yes it is reversible
Yes, because when it's blown up, it's still gunpowder. Blowing is caused by a chemical reaction.
yes
That would be little old Helium. Hydrogen makes baloons rise even faster, but has the unfortunate disadvantage of blowing up.
you get a pin and jab itWhat you need to do is get a bottle and fill it with sugar and yeast and warm water. then let it stay like that for 2 to 3 hours. Or you could just blow it up using your mouth- much simpler! Or use a ballon pump
No, but it can be broken up to be similar. : )
it changes form
yes you can
Put the balloon in the bottle with the blowing up part out and blow it up in the bottle.
Blowing up a balloon.
Healum and water defanatly a pump
There are machines you can buy for blowing up balloons; check with a local party store.
your get someone whipped cream and mix it in with water and before blowing the balloon up you have to but the whit water in.
Assuming you meant expanding, which means growing larger. Blowing up a balloon, for instance, causes the balloon to expand.
Blowing up a balloon with a helium tank, then blowing up a different balloon with your mouth will make a difference in the outcome of your experiment. It'll most likely give you more sources of error.
a hot air balloon works when the hot air blowing from the bottom pushes up the balloon which lifts it up into the sky where it moves in the direction where the wind blows .
Do the experiment and find out yourself :)
No. Kissing em is more fun XD