Sound Check

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1. Sound waves need _________ to travel through.

• an echo
• a medium
• reflection
• absorption

2. Most adult voices are lower in pitch than children’s voices. What can you conclude based on this information?

• Adults’ vocal cords usually vibrate more slowly than children’s vocal cords.
• Children’s vocal cords usually vibrate more slowly than adults’ vocal cords.
• Adults' vocal cords usually vibrate more quickly than children's vocal cords.
• It is not possible to draw a conclusion based on this information.

3. How is frequency related to pitch?

• The pitch of a sound is always twice as large as the frequency of the sound.
• Objects that vibrate quickly produce low-pitched sounds that travel at low frequencies.
• Objects that vibrate quickly produce high-pitched sounds that travel at high frequencies.
• None of the above are ways in which frequency is related to pitch.

4. Notice where the two fingers are placed on the strings of the violins. With fingers in these positions, which violin would play the higher pitched sound?

• A. violin A
• B. violin B
• C. both play the same high sound
• D. both play the same low sound

5. Through which does sound travel the fastest?

• metal
• rubber
• water
• smoke

6. Which glass when tapped will have the lowest pitch?

• A
• B
• C
• D

7. Kara is designing a bedroom for her new home. She wants a room that is very quiet to make sure that her parents are not disturbed by her loud music. She also wants to make sure that she cannot hear the noise from the street. Which items should Kara include in her room design in order to absorb sound waves? Select ALL that apply.

• bean bag chairs
• window curtains
• large glass windows
• a full-body mirror
• a soft rug

8. During a thunderstorm, you see the lightning before you hear thunder. This is because _________.

• light has a greater mass than sound
• sound has longer wavelengths than light
• light travels faster than sound
• sound and light travel at the same

9. The monkey's call is a higher pitch than the lion's call. Why?

• The monkey uses more energy to make his noise.
• The lion has a bigger body and is a predator.
• The monkey's vocal cords vibrate at a faster rate.
• The monkey's vocal cords vibrate at a slower rate.