Georgia Science Grade 8

Chapter 16: Waves

CRCT Practice

1
Two waves with the same wavelength overlap and interfere constructively. How is the resulting wave different from the original two waves?
A)It has a greater amplitude.
B)It has a lower amplitude.
C)It has a longer wavelength.
D)It has a shorter wavelength.
2
What property of the wave is shown at F?

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A)amplitude
B)wavelength
C)crest
D)trough
3
What property of the wave is shown at J?

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A)amplitude
B)wavelength
C)crest
D)trough
4
What of light waves enables you to see a sharp, clear image of yourself on a water surface?

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A)refraction
B)diffraction
C)reflection
D)interference
5
Why can't you see a sharp image of yourself if the surface of the water is rough?

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A)The roughness changes the wavelength of the light.
B)The light scatters in many different directions.
C)Light waves are diffracted.
D)The light changes speed when it strikes the water.
6
Frequency is measured in which unit?
A)meters
B)meters/second
C)decibels
D)hertz
7
What do waves carry as they move from one place to another?
A)matter
B)energy
C)matter and energy
D)particles and matter
8
What is the wavelength of wave A?

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A)0.5 m
B)1.0 m
C)2.0 m
D)3.0 m
9
What is the frequency of wave B?

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A)0.5 Hz
B)1.0 Hz
C)1.5 Hz
D)2.0 Hz
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