AnswersOC27 EarthSpace Sci-2001310-S2-NelsonUnit Test

Unit 8 Test Answers

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22
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The chart shows the speed at which light travels through different media.

Question illustration
A
water
B
air
C
glass
D
diamond
23
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What do sound waves and infrared waves have in common, and what makes them different?

A
Both carry energy through space, but sound waves are mechanical and infrared waves are electromagnetic.
B
Both can transfer energy through matter, but sound waves travel through air and infrared waves travel through space.
C
Both can transfer energy through matter, but sound waves can be heard and infrared waves can be seen.
D
Both carry energy through space, but sound waves require matter to pass through and infrared waves do not.
24

Augie created this chart about the two kinds of waves.Which best labels the chart?

Question illustration
A
Title 1 is “Longitudinal Waves,” and Title 2 is “Transverse Waves.”
B
Title 1 is “Transverse Waves,” and Title 2 is “Longitudinal Waves.”
C
Title 1 is “Electromagnetic Waves,” and Title 2 is “Mechanical Waves.”
D
Title 1 is “Mechanical Waves,” and Title 2 is “Electromagnetic Waves.”
25

Which phenomena support only the wave theory of light? Select 2 options.

A
reflection
B
refraction
C
diffraction
D
interference
E
photoelectric effect
26

An ultraviolet wave traveling through a vacuum has a wavelength of 4.0 × 10–7 m. The wave’s frequency, written in scientific notation to two significant figures, is × 1014 Hz.

Answer not available
27

How does an electric motor use magnetic force to produce motion?

A
The north pole of a permanent magnet placed in the center of an electromagnet attracts the north pole of the electromagnet.
B
The north pole of an electromagnet placed in the center of a permanent magnet attracts the north pole of the permanent magnet.
C
The north pole of a permanent magnet placed in the center of an electromagnet repels the north pole of the electromagnet.
D
The north pole of an electromagnet placed in the center of a permanent magnet repels the north pole of the permanent magnet.
28

J.J. Thompson is credited with discovering the

A
proton.
B
electron.
C
neutron.
D
nucleus.
29

A wave hits an object as shown.Which kind of wave interaction is shown?

Question illustration
A
absorption
B
diffraction
C
refraction
D
reflection
30

Remote controls rely on waves to carry signals and transmit information over short distances.

Answer not available
31

Radio stations use electromagnetic waves for broadcasting. The chart shows different frequencies of waves used by radio stations.

Question illustration
A
W
B
X
C
Y
D
Z
32

A wave hits a wall as shown.As the wave interacts with a wall, which kind of wave interaction is shown?

Question illustration
A
absorption
B
diffraction
C
refraction
D
reflection
33

Pierce conducts an experiment in which waves collide in a way that the energy increases. What has occurred?

A
refraction
B
reflection
C
constructive interference
D
destructive interference
34

Frank and Lisa are analyzing the chart, which shows the speed at which light travels through different media.Frank says that light travels through diamond with the greatest frequency. Lisa says that light travels through air with the greatest frequency.

Question illustration
A
Frank is correct because light travels through diamond at the slowest speed, and speed and frequency have an inverse relationship.
B
Lisa is correct because light travels through air at the fastest speed, and speed and frequency have a direct relationship.
C
Neither person is correct because light does not change frequency when it travels through different media.
D
Both people are correct because light has both an inverse and a direct relationship with frequency, depending on the media.
35

Which device converts electrical energy into kinetic energy?

A
an electric generator
B
an electric motor
C
a step-down transformer
D
a step-up transformer
36

Julia produces a 2 mA current by moving the south pole of a bar magnet into a solenoid. The solenoid contains 150 loops of wire.Which change should Julia make to generate a larger current?

A
moving the magnet slower
B
using more loops of wire in the coil
C
using the north pole of the magnet
D
setting the magnet down in the solenoid
37

Which refers to any disturbance that carries energy from one place to another through matter and space?

A
frequency
B
wave
C
hertz
D
pitch
38

A wave of infrared light has a speed of 6 m/s and a wavelength of 12 m. What is the frequency of this wave?

A
0.5 Hz
B
2.0 Hz
C
18 Hz
D
72 Hz
39

2 sets of waves with the top waves labeled A having more closely spaced crests than the bottom waves labeled B.

Question illustration
A
Wave A: Longitudinal WaveWave B: Transverse Wave
B
Wave A: High Frequency WaveWave B: Low Frequency Wave
C
Wave A: Transverse WaveWave B: Longitudinal Wave
D
Wave A: Low Frequency WaveWave B: High Frequency Wave
40

When the north pole of a bar magnet is moved into a solenoid, the needle on a galvanometer attached to the solenoid moves to the left, indicating that a current is produced. The magnet is then pulled out at a faster speed.What will be the result?

A
a larger current in the same direction
B
a larger current in the opposite direction
C
a smaller current in the same direction
D
a smaller current in the opposite direction
41

Julia performs an experiment to measure the wavelength of four different waves and records her data in the table below.Which accurately ranks the waves from the lowest energy wave to the highest energy wave?

Question illustration
A
1 → 4 → 3 → 2
B
2 → 3 → 4 → 1
C
3 → 2 → 4 → 1
D
1 → 4 → 2 → 3

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