Question

We cannot hear any sound on the surface of moon . why ??

Answer 1

The air here on Earth allows sound waves to move from one point to another (sound can also move through water, steel, earth, etc… ... Thus there is no sound on the Moon. In empty space, there is no air, and what we call "sound" is actually vibrations in the air.

Answer 2

there is no atmosphere on the moon and hence we can not here as sound cannot travel in vaccum