Multiple choice

One cannot hear sound on the moon because it has no _____.

  1. atmosphere

  2. light

  3. darkness

  4. gravity

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

Sound is a mechanical wave that requires a material medium (solid, liquid, or gas) to propagate. The moon has essentially no atmosphere - only an extremely thin exosphere - so there are insufficient air molecules to transmit sound waves from one point to another.