Multiple choice

Nitrogen gas makes up ____% of our atmosphere.

  1. 78

  2. 21

  3. 0.1

  4. 0.03
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Earth’s relatively thin atmosphere primarily consists of a mixture of nitrogen (78%) and oxygen (21%) gases. The remaining 1% contains several inactive gases (i.e. argon, neon, helium, hydrogen, and xenon) and several other gases that vary in concentration (i.e. water vapour, carbon dioxide, methane, nitrous oxide, ozone, and chlorofluorocarbons).

Keep practicing — related questions