Multiple choice

Sound cannot pass through

  1. water

  2. steel

  3. air

  4. vacuum

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sound is a mechanical wave that requires a medium (solid, liquid, or gas) to propagate. A vacuum is the absence of any medium, so sound cannot travel through it. Sound can travel through water, steel, and air, making vacuum the only correct answer.