Weathering

Question 1

Freeze thaw

Answer 1

water gets into well jointed rocks-freezes-expands by 10%-pressure of around 2100 kg/cm (squared£ shatters rock

Question 2

carbonation

Answer 2

chemical weathering process: dissolves calcium carbonate in limestones. carbon dioxide dissolved in water forms a weak carbonic acid which when reacts with calcium carbonate=bicarbonate=dissolves