Mystery #2Tier 2water / states
Why can you see your breath on a cold day?
On a cold morning you breathe out and a little cloud appears — but indoors, or in summer, your breath is invisible. You're breathing the same way every time. So why does the cloud only show up in the cold?
Your guess
What's your hunch — what makes your breath show up as a cloud only when it's cold?
Make a guess to unlock the hints and the answer.