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Weathering and Mass Wasting — Geography STD 11 Commerce / Arts — Question

Maharashtra BoardEnglish MediumSTD 11 Commerce / ArtsGeographyWeathering and Mass Wasting3 Marks
Question
Oxidation changes the size and colour of the rocks.
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Answer

Oxidation changes the size and colour of the rocks because-
  1. Oxygen in the air and water reacts with certain elements in the minerals inside the rock
  2. In this process, the minerals in the rock react with the oxygen present in the air or water.
  3. Metals, particularly iron and aluminium, commonly oxidize forming iron or aluminium oxides. It is also called rusting.
  4. These oxides are larger in volume than in the original rocks.
  5. The iron oxides are red in colour and aluminium oxides are yellow.
  6. Thus, oxidation changes size and colour of the rock.

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