AnswersTX-Integrated Physics and Chemistry B-CRUnit Test

Unit Test — Unit test Answers

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1
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Doug is doing work. Without knowing exactly what he is doing, which can be said about the work he is doing?

A
Energy is transferred.
B
Energy is increased.
C
Energy is decreased.
D
Energy is unchanged.
2
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Ryan is examining the energy of the particles in a bar of gold. What is Ryan most likely studying?

A
thermal energy
B
electric energy
C
potential energy
D
internal energy
3

What is the overall energy transformation in a coal-fired power plant?

A
electrical to chemical
B
chemical to electrical
C
nuclear to radiant
D
radiant to nuclear
4

Consider the three equations below.Which statement do these reactions best support?

Question illustration
A
Beta decay occurs only in certain atoms.
B
Alpha decay occurs only in certain atoms.
C
Chain reactions play important roles in the process of nuclear fission.
D
Nuclear fusion plays an important role in making elements that are heavier than helium.
5

Which best describes what forms in nuclear fission?

A
two smaller, more stable nuclei
B
two larger, less stable nuclei
C
one smaller, less stable nucleus
D
one larger, more stable nucleus
6

Which best defines energy?

A
a type of wave that carries energy through space, where there is almost no matter
B
a disturbance that carries energy form one place to another through matter and space
C
the ability to do work
D
pressing to make more compact
7

Two examples of energy transformations are shown.

Question illustration
A
begin with chemical energy.
B
begin with electrical energy.
C
result in radiant energy.
D
result in mechanical energy.
8

Hedea made a study chart about nuclear energy.Which best describes the error in Hedea’s chart?

Question illustration
A
The nuclei of atoms are split apart in both fission and fusion.
B
The nuclei of atoms are joined together in both fission and fusion.
C
Fission converts nuclear energy to electrical energy, not thermal energy.
D
Fission and fusion convert nuclear energy to both radiant and thermal energy.
9

Which best describes nuclear fusion?

A
A nucleus spontaneously splits and absorbs energy.
B
Two nuclei spontaneously combine and absorb energy.
C
A nucleus collides with a neutron and splits, releasing energy.
D
Nuclei combine to form a heavier nucleus, releasing energy.
10

Which best describes a difference between energy transformations in power plants and dams?

A
Only power plants use fossil fuels to transform energy.
B
Only dams use fission to generate thermal energy.
C
Only power plants use water to turn turbines.
D
Only dams use mechanical energy to produce electricity.
11

Which type of radiation do people try to protect themselves from by wearing protective clothing that is made of aluminum?

A
alpha radiation
B
beta radiation
C
gamma radiation
D
photon radiation
12

Which type of reaction does this diagram represent?

Question illustration
A
a chain reaction that is caused by nuclear fission
B
a chain reaction that is caused by nuclear fusion
C
a decrease in energy that is caused by nuclear fission
D
an increase in energy that is caused by nuclear fusion
13

This table shows four examples of experiments.

Question illustration
A
Lily and Henry
B
Astrid and Bob
C
Lily, Astrid, Henry, and Bob
D
Astrid, Henry, and Bob
14

Which is an example of potential energy?

A
a swimmer kicking their legs
B
a car driving on the road
C
an arrow flying at a target
D
a yo-yo in someone’s hand
15

Why would a doctor most likely restrict a patient’s contact with other people while the patient receives internal radiation?

A
The patient’s stress and anxiety would be eliminated.
B
High levels of radiation can diffuse through the patient’s skin.
C
Social contact would increase the effect of the radiation treatment.
D
Radioactive material can leave the patient’s body through saliva, sweat, and urine.

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