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1. Sound is produced when objects: A. Vibrate B. Stop moving
A. Vibrate
2. Sound waves travel fastest in: A. Solids B. Gases
A. Solids
3. The unit for frequency is: A. Hertz (Hz) B. Newton (N)
A. Hertz (Hz)
4. The amplitude of a sound wave determines its: A. Loudness B. Pitch
A. Loudness
5. The frequency of a sound wave determines its: A. Pitch B. Loudness
A. Pitch
6. Humans can normally hear sounds between: A. 20 Hz – 20,000 Hz B. 200 Hz – 200,000 Hz
A. 20 Hz – 20,000 Hz
7. Which part of the ear detects sound vibrations? A. Cochlea B. Eardrum
B. Eardrum
8. Sound cannot travel through: A. A vacuum B. Water
A. A vacuum
9. Echo is caused by: A. Reflection of sound B. Refraction of sound
A. Reflection of sound
10. The height of a wave on an oscilloscope represents: A. Amplitude B. Frequency
A. Amplitude
11. Sound can be reflected by: A. A hard surface B. A soft surface
A. A hard surface
12. Sound energy is a type of: A. Mechanical wave B. Electromagnetic wave
A. Mechanical wave
