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ICSE Class 9 Geography Question 8 of 15

Weathering — Question 6

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Question 6

What is known as oxidation? What effect does it have on the colour of rocks?

Answer

Oxidation means reaction of minerals in rocks to atmospheric oxygen.

When the atmospheric oxygen comes in contact with iron-compounds in rocks, the iron starts rusting or crumbling. The colour of the rock changes to red, yellow or brown.