Chemical weathering

Question 1

Where does it occur?

Answer 1

where rocks are exposed to air and moisture so chemical processes break down the rocks

Question 2

What is the main chemical process?

Answer 2

solution as it combines with erosion

Question 3

What does oxidation cause?

Answer 3

the rocks to disintegrate when oxygen dissolved in water reacts with rock minerals

Question 4

What does oxidation form?

Answer 4

oxides and hydroxides

Question 5

What does oxidation especially affect?

Answer 5

ferrous, iron-rich rocks

Question 6

What does hydration make rocks?

Answer 6

more susceptible to further chemical weathering

Question 7

What does hydration involve?

Answer 7

physical addition of water to minerals in the rock

Question 8

What does hydration cause?

Answer 8

rocks to expand, creating stress causing the rock to disintegrate

Question 9

What is hydrolysis?

Answer 9

where mildly acidic water reacts with minerals in the rock to create clays and dissolvable salts - degrading the rock

Question 10

When does carbonation occur?

Answer 10

when co2 dissolved in rainwater makes a weak carbonic acid, which reacts with calcium carbonate to form calcium bicarbonate which dissolves easily in water

Question 11

Where is carbonation more effective?

Answer 11

locations with cooler temperatures as this increases the amount of carbon dioxide dissolved in water