STEP 2: Insert the balloon into the water bottle and pull the neck of the balloon over the outside of the bottle. Describe the air, inside the empty water bottle, by its observable properties.

Warm air is lighter and less dense than cold air, so it has buoyancy and wants to rise. This experiment helps demonstrate that.

What was holding the air inside the balloon this time? The answer is: air (and water)! Most of the room in the bottle was taken up by water, with some air at the top.

Start your (balloon) engines! Learn how you can power a toy car with air--and a little knowledge of physics. Then challenge a friend to a race!

Water bottle Straw Balloon Water Something to seal the straw (duct tape, playdough, glue, etc.) How to set it up: To set this up you will need to poke a hole in the water bottle, in the middle to ...

The bottle flies off, leaving a trail of water behind it and probably soaking the person pumping too. Once the bottle is empty of water, its flight starts to slow.

No, not the kind of bottle rockets you used to light with a match and fire recklessly at your cousins. This rocket is made out discarded soda bottles and fueled with pressurized water.

All you need is a water bottle, a balloon, and a stick of lit incense. YouTuber Dave Hax demonstrates: Wanna make a bigger cannon? Visit The Kid Should See This for more a more challenging ...

Here are three different methods to make a rocket - water and air, soda and butane or liquid nitrogen and water.

Have you ever tried to blow up a balloon inside a bottle? It's easy if you use science. STEP 1: Insert a balloon into one of the empty water bottles and pull the neck of the balloon over the ...

Water Bottle Rockets Wet Jet Go! This stunt has lots going on: air pressure, a satisfying 'whoosh' noise, a high speed departure and a good soaking if you are standing close.