Chapter 20: Sound

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Chapter 20: Sound - Quiz

Questions and Answers
  • 1. 
    The source of every sound is something that is
    • A. 

      Vibrating.

    • B. 

      Moving.

    • C. 

      Accelerating.

    • D. 

      Undergoing simple harmonic motion.

    • E. 

      A net emitter of energy.

  • 2. 
    A sound source of high frequency emits a high
    • A. 

      Speed.

    • B. 

      Amplitude.

    • C. 

      Pitch.

    • D. 

      All of these

    • E. 

      None of these

  • 3. 
    Double the frequency of a sound and you halve its
    • A. 

      Wavelength.

    • B. 

      Speed.

    • C. 

      Amplitude.

    • D. 

      All of these

    • E. 

      None of these

  • 4. 
    Double the frequency of sound and you also double its
    • A. 

      Wavelength.

    • B. 

      Speed.

    • C. 

      Amplitude.

    • D. 

      All of these

    • E. 

      None of these

  • 5. 
    The approximate range of human hearing is
    • A. 

      10 hertz to 10,000 hertz.

    • B. 

      20 hertz to 20,000 hertz.

    • C. 

      40 hertz to 40,000 hertz.

    • D. 

      Actually all of these – depends on the hearing ability of the person.

  • 6. 
    We are best at hearing
    • A. 

      Infrasonic sound.

    • B. 

      Ultrasonic sound.

    • C. 

      Both infrasonic and ultrasonic sounds.

    • D. 

      None of the above choices are true.

  • 7. 
    A sound wave is a
    • A. 

      Longitudinal wave.

    • B. 

      Transverse wave.

    • C. 

      Standing wave.

    • D. 

      Shock wave.

    • E. 

      None of the above choices are correct.

  • 8. 
    Compressions and rarefactions are characteristic of
    • A. 

      Longitudinal waves.

    • B. 

      Transverse waves.

    • C. 

      Both longitudinal and transverse waves.

    • D. 

      None of the above.

  • 9. 
    Compressions and rarefactions normally travel in
    • A. 

      The same direction in a wave.

    • B. 

      Opposite directions in a wave.

    • C. 

      Directions that are at right angles to the wave direction.

  • 10. 
    Sound travels faster in
    • A. 

      Air.

    • B. 

      Water.

    • C. 

      Steel.

    • D. 

      A vacuum.

    • E. 

      Sound travels at about the same speed in all of the above media.

  • 11. 
    Sound waves cannot travel in
    • A. 

      Air.

    • B. 

      Water.

    • C. 

      Steel.

    • D. 

      A vacuum.

    • E. 

      Any of the above media

  • 12. 
    The speed of a sound wave in air depends on
    • A. 

      Its frequency.

    • B. 

      Its wavelength.

    • C. 

      The air temperature.

    • D. 

      All of the above choices are correct.

    • E. 

      None of the above choices are correct.

  • 13. 
    Sound travels faster in air if the air temperature is
    • A. 

      Warm.

    • B. 

      Cold.

    • C. 

      Average.

  • 14. 
    A wave having a frequency of 1000 hertz vibrates at
    • A. 

      Less than 1000 cycles per second.

    • B. 

      1000 cycles per second.

    • C. 

      More than 1000 cycles per second.

  • 15. 
    Reverberation is actually a case of
    • A. 

      Sound interference.

    • B. 

      Forced vibrations.

    • C. 

      Re-echoed sound.

    • D. 

      Resonance.

    • E. 

      None of the above

  • 16. 
    The explanation for refraction must involve a change in
    • A. 

      Frequency.

    • B. 

      Wavelength.

    • C. 

      Speed.

    • D. 

      All of the above choices are true.

    • E. 

      None of the above choices are true.

  • 17. 
    When the speed of sound near the ground is greater than it is at higher altitudes, the sound tends to be bent
    • A. 

      Upward.

    • B. 

      Downward.

    • C. 

      To the left.

    • D. 

      To the right.

    • E. 

      None of the above choices are correct.

  • 18. 
    Refraction of sound can occur in
    • A. 

      Air.

    • B. 

      Water.

    • C. 

      Both air and water.

    • D. 

      Neither air nor water.

  • 19. 
    A dolphin perceives its environment by the sense of
    • A. 

      Sight.

    • B. 

      Sound.

    • C. 

      Both sight and sound.

    • D. 

      Neither sight nor sound.

  • 20. 
    In perceiving its environment, a dolphin makes use of
    • A. 

      Echoes.

    • B. 

      The Doppler effect.

    • C. 

      Ultrasound.

    • D. 

      All of the above choices are correct.

    • E. 

      None of the above choices are correct.

  • 21. 
    The energy of sound in air eventually becomes
    • A. 

      Increased internal energy of the air.

    • B. 

      Weaker and weaker until it disappears.

    • C. 

      Cancelled by destructive interference.

    • D. 

      Cancelled by both destructive and constructive interference.

  • 22. 
    The frequencies of sound that carry farther in air are
    • A. 

      Low.

    • B. 

      High.

    • C. 

      Ultrasonic.

  • 23. 
    The wavelengths of sound that carry farther in air are relatively
    • A. 

      Long.

    • B. 

      Short.

    • C. 

      Ultrasonic.

  • 24. 
    Sound will be louder if a struck tuning fork is held
    • A. 

      In the air.

    • B. 

      With its base against a table top.

    • C. 

      With its prongs in shallow water.

    • D. 

      In your closed fist.

  • 25. 
    A base fiddle is louder than a harp because of its
    • A. 

      Thicker strings.

    • B. 

      Sounding board.

    • C. 

      Lower pitch.

    • D. 

      All of the above are true.

    • E. 

      None of the above are true.

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