Question 1 — Which observation best supports the - Questions at the end of the chapter - Chapter 10 - Sound Waves: Characteristics and Application (Exploration

Last updated at July 3, 2026 by

Question 1
Which observation best supports the idea that sound is a mechanical wave? (i) Sound shows reflection (ii) Sound needs a medium to propagate (iii) Sound has frequency (iv) Sound carries energy
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Answer: (ii)

  • (ii) correct — needing a medium is the defining feature of a mechanical wave.
  • Reflection, frequency and carrying energy are true of sound but are shared by many waves, so they do not specifically prove it is mechanical.
Mechanical Wave Evidence Mechanical waves need a medium Sound needs a medium to travel So option (ii) is the best proof
Back to: 10.3 Sound Waves
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