2B.4 - Marine erosion creates distinctive coastal landforms and contributes to coastal landscapes.

Question 1

What different types of waves are there?

Answer 1

Constructive and destructive

Question 2

What is a temporal scale?

Answer 2

Time scale

Question 3

What is a constructive wave?

Answer 3

A wave with a large swash and a small backwash.

Question 4

What is a destructive wave?

Answer 4

A wave with a small swash and a large backwash.

Question 5

How are the erosion processes influenced by wave type?

Answer 5

Constructive - more abrasion as harder swash.

Destructive - more attrition as more violent waves.

Question 6

Define lithology.

Answer 6

The characteristics of rocks.

Question 7

How does lithology affect the rate of erosion?

Answer 7

Igneous rocks -
very slow, because they have interlocking crystals.
Metamorphic rocks - Slow, because all the crystals are in one direction making them weak.
Sedimentary - fast, because they are geologically younger and have fractures and fissures.

Question 8

Examples of coastal landforms.

Answer 8

Wave cut notch, wave cut platform, cliffs, cave-arch-stack-stump.