Multiple choice

After nitrogen and oxygen, which gas has the maximum concentration or percentage in our atmosphere?

  1. CO2

  2. Helium

  3. Argon

  4. Methane
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Earth's atmosphere is composed of approximately 78 percent nitrogen, 21 percent oxygen, and about 0.93 percent argon. Argon is the third most abundant gas.

Keep practicing — related questions