sound can be heard on the surface of the moon
Answers
Sound consists of compression waves that travel through something. On Earth, that’s usually air. When something causes a sound — whether it’s someone speaking, or your TV playing something through its speakers — it creates waves in the air. These waves reach your ear, and cause your eardrum to vibrate. Nerves in your ear detect this vibration, and send signals to your brain, which you perceive as sound.
The Moon has no air, so for all practical purposes there’s nothing to transmit waves. If an astronaut drops a tool on the Moon, he won’t hear anything because, again, there’s nothing to carry the vibration to his eardrums.
That doesn’t mean sound on the Moon is completely impossible, however. If two astronauts hold their helmets together, there is now a path for the vibrations from one astronaut’s mouth to the other astronaut’s ear. It’s not a very good path, but it’s there.
no because sound needs material medium 2 travel so we cannot hear any sound at the surface of moon