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Preview questions
1. What is sound?
A form of light · A form of energy · A type of force · A chemical reaction
2. Which medium does sound travel fastest in?
Air · Water · Solid · Vacuum
3. What is the unit of frequency?
Hertz · Decibel · Newton · Joule
4. What determines the pitch of a sound?
Amplitude · Frequency · Wavelength · Speed
5. Which of the following is a characteristic of a sound wave?
It can travel through vacuum · It is a longitudinal wave · It has no frequency · It is a form of matter
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