1) The term pitch describes what about a sound wave? a) The frequency of the sound wave. b) The wavelength of the sound wave. c) The highness or lowness of a sound wave. d) That the wave is an ultrasound wave. 2) What does the unit Hertz (Hz) measure? a) The wavelength of a sound wave. b) The frequency of a sound wave. c) The speed of a sound wave. d) The amplitude of a sound wave. 3) What type of wavelength would a high pitched sound wave have? a) A long wavelength. b) A short wavelength. c) You can't tell the wavelength of a sound wave by its pitch. 4) What is the frequency range that you can hear? a) 10 to 10,000 Hz b) 20 to 20,000 Hz c) 30 to 30,000 Hz d) 1 to 100 Hz 5) The frequency that will vibrate an object is called the object's a) natural frequency b) amplitude c) wavelength 6) When you combine your voice to match the frequency of the glass it is called a) resonance b) timbre (tam br) c) sound quality d) amplification 7) It's not possible to move objects with sound waves. a) False b) True 8) What is the length of a low-pitched sound wave? a) short-wavelength b) long-wavelength 9) What are sound waves with a frequency below 20 Hz called? a) ultrasound waves b) infrasound waves c) normal sound waves 10) Can dogs and cats hear higher sound waves than we can? a) No way. b) Yes! 11) A fancy name for when the sound quality of a singer/band/instrument is a) amplitude b) hertz c) timbre (tam br) d) acoustics 12) It appears that the sound wave coming from a moving police car's siren changed its' pitch, this is called a) timbre (tam br) b) the Doppler Effect c) magic! d) acoustics 13) Sound waves with a frequency over 20,000 Hz are called a) loud b) infrasound waves c) ultrasound waves d) impossible because we can't hear them. 14) To look inside your body at your heart, blood vessels, kidneys, etc. doctors use a) infrasound waves b) ultrasound waves c) opera singers 15) Which note has a lower pitch, 1,200 Hz, or 120 Hz? a) 1,200 Hz b) 120 Hz 16) All animals hear the same frequencies. a) True b) False 17) The quality of a sound wave is called a) timbre (tam br) b) resonance c) natural frequency 18) It is possible to use high-frequency sound waves to clean jewelry and other things. a) True b) False 19) If you are riding in the police car with the siren on, you can hear the change of pitch. a) False, the siren sounds the same. b) True 20) Which best describes what happens to the pitch of a sound demonstrating the Doppler Effect? a) low pitch, high pitch, high pitch b) high pitch, high pitch, low pitch c) high pitch, low pitch, high pitch d) low pitch, high pitch, low pitch

Sound Waves 2.2

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