Name: 
 

Chapter 7 Quiz



True/False
Indicate whether the sentence or statement is true or false.
 

 1. 

A mouse can hear lower sounds than a cat.
 

 2. 

Loud sounds are always higher in pitch than soft sounds.
 

 3. 

Echoes have to bounce off something at least 17 m away.
 

 4. 

A penny spinning in a balloon makes a lower sound as it slows down.
 

 5. 

Lower sounds have more vibrations per second.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 6. 

Sound travels through     
a.
solids
b.
liquids
c.
gases
d.
all of the above
 

 7. 

Dogs can hear some sounds that humans cannot hear because     
a.
the sounds have a higher frequency than humans can hear
b.
the sounds are not from nature
c.
the sounds come from another animal
d.
the sounds come from another dog
 

 8. 

Sound cannot travel in space because     
a.
distances are too great
b.
space is too cold
c.
there is no air in space
d.
This statement is not true. Sound does travel in space.
 

 9. 

What vibrates when you talk?
a.
vocal cords
b.
tongue
c.
teeth
d.
mouth
 

Complete the Sentences
Use the following words to complete the sentences.
frequency           echoes           faster           slower      
         loud       reflect       absorb       volume
 

 10. 

Sound waves travel ____________________ in gases than in liquids.
 

 

 11. 

____________________ sounds are made by large vibrations.
 

 

 12. 

Sound waves travel ____________________ in solids than in liquids.
 

 

 13. 

Sound does not ____________________ very well off soft surfaces.
 

 

 14. 

The _________________________ makes the pitch of a sound high or low.
 

 

 15. 

Sounds reflect off hard surfaces but do not always produce ____________________.
 

 

 16. 

Cars are lined with fabric and foam to ____________________ road and engine sounds.
 

 

 17. 

As the size of the sound vibrations gets smaller, the ____________________  goes down.
 

 

Answer the Questions
Use sentences to answer the questions.
 

 18. 

How did you use a Slinky to model how a sound wave travels through air?
______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
 

 19. 

How could you show someone that sound can travel through liquids?
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