4.3 B

Question 1

3 Factors affecting wave energy?

Answer 1

1. How long the wind has been blowing
2. The strength of the wind
3. How far the wave has travelled (the fetch)

Question 2

What are the characteristics of a destructive wave?

Answer 2

1. Destructive waves are created in storm conditions.
2. They are created from big, strong waves when the wind is powerful and has been blowing for a long time.
3. They occur when wave energy is high and the wave has travelled over a long fetch.
4. They tend to erode the coast.
5. They have a stronger backwash than swash.
6. They have a short wave length and are high and steep.

Question 3

ABRASION DEFINITION

Answer 3

Abrasion:Bits of rock and sand in waves grind down cliff surfaces like sandpaper.

Question 4

Hydraulic Action Definition

Answer 4

Hydraulic action:Air may become trapped in joints and cracks on a cliff face.When a wave breaks, the trapped air is compressed which weakens the cliff and causes erosion.

Question 5

Attrition Definition

Answer 5

Attrition:Waves smash rocks and pebbles on the shore into each other, and they break and become smoother.

Question 6

Solution definition

Answer 6

Solution:Acids contained in sea water will dissolve some types of rock such as chalk or limestone.