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Geography ch 3 - Exogenetic Movements Part 1 — Social Studies STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9Social StudiesGeography ch 3 - Exogenetic Movements Part 12 Marks
Question
 How does biological weathering occur?
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Answer

  • It is the process by which rocks are broken into small fragments and fine particles due to the action of plants, animals and human beings.
  • The roots of the plants enter the points and ! cracks of the rocks in search of moisture.
  • As the roots grow bigger, they create tension in the rocks and start breaking them.
  • Animals such as mice, rabbits and rats dig I holes, anthills etc. and weaken the rock, which makes them loose and break into pieces.
  • Besides these, algae, moss1, lichen2, other flora grow in the rocks. They also help in weathering.
  • Thus, the weathering caused by living organisms is called biological weathering,

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