Weathering

• Weathering


  The breakdown or disintegration of rock in situ at or close to the ground surface. It's a subaerial process
• Physical weathering


  Occurs when rocks are broken down by physical factors like wind, water and temperature.
• Examples of physical weathering


  Freeze-thaw, wetting and drying, crystallisation and exfoliation
• Chemical Weathering


  Break down of rock because of interaction of air, water or acid with the chemical composition of the rock.
• Examples of chemical weathering

  Carbonation and Oxidation.
• Biological Weathering


  Breakdown of rock by plants, animals and micro-organisms.
• Examples of biological weathering

  Roots of plants (they expand in the cracks and make them bigger) and Burrowing animals.