Chapter 21
The Nature of Sound
Preview
CRCT Preparation
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
1. During a laboratory investigation, Aaron used an
oscilloscope to create graphs of sounds that he
produced using tuning forks. Which of these four
graphs represents the sound that has the lowest
volume?
A graph 1
B graph 2
C graph 3
D graph 4
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
1. During a laboratory investigation, Aaron used an
oscilloscope to create graphs of sounds that he
produced using tuning forks. Which of these four
graphs represents the sound that has the lowest
volume?
A graph 1
B graph 2
C graph 3
D graph 4
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
2. Which of these graphs represents the sound that
has the lowest pitch?
A graph 1
B graph 2
C graph 3
D graph 4
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
2. Which of these graphs represents the sound that
has the lowest pitch?
A graph 1
B graph 2
C graph 3
D graph 4
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
3. If you were conducting an experiment to determine
the speed of sound through water, which of the
following factors should you keep constant?
A the source of the sound
B the amplitude of the sound wave
C the loudness of the sound
D the temperature of the water
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
3. If you were conducting an experiment to determine
the speed of sound through water, which of the
following factors should you keep constant?
A the source of the sound
B the amplitude of the sound wave
C the loudness of the sound
D the temperature of the water
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
4. Cletus wants to make ear protectors for people
who work around loud jet engines at Hartsfield Airport
in Atlanta. Which of the following materials should he
experiment with for the best results?
A a material that amplifies sound
B a material that absorbs sound
C a material that transmits sound
D a material that produces sound
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
4. Cletus wants to make ear protectors for people
who work around loud jet engines at Hartsfield Airport
in Atlanta. Which of the following materials should he
experiment with for the best results?
A a material that amplifies sound
B a material that absorbs sound
C a material that transmits sound
D a material that produces sound
< Back
Next >
Preview
Main
Copyright © by Holt, Rinehart and Winston. All rights reserved.
Chapter 21
CRCT Preparation
5. Which of the following statements about what
happens when a guitar is played is true?
A The strings of the guitar are compressed.
B Particles of air move away from the guitar in all
directions.
C A longitudinal sound wave moves away from the
guitar.
D Sound moves away from the guitar in a single
direction.
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
5. Which of the following statements about what
happens when a guitar is played is true?
A The strings of the guitar are compressed.
B Particles of air move away from the guitar in all
directions.
C A longitudinal sound wave moves away from the
guitar.
D Sound moves away from the guitar in a single
direction.
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
6. Jesse walked into a large, dark room and yelled
“Hello!” She heard a loud echo of the word almost
immediately. Which of the following is a valid conclusion
that Jesse could draw from her observations?
A She produced sound waves that reflected off of the
walls of the room.
B She produced sound waves that created a sonic boom.
C She produced sound waves that destructively
interfered with each other.
D She produced sound waves that demonstrated the
Doppler effect.
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
6. Jesse walked into a large, dark room and yelled
“Hello!” She heard a loud echo of the word almost
immediately. Which of the following is a valid conclusion
that Jesse could draw from her observations?
A She produced sound waves that reflected off of the
walls of the room.
B She produced sound waves that created a sonic boom.
C She produced sound waves that destructively
interfered with each other.
D She produced sound waves that demonstrated the
Doppler effect.
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
7. According to the table, which of the following statements about
the speed of sound is true?
A The frequency of a sound
wave traveling through
hydrogen is higher than the
frequency of that wave
traveling through helium.
B The amplitude of a sound wave traveling through helium is
greater than the amplitude of that wave traveling through oxygen.
C The speed of a sound wave traveling through hydrogen is greater
than the speed of that wave traveling through oxygen.
D The pitch of a sound wave traveling through oxygen is higher than
the pitch of that wave traveling through hydrogen.
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
7. According to the table, which of the following statements about
the speed of sound is true?
A The frequency of a sound
wave traveling through
hydrogen is higher than the
frequency of that wave
traveling through helium.
B The amplitude of a sound wave traveling through helium is
greater than the amplitude of that wave traveling through oxygen.
C The speed of a sound wave traveling through hydrogen is greater
than the speed of that wave traveling through oxygen.
D The pitch of a sound wave traveling through oxygen is higher than
the pitch of that wave traveling through hydrogen.
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
8. Which statement best describes what happens in
the inner ear?
A Electrical signals are interpreted.
B Sound waves enter the ear and are channeled
through the ear canal.
C Sound waves are amplified by the hammer, anvil,
and stirrup.
D Sound vibrations are turned into electrical signals.
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
8. Which statement best describes what happens in
the inner ear?
A Electrical signals are interpreted.
B Sound waves enter the ear and are channeled
through the ear canal.
C Sound waves are amplified by the hammer, anvil,
and stirrup.
D Sound vibrations are turned into electrical signals.
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
9. You hear a single note played on a violin and the sound of a
firecracker exploding. Why is one sound considered music while the
other is considered noise?
A The violin produces a soft sound, but the firecracker produces a
loud sound.
B The violin produces sound waves that travel in a single direction,
but the firecracker produces sound waves that spread out in all
directions.
C The violin produces a sound wave that has a repeating pattern,
but the firecracker produces a complex sound wave that has no
repeating pattern.
D The violin produces a sound wave that has a high frequency, but
the firecracker produces a sound wave that has a low frequency.
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
9. You hear a single note played on a violin and the sound of a
firecracker exploding. Why is one sound considered music while the
other is considered noise?
A The violin produces a soft sound, but the firecracker produces a
loud sound.
B The violin produces sound waves that travel in a single direction,
but the firecracker produces sound waves that spread out in all
directions.
C The violin produces a sound wave that has a repeating pattern,
but the firecracker produces a complex sound wave that has no
repeating pattern.
D The violin produces a sound wave that has a high frequency, but
the firecracker produces a sound wave that has a low frequency.
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
10. LaToya generated a longitudinal wave within a
coiled-spring toy to model a sound wave. What is a
limitation of LaToya’s model?
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
10. Answer - Full-credit answers should include the
following point:
• A sound wave travels in all directions at once, while
the wave in a coiled-spring toy travels in only one
direction.
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
11. Describe the Doppler effect. When might you
observe the Doppler effect?
< Back
Next >
Preview
Main
Chapter 21
CRCT Preparation
11. Answer - Full-credit answers should include the following
points:
• The Doppler effect is the observed change in the frequency of a
wave when the source or observer is moving.
• For sound waves, the observed change occurs in the pitch of the
note produced.
• You might observe the Doppler effect whenever a source of
sound passes you, such as when a police car with its siren on
passes you. The pitch of the siren seems to change as the car
speeds by.
• You might also observe the Doppler effect whenever you move
past a source of sound, such as when you ride past a clanging
railroad crossing alarm.
< Back
Next >
Preview
Main