chemical weathering

Question 1

chelation

Answer 1

weathering of rocks through the action of organic substances such as bacteria

Question 2

hydrolysis

Answer 2

occurs on rocks with feldspar such as granite. feldspar reacts with acid water and forms kaolin

Question 3

carbonation

Answer 3

dissolving of co2 in water, producing carbonic acid which reacts with calcium carbonate to produce soluble calcium bicarbonate

Question 4

hydration

Answer 4

minerals change when they absorb water. results in expansion and contraction which leads to increased stress. some shales and mudstones can expand by 1600% when clay minerals absorb water