What is the primary composition of air?

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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 the primary composition of air?

Explanation:
Air is dominated by two gases. By volume, about 78% is nitrogen and about 21% is oxygen, with the rest made up of trace amounts of other gases such as argon, carbon dioxide, neon, and others. The given option reflects these main constituents, nitrogen around 79% and oxygen around 21%, which is why it’s the correct choice. The other options list gases that exist only in small, trace amounts, not as the primary components.

Air is dominated by two gases. By volume, about 78% is nitrogen and about 21% is oxygen, with the rest made up of trace amounts of other gases such as argon, carbon dioxide, neon, and others. The given option reflects these main constituents, nitrogen around 79% and oxygen around 21%, which is why it’s the correct choice. The other options list gases that exist only in small, trace amounts, not as the primary components.

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