Multiple choice general knowledge

What is the third most common gas found in the air we breathe?

  1. Nitrogen

  2. Oxygen

  3. CO2

  4. Argon
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Air composition is approximately 78% nitrogen, 21% oxygen, 0.93% argon, and 0.04% carbon dioxide. This makes argon the third most common gas in our atmosphere after nitrogen and oxygen. CO2 is often mistaken as more abundant due to its significance in climate discussions.

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