Question

Imagine a cannon being fired on the surface of the moon. Then the sound will

• A. Be heard at the surface of the earth during all seasons
• B. Not be heard at the surface of the earth
• C. Be heard at the surface of the earth during the rainy season
• D. Not be heard on the earth or on the moon

Answer 1

Answer: (B), (D)

Not be heard at the surface of the earth
Not be heard on the earth or on the moon

Sound waves need a medium to propagate. It can't move through a vacuum. In between earth and moon, there is no medium for sound propagation. So if a cannon being fired on the surface of the moon, then the sound will not be heard at the surface of the earth. The atmosphere of the moon is negligible for practical purposes. Hence, it will not be heard on the moon as well.