm weather

Question 13

Features of cusps

Answer 13

Product of gentle destructive waves eroding berms

Question 14

Features of offshore bars

Answer 14

Formed by persistent destrictive waves