Active Time
10-20 minutes
Total Project Time
10-20 minutes
Key Concepts
music, sounds, physics, sound waves, frequency
A person blowing across the mouth of a bottle

Introduction

Have you ever blown across a bottle's top and made a pleasant, resonant sound? If so, have you wondered how that note is made exactly? The exact note you hear depends on the resonant frequency of the air in the bottle. Musical instruments like ocarinas operate based on a similar principle. In this science activity, you will use bottles to investigate how the volume of the air in the bottle affects the pitch of the note that it makes.

Credits

Teisha Rowland, 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

  • Narrow-neck bottles (3). They can be glass or plastic.
  • Permanent marker
  • Ruler
  • Water

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Active Time
10-20 minutes
Total Project Time
10-20 minutes
Key Concepts
music, sounds, physics, sound waves, frequency
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