Sound Review

Sound is a type of _____.

• state of matter

• energy

• assignment

Which of the following would not produce a sound?

• humming a Flocabulary song in the hallway

• snapping your fingers where there is no matter, like in deep space

• plucking a guitar string underwater

• knocking a fist against a wooden wall

How can humans recognize sound?

• They can only hear it.

• They can only hear and see it.

• They can hear it, and might also see and feel it.

• Humans cannot perceive sound.

How does sound energy travel?

• Sound energy travels in waves that need a solid, liquid or gas to carry them.

• Sound energy travels in waves that can move through the vacuum of empty space.

• Sound energy travels in a straight line in one direction.

• Sound energy travels in a straight line that switches directions periodically.

What is a wave’s frequency?

• the width of a wave

• the rate at which a wave occurs

• the height of a wave

• the lowest point of a wave

A sound wave that occurs at a quick rate and has a high frequency would produce _______.

• a loud sound.

• a low-pitched sound.

• a high-pitched sound.

• a soft sound.

Which of the following is a measurement of a wave’s amplitude?

• the distance to the highest point of a wave

• the distance between waves

• the distance from which a sound can be detected

• the distance across the widest point of a wave

A sound wave that has a very short amplitude would produce  ________.

• a loud sound.

• a low-pitched sound.

• a high-pitched sound.

• a soft sound.

While hiking a mountain, Gwen called out, “Yoohoo!” She then heard her own voice say, “Yoohoo. Yoohoo. Yoohoo.” What happened?

• The sound was completely absorbed by the mountain.

• The sound reflected back to Gwen as an echo.

• The sound was completely carried through the mountain away from Gwen.

• The sound didn’t travel as a wave at all.

_____ is the act of squeezing, pressing or making something smaller or flatter.

• amplitude

• compression

• vibrate

• energy