Mystery #1Tier 2-3heat / energy
How does a fridge make the inside cold when there is no ice or snow in it?
Open the fridge and a wave of cool air rolls out over your feet. But there is no ice inside, no snow, no frozen block, nothing that is obviously cold at all. Everything looks perfectly ordinary. So where is all that cold actually coming from?
Your guess
What's your hunch? Where does the cold inside a fridge come from?
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.