Question 1 of 10 - What's in the air?

You are surrounded by gas, a gas called air. What are the three main components of the air?
(Values shown are approximate and do not allow for trace gases)

78% Nitrogen, 21% Oxygen, 1% Carbon Dioxide
25% Oxygen, 70% Nitrogen, 5% Carbon Dioxide
1% Argon, 78% Nitrogen, 21% Oxygen
21% Oxygen, 78% Nitrogen, 1% Helium
None of the above

 

 

Sorry that was incorrect. There's approximately 1% Argon, 78% Nitrogen and 21% Oxygen in air.

That was correct. There's approximately 1% Argon, 78% Nitrogen and 21% Oxygen in air.

 


Trace gases make up the remaining components.

Please select an answer before proceeding
 

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