North Carolina Science Grade 6

Chapter 19: Sound

Sound

1.
The __________ is the frequency at which a material tends to vibrate when it is disturbed.
A)resonance
B)quality
C)pitch
D)natural frequency
2.
In the human ear, the membrane that stretches across the ear canal like a drumhead is called the __________.
A)anvil
B)cochlea
C)hammer
D)eardrum
3.
In which of the following mediums will sound travel fastest?
A)oil
B)brick
C)air
D)water
4.
Sounds are produced by __________.
A)frequencies
B)vibrations
C)reverberations
D)pitch
5.
A(n) __________ is a vibration whose frequency is a multiple of the fundamental frequency.
A)natural frequency
B)resonant frequency
C)overtone
D)reverberation
6.
As frequency increases, wavelength __________.
A)decreases
B)remains constant
C)becomes faster
D)increases
7.
How does temperature of a medium affect the speed of sound waves?
A)Temperature does not affect the speed of sound waves.
B)As the temperature of a substance increases, sound waves in it move more slowly.
C)As the temperature of a substance increases, sound waves in it move faster.
D)As the temperature of a substance decreases, sound waves in it move faster.
8.
Which of the following is NOT a group of musical instruments?
A)wind
B)overtones
C)stringed
D)percussion
9.
What is the less dense region of a compressional wave called?
A)rest position
B)rarefaction
C)crest
D)trough
10.
__________ is the ability of a medium to vibrate by absorbing energy at its natural frequency.
A)Quality
B)Reverberation
C)Overtone
D)Resonance
11.
The process of locating objects by emitting sounds and interpreting the reflected sound waves is __________.
A)ultrasound
B)sonar
C)echolocation
D)radar
12.
The intensity of sound is measured in units called __________.
A)hertz
B)decibels
C)reverberations
D)dopplers
13.
The echoing effect produced by many reflections of sound is called __________.
A)rarefaction
B)reverberation
C)intensity
D)resonance
14.
What type of waves are sound waves?
A)compressional
B)sonar
C)radio
D)transverse
15.
The two types of regions that make up compressional waves are __________.
A)compressions and extensions
B)vibrations and transmissions
C)compressions and rarefactions
D)compressions and transmissions
16.
The human perception of sound intensity is __________.
A)loudness
B)pitch
C)frequency
D)acoustics
17.
__________ occurs when waves bend around a barrier.
A)Refraction
B)Interference
C)Reflection
D)Diffraction
18.
Which of the following will you hear as a high pitch?
A)sound wave with intensity of 10 dB
B)sound wave with frequency of 50 Hz
C)sound wave with frequency of 10,000 Hz
D)sound wave with intensity of 100 dB
19.
What is the difference between music and noise?
A)Noise has a greater intensity than music.
B)Music has a wider range of frequencies than noise.
C)Music follows a specified pattern of sounds and pitches, noise has no pattern.
D)It is strictly a matter of opinion.
20.
How does a musician change the note played on a woodwind instrument?
A)by changing the length of the resonating column of air
B)by extending the slide
C)by changing the mouthpiece
D)by winding the strings more tightly
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