This could well be the simplest science experiment that I've ever shared.
Don't let that put you off - it's really cool and all you need is a sheet of paper and an empty drinks bottle.
Let's do this!
STEP1 - Tear off a small piece of paper and scrunch it up into a ball so that it fits in the mouth of your bottle!
STEP2 - Lay your bottle on its side and put the scrunched up piece of paper into the mouth of the bottle, as shown!
STEP3 - Here's where it gets fun! Challenge a friend to blow the piece of paper into the bottle (maybe place a sporting bet on it if you want to profit from science!). Try it - the piece of paper will come flying out!
This is all to do with Bernoulli's principle - he's one of those scientists that everyone's heard of but by no means everyone can remember what he said!
Bernoulli noticed that air has a lower pressure when it's moving more quickly. As you blow into the mouth of the bottle the air is moving fastest - so is at the lowest pressure.
Inside the bottle the air is moving more slowly - so a higher pressure. As the pressure is higher inside the bottle than in the mouth this pushes the paper out!
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