Paper 1 - weathering and erosion

Question 1

weathering

Answer 1

break down of rocks where they are

Question 2

erosion

Answer 2

rocks are broken down and carried away

Question 3

mechanical weathering

Answer 3

breakdown of rock without changing its chemical composition e.g freeze thaw weathering

Question 4

chemical weathering

Answer 4

break down of rock by changing its chemical composition

e.g carbonation weathing

Question 5

when does mass movement happen? (falling of rocks down a slope)

Answer 5

when the force of gravity acting on the slopw is greater than the force supporting it

Question 6

mass movement causes…

Answer 6

rapid retreat

more likely to happen when material is full of water and makes material heavier

Question 7

three types of mass movement

Answer 7

slides - material shifts in a straight line

slumps - material shifts with a rotation

rockfalls - material breaks up and falls down slop

Question 8

hydraulic power

Answer 8

wave crashes against rock and compresses the air in the cracks

this puts pressure on the rocks

repeated compression widens the cracks forcing more off

Question 9

abrasion

Answer 9

eroded particles scrape and rub against rock, removing small pieces

Question 10

attrition

Answer 10

eroded particles in the water smash into each other and break into smaller fragments

Question 11

destructive waves

Answer 11

waves that carry out erosional processes

they have a high frequency and are high and steep

their backwash is more powerful than their swash meaning material is removed

Question 12

swash

Answer 12

movement of water up a beacj