Mystery #4Tier 2gravity / mass / weight
Why would you weigh less on the Moon but still be made of exactly the same stuff?
On the Moon, astronauts bounce around as if they weigh almost nothing, taking giant floaty leaps. Yet they are the very same people, made of exactly the same amount of body, that they were back on Earth. Nothing was taken away from them. So why do they weigh so much less?

Your guess
What's your hunch: why are you lighter on the Moon when you're still all there?
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.