Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Q: Question: A rounded hollow carved in the side of a mountain by a glacier is known as? Answer: a cirque

A: A cirque is a rounded hollow carved in the side of a mountain by a glacier. The highest cliff of a cirque is called the headwall.
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Q: Question: Where is the pressure of gases in the atmosphere at its greatest? Answer: sea level

A: The pressure of gases in the atmosphere is greatest at sea level and decreases rapidly as altitude increases.
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Q: Question: What consists of a nitrogen atom bonded to some combination of carbons and hydrogens? Answer: an amine

A:
An amine consists of a nitrogen atom bonded to some combination of carbons and hydrogens.
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