Does sound waves move quicker through cold or warm matter

Because sound moves faster in warm air than colder air, the wave bends away from the warm air and back toward the ground. That's why sound is able to travel farther in chilly weather.

So warm matter will be your answer

Warm matter

Explanation:

Atoms in warm matter are more easily excitable - they jiggle and move more rapidly than atoms in a cold environment, and since a sound wave is a wave of vibrating matter, these waves will naturally travel quicker when it's warmer.

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue