AnswersSA-FL-2002070-MJ Comprehensive Science 2-SEM1-26-27Unit Test

Unit Test — Unit test Answers

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Henri draws a wave that has a 4 cm distance between the midpoint and the trough. Geri draws a wave that has an 8 cm vertical distance from the trough to the crest.Which statement best describes the energy in Henri and Geri’s waves?

A
Henri’s wave has a higher amplitude and more energy.
B
Henri’s wave and Geri’s wave have the same amplitude and the same energy.
C
Henri’s wave and Geri’s wave have the same amplitude, but Geri’s has more energy.
D
Geri’s wave has a higher amplitude and more energy.
2
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The frequency of a wave does not change as it passes from one medium to another.What will most likely happen if a light wave moves from the air into a solid?

A
The wavelength of the light wave will increase.
B
The speed of the light wave will decrease.
C
The wavelength of the light wave will remain the same.
D
The speed of the light wave will remain the same.
3

Which example would contain only longitudinal waves?

A
a crowd doing the wave at a sporting event
B
an ultrasound that transmits soundwaves
C
the waves formed by the ocean
D
playing the guitar strings
4

Which statement best describes how waves carry energy?

A
Energy moves from one place to another through the wave.
B
Energy increases as it moves through the wave.
C
Energy is completely consumed by the beginning of the wave.
D
Energy builds through the wave and is released at the end.
5

Atomic bombs send out a shock wave when they are detonated. This occurs because the bomb’s detonation superheats the air particles nearby, which cause them to bump into other air particles that further the wave.Which statement can most likely be made about the shock waves of atomic bombs?

A
They are mechanical waves.
B
They are electromagnetic waves.
C
They will act like x-rays.
D
They will act like light rays.
6

Which types of waves requires matter to carry energy?

A
electromagnetic waves only
B
mechanical waves only
C
electromagnetic and mechanical waves
D
longitudinal and electromagnetic waves
7

Which refers to the number of wavelengths that pass a fixed point in a second?

A
wavelength
B
amplitude
C
frequency
D
compression
8

Which equation should be used to calculate the speed of a wave?

A
speed = frequency x wavelength
B
speed = frequency x hertz
C
speed = period x wavelength
D
speed = period x hertz
9

What will most likely happen if a sound wave moves from the air through a solid?

A
It will increase in frequency.
B
It will decrease in speed.
C
It will increase in speed.
D
It will decrease in wavelength.
10

A beam of light is traveling through a medium at 200,000 km/s. It enters a different medium and speeds up to almost 250,000 km/s. Finally, it enters a third medium and halts.What were the media the light traveled through, in order?

A
liquid, opaque solid, gas
B
opaque solid, gas, liquid
C
gas, liquid, opaque solid
D
liquid, gas, opaque solid
11

Which refers to the distance between two crests or two troughs on a transverse wave?

A
wavelength
B
amplitude
C
frequency
D
hertz
12

Which game most represents a wave?

A
hide and seek
B
tic-tac-toe
C
poker
D
tipping over dominoes
13

Which statement applies to transverse waves?

A
The waves have a trough.
B
Particles move great distances.
C
The waves have alternating compressions and expansions.
D
The energy is transferred parallel to the direction of the wave motion.
14

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
15

What is the speed of a wave with a frequency of 2 Hz and a wavelength of 87 m?

A
0.023 m/s
B
43.5 m/s
C
89 m/s
D
174 m/s
16

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.
17

Brody and Ethel are arguing about waves. Brody says that waving his hand back and forth is a scientific wave. Ethel says that it is not. Which statement best describes who is correct?

A
Brody is correct because the wave involves an input of energy.
B
Ethel is correct because energy is not carried from one place to another.
C
Brody is correct because the pattern repeats.
D
Ethel is correct because the motion has no pattern.
18

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
19

What is the motion of the particles in this kind of wave?

Question illustration
A
The particles will move up and down over large areas.
B
The particles will move up and down over small areas.
C
The particles will move side to side over small areas.
D
The particles will move side to side over large areas.
20

What is the speed of a wave with a wavelength of 3 m and a frequency of .1 Hz?

A
0.03 m/s
B
0.3 m/s
C
3.1 m/s
D
30 m/s

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