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Rocks and Minerals

Which process...

Question

Which process causes rocks to crack and break?

A

Continuous variation in temperature

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B

Re-crystallisation

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C

The buried remains of dead animals

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D

Crystallisation

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Solution

The correct option is A Continuous variation in temperature
Rocks tend to break and crack because of continuous variation in the temperature of the environment. Additionally, water percolating through rocks dissolves water-soluble minerals which contributes further to the weathering of rocks.

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(i)‌ Rate of weathering is determined by the climatic conditions of a given place.‌
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(iii)‌ The roots of plants which grow nearby penetrate the rocks and crack them.
(iv)‌ Stress caused due to crystallisation of salts on rock surface causes weathering of rock.

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