Sounds Great--Bottled Music

 

 

 

YOU WILL NEED

• Five identical plastic bottles

• Water

 

HERE'S HOW

 

Fill five identical plastic bottles with varying amounts of water. Arrange the bottles in order from most to least full. Blow across the top of each bottle and compare the different sounds you make.

 

WHY?

 

Changing the amounts of air and water in the bottles lets you change the pitch—how high or low the sound is. When you blow across the tops of the bottles, you are making the air inside vibrate. In bottles with more air, vibrations are slower, so the pitch is lower.

All life is an experiment. The more experiments you make the better.

- Ralph Waldo Emerson

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