Mystery #1Tier 2weather / water
Why does it rain?
Water falls out of the sky by the bucketload, yet the sky looks empty, and the water had to get up there somehow first. Where does all that rain come from, and what finally makes it fall?

Your guess
What's your hunch about how water gets up into the sky, and what makes it suddenly come back down as rain?
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.