Coasts- Types Of Weathering

Question 1

Weathering

Answer 1

The breaking up of rocks

Question 3

Freeze thaw/ Frost shattering

Answer 3

• Water seeps into rock cracks
• When water freezes it expands rock 9% in volume
• Cracks enlarge and this process repeats and water freezes and thaws causing the rock to break

Question 4

Salt weathering

Answer 4

• A common type of weathering on the coast
• When sea water soaks into a rock, evaporation may occur
• Salt crystals are left behind and they grow causing the rock to crumble and weaken

Question 5

Chemical Weathering

Answer 5

• Rainwater is naturally acidic because CO2 (in air) reacts with rainwater to form carbonic acid
• This type of acid rain is weakly acidic and reacts slowly with minerals in rock

Question 6

Biological Weathering

Answer 6

• Caused by animals and plants wearing away rocks (e.g. burrowing and growing in cracks)

Question 7

Physical Weathering

Answer 7

• Caused by physical changes in temperature, freezing and thawing, and the effects of wind, rain and waves.