Question

medium
sound waves must have a medium to travel through.
in outer space there are no molecules to compress or rarely, so sound does travel through outer space.
speed of sound
depends on the of the medium it travels through.
at room temperature, sound travels through air at about m/s.

Explanation:

Sound is a mechanical wave that requires a medium (like solids, liquids, or gases) to propagate as it relies on the vibration of particles. In outer - space, being a vacuum with no particles, sound cannot travel. The speed of sound in a medium depends on properties such as density and elasticity. At room temperature (around 20 - 25°C), the speed of sound in air is approximately 343 m/s.

Answer:

1. Sound waves must have a medium to travel through because they are mechanical waves that rely on particle - to - particle interaction for propagation.
2. In outer space there are no molecules to compress or rarefy, so sound does not travel through outer space.
3. Speed of Sound depends on the density and elasticity of the medium it travels through.
4. At room temperature, sound travels through air at about 343 m/s.