Question

Sam's father and mother are astronauts. Last month they returned from a tour to the Moon. Sam's father told him that they had air filled helmets and they also had microphones, which they used for talking to each other. Why did they use microphones to talk even after they were close enough to hear the sound of each other?

• A. There was too much noise on the Moon.
• B. There is no air on the Moon.
• C. His father's voice got trapped in the helmet.
• D. The gravity is too less to support sound propagation

Answer 1

The correct option is B

There is no air on the Moon.

There is no atmosphere on the Moon. Sound needs a medium to travel and since there is no air, sound cannot travel. This is the reason they were using microphones to communicate.