WONDER #1489: What Is Air Made of?

Question 1 of 3

Which gas makes up most of the air around you?

  1. Nitrogen
  2. Oxygen
  3. Water vapor
  4. Argon

Question 2 of 3

Which element in air is most important to human survival?

  1. Nitrogen
  2. Oxygen
  3. Water vapor
  4. Argon

Question 3 of 3

Other than oxygen and nitrogen, all the other trace elements make up about what percentage of air?

  1. 50%
  2. 99%
  3. 1%
  4. 25%

Check your answers online at https://wonderopolis.org/wonder/What-Is-Air-Made-of.