Mystery #1Tier 1gases in air
What is the air really made of, beyond just the oxygen we breathe?
You breathe it in every second, yet you never see it. Most people would guess the air is basically oxygen, the gas that keeps you alive. But air is really a mixture of several gases, and oxygen is only a slice of it. So what makes up all the rest?
Your guess
What's your hunch? If air is more than just oxygen, what do you think makes up most of it?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.