weathering

Question 1

what is weathering

Answer 1

involves the decomposition of disintegration of rock in its original place at or close to the ground surface

Question 2

different types of weathering

Answer 2

biological
chemical
mechanical

Question 3

what is biological weathering

Answer 3

involves living organisms such as nesting birds, burrowing rabbits and plant roots

Question 4

chemical weathering

Answer 4

carbonation
hydrolysis
oxidation

Question 5

mechanical weathering

Answer 5

freeze-thaw

saltweathering.

Question 6

what is carbonation

Answer 6

CO2 dissolved in rainwater forms a week carbonic acid. this reacts with calcium carbonate (limestone and chalk) to make bicarbonate , which is soluble and can be carried away by water

Question 7

what is oxidisation

Answer 7

oxygen dissolved in water reacts with iron-rich minerals causing rocks to crumble.

Question 8

what is hydrolysis

Answer 8

acidic rain water reacts with minerals in granite causing it to crumble

Question 9

what is saltweathering

Answer 9

crystals of salt grows in cracks and holes, expanding to cause rock fragments to flake away