8
lesson pretestMultiple Choice

Pretest

Question 8 • Physics I

Which best describes a wave?

Answer
A
a disturbance that carries energy
B
a movement of fluids
C
a collision of particles
D
a group of electrically charged molecules

Explanation

A wave is a disturbance that transfers energy from one place to another. The material through which the wave travels may move or vibrate, but the wave is not simply a movement of fluids or a collision of particles. So the best description is “a disturbance that carries energy.”

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