Subaerial Processes

Question 1

What is erosion?

Answer 1

The breaking down and transportation of rock fragments.

Question 2

What are the four main types of erosion?

Answer 2

*remember ‘CASH’

C:orosion
A:ttrition
S:olution
H:ydraulic-action

Question 3

What is corrosion?

Answer 3

Loose rocks (sediment) are drifted by waves which crashes into cliffs (breaking parts away) and riverbanks (making the river wider).

Question 4

What is attrition?

Answer 4

Sediments which collide together, getting smaller and smoother until they turn into grit or sand.

Question 5

What is solution?

Answer 5

Acid contained in the water dissolves less resistant rocks such as limestone.

Question 6

What is hydraulic action?

Answer 6

The waters current falls into cracks in cliffs or riverbanks that are full of air. This compresses the air so the cracks get bigger.

Question 7

What is weathering?

Answer 7

The breaking down of rocks but the fragments stay in situ.

Question 8

What are the three main types of weathering?

Answer 8

*use acronym ‘Peanut Butter Cookies’ 😂

P:hysical weathering
B:iological weathering
C:hemical weathering

Question 9

What is physical weathering?

Answer 9

Also known as freeze-thaw weathering, physical weathering is where water get trapped in cracks in cliffs or riverbanks. The water will freeze and expand by 9%, and the cracks get bigger.

Question 10

What is biological weathering?

Answer 10

Animals and plants burrow into the rock, causing it to break up and erode.

Question 11

What is chemical weathering?

Answer 11

If a rain loud forms in the presence of CO2, acid rain is formed. This, and acid in the river or sea will cause erosion of the riverbank (making it wider) and the cliff.

Question 12

What is mass movement?

Answer 12

The movement of sediment or material downhill as a result of the force of gravity.

Question 13

What are the five main types of mass movement?

Answer 13

*use acronym ‘Swiftly Swam Fast Sean Robinson’ 😂

S:liding 
S:lumping
F:lows
S:oil-creep
R:ock-fall

Question 14

What is sliding?

Answer 14

A part of a riverbed or cliff will slide down to the bottom.

Question 15

What is slumping?

Answer 15

A part of a riverbed or cliff will slide halfway down and stay there.

Question 16

What is flows?

Answer 16

Where masses of rock or soil, usually mixed with water, flow down hill like a liquid.

Question 17

What is soil creep?

Answer 17

Where individual soil particles move slowly down a slope.

Question 18

What is rock fall?

Answer 18

Rocks fall from the riverbank or cliff, into the river or sea.

Question 19

Define subaerial process.

Answer 19

A subaerial process is a process in which a combination of factors such as erosion, weathering and mass movement, work together to create land forms.