nothing would happen because comets hit Jupiter when it is hot and it does not burn up it. if Jupiter was a a bit bigger it would start to glow.
nothing would happen
Our moon has no atmosphere to touch.
everyone would die
you would die the atmosphere would burn and than you would die
we would die
we would die
life would follow
it would start raining heavily
nothing
we can't use jupiters moons for anything because fistly we can not get out that far to reach Jupiters moon and if we could it would take thousands of years and Jupiters Moons would be to big to do anything with anyway. so the answer to What could Jupiter's moons be used for? is....Nothing.
There would be no air or oxygen for us to survive.
You can answer that question for yourself, quite easily, by simpleobservation, because the moon doesn't have an atmosphere.