1) If an object is to produce sound, it must be able to a) bend b) expand c) rotate d) vibrate 2) SOUND belongs to this class of waves. a) Electromagnetic b) Transverse c) Mechanical d) Longitudinal 3) Can sound be heard if the following experiment continue? a) Yes b) No 4) A star in outerspace exploded and emitted radiation. Which waves could not reach the Earth form the exploding star? a) infrared b) light c) radio d) sound 5) How is pitch related to sound? Pitch is affected by ….. a) Amplitude b) Frequency c) Wavelength d) Speed of sound 6) How is loudness related to sound? a) Amplitude b) Frequency c) Speed of sound d) Wavelength 7) What is the range of audible frequencies for a young person? a) 1 Hz to 20 Hz b) 20 Hz to 20 kHz c) 20 kHz to 200 kHz d) 1000 kHz to 20000 kHz

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