Rank the following gases in order of their concentration in Earth’s atmosphere from smallest to greatest. Oxygen, Carbon Dioxide, Water Vapor, Nitrogen, Hydrogen

Hydrogen  

Carbon Dioxide

Water Vapor (assuming the air is not dry)

Oxygen

Nitrogen

Explanation:

We have to make the distinction between dry air and humid-air

Oxygen, Carbon Dioxide, Water Vapor, Nitrogen, Hydrogen

Hydrogen           0.000055%

Carbon Dioxide  0.413%

Oxygen             20.946%

Nitrogen           78.084%

The case of water vapor is quite variable and can increase up to 3% in some cases (lowering the participation of the other gases) but, it is near zero when the air is dry. Thus it their participation will be above Carbon Dioxide

the answers for the whole quick check is

1. b

2. b

3. a

4. c

5. b

6. a

7. d