Reviewing Vocabulary
Copy and complete the chart below by using
vocabulary terms from this chapter.
Property of
Wave
Unit
of Measurement
Characteristic
of Sound
Frequency
1.
2.
3.
4.
loudness
Make a frame for each of the vocabulary
words listed below. Write the word in the
center. Decide what information to frame it
with. Use definitions, examples, descriptions,
parts, or pictures. An example is shown.
sound with a frequency too
high for humans to hear
used by
bats and
dolphins
ULTRASOUND
used in
sonar
used in medicine
5. resonance
8. acoustics
6. Doppler effect
9. echolocation
7. amplification
10. sonar
Reviewing Key Concepts
Multiple Choice Choose the letter of the best
answer.
11. Sound is a mechanical wave, so it always
a. travels through a vacuum
b. has the same amplitude
c. is made by a machine
d. travels through matter
13. In which of the following materials would
sound waves move fastest?
a. water
b. cool air
c. hot air
d. steel
14. Which of the following effects is caused by
amplification?
a. wavelength increases
b. amplitude increases
c. frequency decreases
d. decibel measure decreases
15. The frequency of a sound wave determines its
a. pitch
b. loudness
c. amplitude
d. intensity
16. As sound waves travel away from their source,
their
a. intensity increases
b. energy increases
c. intensity decreases
d. frequency decreases
17. A telephone mouthpiece changes sound
waves into
a. electric signals
b. vibrations
c. CD pits
d. grooves on a cylinder
Short Answer Look at the diagrams of waves
below. For the next two items, choose the
wave diagram that best fits the description,
and explain your choice.
a.
12. Which unit is a measure of sound frequency?
a. hertz
b. decibel
c. amp
d. meter
b.
c.
18. the sound of a basketball coach blowing a
whistle during practice
19. the sound of a cow mooing in a pasture
Chapter 14: Sound 499