At higher elevations, the boiling point of water decreases, due to the decrease in atmospheric pressure. As a result, what could be said about hard boiling an egg?
Answer
A
At higher elevations, it would take less time to hard boil an egg, because there is less atmospheric pressure.
B
At higher elevations, it would take longer to hard boil an egg, because there is a lower boiling point, so the egg is boiling in water at a lower temperature.
C
At higher elevations, it would take less time to hard boil an egg, because there is a lower boiling point. Therefore it would take less time to achieve the boiling point.
D
At higher elevations, it would take longer to hard boil an egg, because it would take longer to achieve the boiling point.
Explanation
At higher elevations, the lower atmospheric pressure makes water boil at a lower temperature. The egg is therefore cooked in cooler boiling water, so it takes longer to hard boil. Choice B gives this reason; the time it takes for water to reach its boiling point does not explain the longer cooking time.
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