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Question
A man digging a pit found that he could dig with ease initially but digging became difficult as he went deeper. He could not dig beyond a depth of 5 feet. Provide a suitable scientific explanation.
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Solution
The soil surface has loose top soil which is easier to dig. At deeper layers, partially weathered rocks or bedrocks are present which are hard and make digging difficult.
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\[\boxed{\text{A}}\]\[\boxed{\text{T}}\]\[\boxed{\text{O}}\]\[\boxed{\text{N}}\]\[\boxed{\text{I}}\]\[\boxed{\text{E}}\]\[\boxed{\text{R}}\]\[\boxed{\text{P}}\]\[\boxed{\text{C}}\]\[\boxed{\text{L}}\]
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