This is a very easy project for kids to do and would work well at school or at a science magic party.
Stuff you need
A plastic bottle
A sheet of paper
How do I do it?
STEP 1
Tear off a little piece of paper (like a post it note) and crunch it up into a ball so that it fits in the mouth of your bottle!
STEP 2
Hold the bottle sideways and put the crunched up paper ball into the mouth of the bottle, as shown!
STEP 3
Now for the fun part of this experiment! Challenge a friend to blow the piece of paper into the bottle. Try it – the piece of paper will come flying out!
What’s going on here?
This happened because of Bernoulli’s principle.
Bernoulli realized that air has a lower pressure when it’s moving more quickly.
As someone blows 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!
Bonus
Here’s a bonus experiment with a surprising result that also use and demonstrates Bernoulli Principle.
Bernoulli’s Principle Bonus Science Magic
Try either or both of these at your next science magic party!
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