Through which state of matter does sound travel fastest?
AThrough a liquid
BThrough a solid
CThrough a gas
DThrough a vacuum
Answer & Solution
Correct answer: B. Through a solid
1. Sound is passed on by particles pushing against their neighbours.
2. The closer the particles sit, the faster that push is handed on.
3. Sound travels faster in solids than in liquids, and faster in liquids than in gases.
4. A vacuum has no particles at all, so sound cannot pass through it.
_Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 10: Sound_
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