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CBSE Class 9 Answered

what is Sound?
Asked by faishalkohli0786 | 08 Apr, 2019, 11:26: PM
Expert Answer

A sound is a form of energy, just like electricity and light. A sound is made when air molecules vibrate and move in a pattern called waves, or sound waves. Think of when you clap your hands, it produces sound which travel through air (medium) and reach our ear.

  • Sound is a wave, a longitudinal wave
  • Sound needs a medium to travel
  • Waves have an amplitude (volume) frequency (pitch), wavelength (speed), etc
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