A student takes notes in class.

Sound Waves

I. Created by a vibration

A. Vibration: something that causes air molecules to move back and forth quickly and steadily

II. Move through a medium

A. Solid

B. Liquid

C. Gas

Which line of her notes contains an error? I I A II B II C

Answer: IA (the answer is not among the given options)

Explanation:

While it is true that the sound depends on a medium to move, its speed will depend on the medium, whether solid, liquid or gas.

It is also true that sound waves are mechanical vibrations, in this sense, vibrations of molecules do not only occur in the air (gaseous medium), but also in solids and liquids, which makes the propagation of sound possible in the respective media.

Therefore, the line that contains error is IA