Multiple choice

An astronaut cannot hear his companion at the surface of the moon because

  1. the produced frequencies are above the audio frequency.

  2. there is no medium for sound propagation.

  3. the temperature is too low during night and too high during day.

  4. there are too many craters on the surface of the moon.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sound waves are mechanical and require a medium like air to travel from one point to another. Since the moon has no atmosphere, there is no medium to carry the sound vibrations, making it impossible to hear speech through the open environment. Astronauts must use radio sets to communicate instead.

Keep practicing — related questions