Indiana Science Grade 7

Chapter 14: Waves, Sound, and Light

Standardized Test Practice

1.
Which of the following terms refers to the change in direction of a wave when it travels from one material into another?
A)refraction
B)diffraction
C)reflection
D)transmission
2.
The table shows the speed of sound through different materials. About how far can sound travel in air in 1.45 s if the air temperature is 20°C? [insert art 681_STP_Questions_ta01 table of speed of sound, p. 720]
A)237 m
B)423 m
C)721 m
D)497 m
3.
Sound travels 8,740 m through a material in 5.7 seconds. What is the material? [insert art 681_STP_Questions_ta01 table of speed of sound, p. 720]
A)glass
B)steel
C)seawater (25°C)
D)water (25°C)
4.
Which of the following is true about light waves?
A)They travel at the same speed through matter and empty space.
B)They cannot travel through matter.
C)They slow down when traveling through matter.
D)They are a type of compressional wave.
5.
Which of the following shows a trough of the wave in the figure?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078617812/161383/681_697_q5_q6.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (15.0K)</a>

A)label H
B)label F
C)label G
D)label J
6.
Which label shows the amplitude of the wave?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078617812/161383/681_697_q5_q6.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (15.0K)</a>

A)label G
B)label F
C)label H
D)label J
7.
What is the highest frequencies of sound that humans can hear?
A)150 Hz
B)200 Hz
C)5000 Hz
D)20,000 Hz
8.
If the intensity of a sound increases by 30 dB, by what factor is the energy carried by the sound wave increased?
A)30 times
B)100 times
C)300 times
D)1000 times
9.
You hear thunder 2.5 seconds after you see a lightning flash. Later you hear thunder 2.0 seconds after you see a flash. If the sound travels at 340 m/s, how much closer was the second lightning strike than the first one?
A)170 m
B)850 m
C)680 m
D)1530 m
10.
The frequency of a sound is 43.6 Hz, and the sound travels through air at 343 m/s. What is the wavelength of the sound?
A)7.87 m
B)1.80 m
C)127 m
D)2700 m
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Policy before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.