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Weathering

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Published in: Geography
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this topic is from geography .this will be very useful information for upsc aspirants

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  1. WEATHERING
  2. WHAT IS WEATHERING ? ' Refers to disintegration and decay of rocks under the influence of weather ,such as temperature and humidity. ' No transportation of broken materials
  3. Types of weathering Mechanical weathering Chemical weathering ' Biological weathering
  4. Mechanical weathering 1) No change in the rock's chemical composition. Agents of mechanica/ weathering include: causes repeated expansion and contraction
  5. Other causes of mechanical weathering CAUSES OF MECHANICAL WATER WEATHERING WIND PEOPLE BURROWING BIG ROOTS OF PLANTS
  6. Plants root damage rocks Plants roots can crack rock
  7. Chemical weathering Two Types of Weatherinq Chemical Weathering — when substances in the rock go through chemical changes that weaken the rock and cause it to break (think of your bicycle rusting): acid rain, pollution, lichens, and mosses all cause chemical weathering. LtCHEN WORKS VERY SLOWLY TO BREAK DOWN GRANITE BOULDERS. This rain. is caused by acid
  8. Biological weathering Biological weathering Seed falls into crack. Rain causes seedling to grow. Roots force their way into cracks. As the roots grow they break up the rock. Burrowing animals also break up rock.
  9. Biological weathering BIOLOGICAL WEATHERING The breaking down of rock by plants and animals Usually through the growthof rOots or burrowing of animals

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