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Question

Bholu thinks that he can dig a hole to centre of the Earth with just a shovel. He says he can do this by digging vertically down.

From which layer of the soil do you think Bholu will be unable to dig with his shovel?

A
Top soil
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B
Sub soil
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C
Bedrock
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D
Mantle
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Solution

The correct option is C Bedrock
The topmost layer is the decomposed remains of plants and animals. The layer below it is full of sand, soil and small rocks. Further below, the proportion of soil decreases and that of rock increases. The bedrock is the deepest layer and consists of large hard stones.
Therefore, Bholu cannot dig with a shovel; he would require a bigger and sharper machine-like drill.

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