Sound Review

If you are playing cymbals and hit them harder, what happens?

• The amplitude (energy) increases so it is louder.

• The amplitude (energy) decreases so it is softer.

• The frequency (pitch) increases so it is higher.

• The frequency (pitch) decreases so it is lower.

A bell can make a sound because

• it is made of metal

• it is solid

• it is heavy

• it can vibrate

If you blow into these two whistles, the shorter one will produce a sound that is

• higher

• lower

• softer

• louder

Which tool uses sound to communicate?

• telephone

• pencil

• flashlight

• magnet

An object will produce a sound if it

• is heavy

• heats up

• vibrates

• grows

The picture shows the direction the flashlight is pointing. The teacher is using it to send a signal. Which student will be able to best receive the signal?

• Student A

• Student B

• Student C

• Student D

A traffic light tells people what to do by using different colors. In order to know when to stop or go, a person must use what sense?

• hearing

• sight

• tasting

• smelling

Students need to construct a device that sends a signal using both light and sound. They have a selection of items that they can use to build the device. Which two items will be most useful for making a signaling device?

• a cotton ball and a tissue

• a note card and some yarn

• a large bell and a candle

• a paper towel and toothpick

When a stretched rubber band is plucked it makes a sound. Stretching the rubber band more makes it vibrate faster. What is the result of vibrating faster?

• The rubber band no longer makes the sound.

• The rubber band makes a louder sound.

• The rubber band makes a sound that lasts longer.

• The rubber band makes a higher pitched sound.

How loud a sound is can be described as ________.

• vibration

• instrument

• frequency

• amplitude