Question

multiple choice question
sound waves require a medium in which to be transmitted. this explains why sounds do not travel in_______.
cold air
rocks
water
outer space

Explanation:

Sound waves are mechanical waves that need a medium (solid, liquid, or gas) to travel. Cold air (gas), rocks (solid), and water (liquid) are all media. Outer space is a vacuum with no medium for sound waves to propagate.

Answer:

outer space