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Balloon Magic with Bernoulli's Principle

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Active Time
20-30 minutes
Total Project Time
20-30 minutes
Key Concepts
Physics, Bernoulli's principle

Introduction

Have you ever seen pictures or videos of a roof being blown off a house during a hurricane or tornado? You might be surprised to hear that the roof is actually not pushed off by the strong winds but instead by the air inside the house! This can be explained by Bernoulli's principle, which states that fast-moving fluids or air, such as strong winds, have lower pressure than slow-moving air. In this activity you will demonstrate how balloons can be moved in a similar way. It is not quite as impressive as blowing the roof of a house, but still pretty magical!

Credits

Svenja Lohner, 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

  • Two balloons of the same size
  • String (about 60 cm length)
  • Scissors
  • Tape
  • A door frame
  • Paper towel tube
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Active Time
20-30 minutes
Total Project Time
20-30 minutes
Key Concepts
Physics, Bernoulli's principle
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