Sound Worksheet-8

Sound Worksheet-8

 

  1. Sound cannot travel in vacuum.

 

  1. The number of oscillations per second of a vibrating object is called its time period.

 

  1. If the amplitude of vibration is large, sound is feeble.

 

  1. For human ears, the audible range is 20 Hz to 20,000 Hz.

 

  1. The lower the frequency of vibration, the higher is the pitch.

 

  1. Unwanted or unpleasant sound is termed as music.

 

  1. Noise pollution may cause partial hearing impairment.

 

  1. Sound can travel in vacuum.

 

  1. We can hear the sound of the frequency 20 Hz to 20,000 Hz.

 

  1. The sound could not travel in solid materials.

 

  1. The sound is caused due to propagation of vibrations.

 

  1. The pitch of a sound depends on the frequency of the waves.

 

Answer:

  1. True

  2. False

  3. False

  4. True

  5. False

  6. False

  7. True

  8. False

  9. True

  10. False

  11. True

  12. True