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There's no atmospheric pressure to carry the sound waves
Waves; sound waves.
sound waves bounce off of walls. they need air to travel.
sound waves can't travel in a vacuum (space)
Sound waves require a medium to travel through, and, since space is a vacuum, sound waves can't travel in it.
sound waves
Because they are waves, and waves travel that way.
Sound waves cannot travel through vaccum.
sound waves
Yes, sound waves can travel through clouds.
Sound waves cannot travel in space. Sound waves some medium in order to propagate.
Mechanical waves are waves that require a medium in which to travel, i.e., a solid or fluid. As sound needs a medium to travel, sound is a mechanical wave.