Topics of sound class 8 are given below:
10.1 Sound is Produced by a Vibrating Body
10.2 Sound Produced by Humans
10.3 Sound Needs a Medium for Propagation
10.4 We Hear Sound through Our Ears
10.5 Amplitude, Time Period and Frequency of a Vibration
10.6 Audible and Inaudible Sounds
10.7 Noise and Music
10.8 Noise Pollution
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