Use a balloon filled with carbon dioxide to amplify sound waves
RN: 11011104 - PHYSICS > ACOUSTICS
3 & 4
In a normal situation one will have difficulty hearing a watch tick more than half a metre away, because our ears are separated from the watch by air, which is not a very good conductor of sound. In this science experiment we will be looking which property of materials makes for better conduction of sound:
STUFF YOU NEED [MATERIALS]
- BAKING SODA
- TICKING WATCH
HOW TO PROCEED [PROCEDURE]
- To make some carbon dioxide 'gas', mix together two tablespoons of baking soda with some vinegar in a large pouring bottle. The vinegar will make the 'soda' fizz and in the process carbon dioxide gas is released.
- Now pull the opening of a balloon over the mouth of the bottle so that it fits tightly.
- Wait while the balloon becomes filled with carbon dioxide gas, produced by the baking soda and vinegar, and remove it from the bottle. Close the open end of the balloon.
- ...... NOTE: The last few steps of this science experiment are only contained in the e-book version. Thank you for your support!
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