Section 15.1
Properties and Detection of Sound
Practice Test
1.
What is a sound wave?
a.
a pressure variation transmitted through matter
b.
a radio wave
c.
fluctuations in electromagnetic energy
d.
a surface wave
Hint
2.
The __________ of sound waves measures loudness.
a.
speed
b.
frequency
c.
amplitude
d.
period
Hint
3.
The speed of sound in air changes depending on __________.
a.
pressure
b.
wind
c.
volume
d.
temperature
Hint
4.
Long-term exposure to loud sounds can __________.
a.
increase high-frequency hearing
b.
increase low-frequency hearing
c.
decrease high-frequency hearing
d.
decrease low-frequency hearing
Hint
5.
Sound cannot travel through __________.
a.
water
b.
a vacuum
c.
gas
d.
steel
Hint
6.
Sound waves, like other waves, __________.
a.
reflect off a hard surface
b.
diffuse upon striking a hard surface
c.
refract through a hard surface
d.
are absorbed by a hard surface
Hint
7.
When a train passes and its whistle sounds like it changes pitch, the cause is __________.
a.
the Doppler Effect
b.
the Big Bang
c.
speed change
d.
the Galileo Effect
Hint
8.
What is the logarithmic scale that measures sound level?
a.
pressure
b.
decibel
c.
frequency
d.
electromagnetic spectrum
Hint
9.
The frequency of a sound determines its __________.
a.
loudness
b.
speed
c.
pitch
d.
timbre
Hint
10.
What type of wave is sound?
a.
electromagnetic
b.
transverse
c.
surface
d.
compressional
Hint
11.
During the Doppler shift, approaching sound waves __________.
a.
lengthen
b.
decrease frequency
c.
shorten
d.
gain amplitude
Hint
12.
Decibels measure changes in __________.
a.
frequency
b.
wavelength
c.
temperature
d.
pressure
Hint
