Vibrations & Sound

Question 1

Which of the following groups names three different things that make a sound because they vibrate?

Accepted Answer

drum skin, guitar string, voice box

Answer

guitar string, computer monitor, wind chime

Answer

voice box, plastic bottle, picture frame

Answer

drum skin, wooden table, flashlight

Question 2

Sam sets a small plastic cup filled with water on top of a battery‑powered speaker. He turns the speaker on and it plays a loud song. Which observation would best show that the sound coming from the speaker is making the water vibrate?

Accepted Answer

The surface of the water starts to ripple and small waves appear while the music plays.

Answer

The speaker shakes because someone is tapping the table, and the cup moves with it.

Answer

A pebble drops into the water and makes a splash, even though the music is still playing.

Answer

You hear a bubbling noise coming from the water as the music plays.

Question 3

Which of the following shows that sound can make another object vibrate?

Accepted Answer

A piece of paper placed on a speaker wiggles when the speaker plays music.

Answer

A child listens to a song on headphones and can hear the music.

Answer

A metal spoon placed on a table makes a ringing sound when it is tapped.

Answer

A piece of paper held a few inches away from a speaker stays still while the music plays.

Try three questions

Which of the following groups names three different things that make a sound because they vibrate?

Sam sets a small plastic cup filled with water on top of a battery‑powered speaker. He turns the speaker on and it plays a loud song. Which observation would best show that the sound coming from the speaker is making the water vibrate?

Which of the following shows that sound can make another object vibrate?

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