Chemical weathering

Question 1

What are the three types of physical weathering?

Answer 1

1. Freeze-thaw
2. Salt crystallisation
3. Wetting and drying

Question 2

What are the three types of physical weathering?

1. Freeze____
2. ____crystallisation
3. Wetting and ____

Answer 2

1. Thaw
2. Salt
3. Drying

Question 3

True or false: Freeze-thaw is common in places where temperatures are above freezing

Answer 3

False

Question 4

Freeze-thaw weathering is common in places where temperature ___ between ___ and ___ freezing.

Answer 4

Fluctuates
Above
Below

Question 5

When water is frozen (regarding freeze-thaw weathering), it expands by almost ___%

Answer 5

10

Question 6

Salt crystallisation is when

• Crystals e.g ___ grow when
• Seawater that collects in the cracks of the cliff face ____
• As crystals grow, they exert ___ on the rock

Answer 6

Salts
Evaporates
Pressure

Question 7

Wetting and drying is the ___ and ___ of minerals that occurs when minerals get wet and then dry up.

Answer 7

Wetting

Drying