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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.
Take a packet of ENO powder. and soda a balloon (heart
the volume of air inside the balloon increases while the pressure of balloon decreases thus balloon inflates
yes you can
Put the balloon in the bottle with the blowing up part out and blow it up in the bottle.
it changes form
yes it is reversible
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 :)