What is air made of?

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Study for the AAMI Certified Associate in Biomedical Technology Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What is air made of?

Explanation:
Air is a mixture of gases, with nitrogen and oxygen making up the vast majority. In dry air at sea level, nitrogen is about 79% and oxygen about 21% by volume. The remaining roughly 1% consists of argon, carbon dioxide, neon, helium, methane, krypton, hydrogen, xenon, and other trace gases, with water vapor amount depending on humidity. So the defining composition is the dominant nitrogen and oxygen, not the other gases in much smaller amounts.

Air is a mixture of gases, with nitrogen and oxygen making up the vast majority. In dry air at sea level, nitrogen is about 79% and oxygen about 21% by volume. The remaining roughly 1% consists of argon, carbon dioxide, neon, helium, methane, krypton, hydrogen, xenon, and other trace gases, with water vapor amount depending on humidity. So the defining composition is the dominant nitrogen and oxygen, not the other gases in much smaller amounts.

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