7.1

Question 1

erosional coasts

Answer 1

-Erosional coasts: are formed by waves and other powerful forces that erode rock. an example is the 12 apostles.

Question 2

what is swash

Answer 2

swash is when a wave breaks it creates turbulence in the water.

Question 3

what is backwash

Answer 3

backwash is when the energy in the waves is gradually lost, and most of the water soaks into the sand.

Question 4

salt spray weathering

Answer 4

-salt spray weathering breaks up the surface of rock because the salt particles expand an contract as they dry out in the sun.

Question 5

the 2 types of erosion

Answer 5

• water: which occurs through waves and costal rivers that carry sediments.
• wind: which is very important in the formation of coastal dunes.

Question 6

5 main types of coastal erosion:

-Land based erosion

Answer 6

-water running from the land can also erode the costal environment

Question 7

5 main types of coastal erosion:

-Attrition

Answer 7

• when a large piece of rock falls away the waves gradually wear it down into smaller rock particles and sand.

Question 8

5 main types of coastal erosion:

-Corrosion/Solution

Answer 8

• when a chemical reaction between air, the salt in the sea water and the rock surface causes small particles of rock to disintegrate.

Acronym ASRs

Question 9

5 main types of coastal erosion:

-Wave Pounding

Answer 9

• when waves break against rocks they weaken the rock’s causing small pieces of rock to break away.

Question 10

5 main types of coastal erosion:

- Abrasion/ Corrasion

Answer 10

• when a wave breaks it throws sand, small rocks and sometimes large boulders against rocky coastlines to wear away the rock.

Question 11

what is deposition

Answer 11

deposition is when waves and currents move sand along the coast and deposit it in large piles.
it also creates beaches

Question 12

what is a longshore drift

Answer 12

A longshore drift runs parallel to the coastline carrying sediments that waves have eroded from beaches.

Question 13

depositional coasts

Answer 13

-Depositional coasts: are made up of eroded materials along the coast. an example is most western australian coastlines.

Question 14

plant weathering

Answer 14

-plant weathering breaks up rock by sending tiny roots into joints. ( cracks within the rock) {don’t need to write}

Question 15

animal weathering

Answer 15

-Animal weathering occurs when sea creatures attach themselves to rocks and the animals produce chemicals to attack the minerals in the rock.