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Active Time
10-20 minutes
Total Project Time
10-20 minutes
Key Concepts
Bernoulli’s principle, air pressure

Introduction

Did you know that airplanes and sound have something in common? Can you guess what it might be? Air pressure! It is fascinating how air—something that is so fluid and invisible—can power an amazing number of fascinating phenomena. In this activity you will use your own breath to blow a small paper ball into an empty bottle. It sounds simple, but is it? Try it out and see for yourself!

Credits

Sabine De Brabandere, PhD, Science Buddies
This activity is not appropriate for use as a science fair project. Good science fair projects have a stronger focus on controlling variables, taking accurate measurements, and analyzing data. To find a science fair project that is just right for you, browse our library of over 1,200 Science Fair Project Ideas or use the Topic Selection Wizard to get a personalized project recommendation.

Materials

  • A four-by-four-inch piece of printer paper
  • Plastic wide-mouth bottle, roughly 500 to 800 mL (If you need to use bottles with a regular opening, use a two-by-four-inch piece of paper to create the ball .)
  • Table or other flat surface
  • Helper
  • Optional: Small balls
  • Optional: Other bottles or jars
  • Optional: Drinking straw
    Materials needed to explore why it is hard to blow a ball in an empty bottle.

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Active Time
10-20 minutes
Total Project Time
10-20 minutes
Key Concepts
Bernoulli’s principle, air pressure
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