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Landforms — Geography STD 11 Arts — Question

Gujarat BoardEnglish MediumSTD 11 ArtsGeographyLandforms5 Marks
Question
What is physical weathering ? Describe its types.
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Answer

  • Rock breaking is caused by temperature, rain, snow, vegetation and human activities.
  • In it their physical form changes.
  • But there is no change in the chemical composition, so it is called physical erosion.
  • Temperature: Exposed rocks are heated by the heat of the sun.
  • Therefore, their size increases as they spread.
  • At night the temperature drops.
  • Thus, this action is continuous.
  • The result is cracks in the rocks.
  • Over time, small and large pieces of rock begin to form.
  • Which is called room separation.
  • Such erosion is especially common on basalt rocks.
  • Minerals differ in their ability to transmit heat and shrink from cold, so dispersion and contraction are uneven,
releasing small and large particles from rocks.
  • It is seen as particle separation.
  • In rocks that are arranged one layer above another, one layer after another separates which is called layer
separation.
  • This type of fission is commonly found in basalt rocks.

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