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Question
A student assumes that he can dig a hole to the centre of the Earth by digging vertically down with a shovel. From which layer of the soil would the student be unable to dig further?
A student assumes that he can dig a hole to the centre of the Earth by digging vertically down with a shovel. From which layer of the soil would the student be unable to dig further?
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Solution
The correct option is D Bedrock
The topmost layer is the decomposed remains of plants and animals. The layer below is full of sand, soil, and small rocks. Further below, the proportion of soil decreases and that of rock increases. Bedrock is the deepest layer and consists of large hard stones.
Therefore, the student cannot bedrock with a shovel. In digging the bedrock, the student would require a bigger and sharper drill.
The topmost layer is the decomposed remains of plants and animals. The layer below is full of sand, soil, and small rocks. Further below, the proportion of soil decreases and that of rock increases. Bedrock is the deepest layer and consists of large hard stones.
Therefore, the student cannot bedrock with a shovel. In digging the bedrock, the student would require a bigger and sharper drill.
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