The air in your room is composed of molecules that have
A)nearly identical speeds.
B)a wide variety of speeds.
C)no speeds worth mentioning.

Question

Quizplus · Accepted Answer

The air in your room is composed of molecules of different sizes and masses, which means they will have a wide variety of speeds. Some will be moving faster than others, creating the random motion we observe as temperature. Therefore, B is the best choice. A and C are incorrect because all molecules in the air will have a speed, even if it’s incredibly slow or not measurable.

The Air in Your Room Is Composed of Molecules That