AnswersTX-Integrated Physics and Chemistry B-CRUnit Test

Nuclear Radiation Answers

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1
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How does critical mass play a role in nuclear reactions?

A
It is the minimum amount of material needed to start a fission reaction.
B
It is the minimum amount of material needed to start a fusion reaction.
C
It is the minimum amount of material needed to sustain a fission reaction.
D
It is the minimum amount of material needed to sustain a fusion reaction.
2
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Which equation demonstrates that nuclear fusion forms elements that are heavier than helium?

A
mc019-1.jpg
Option A
B
mc019-2.jpg
Option B
C
mc019-3.jpg
Option C
D
mc019-4.jpg
Option D
3

Which is a characteristic of nuclear fusion?

A
produces radioactive waste
B
involves the collision of two nuclei
C
commonly used by humans as an energy source
D
requires very little activation energy
4

Which statement is true about this reaction?

Question illustration
A
It is a practical source of energy on Earth.
B
It occurs only outside the solar system.
C
Its product is heavier than each of its reactants.
D
It shows the critical mass of an element.
5

According to most scientists, cold fusion

A
will not be a practical source of energy on Earth.
B
would be a practical source of energy on Earth if it were less expensive.
C
will be a practical source of energy on Earth within the next few decades.
D
will always continue to be a practical source of energy on Earth.
6

Which best describes nuclear fission?

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.
7

Why is it important for scientists to replicate each other’s experiments?

A
to determine if important scientific results are repeatable
B
to help the research of other scientists
C
to determine if slight alterations in the experiment can affect the result
D
to further their own research
8

Which is most likely why many scientists reject the cold fusion theory?

A
There is too much waste involved in the process.
B
Cold fusion experiments have been conducted at room temperature only.
C
The process does not produce enough energy to meet the needs of modern humans.
D
The original results have not been replicated consistently and reliably.
9

Which statement is true about nuclear fusion?

A
It is caused by the same process that causes nuclear fission.
B
It does not occur naturally in the solar system.
C
It has very low activation energy.
D
It produces nearly all the elements that are heavier than helium.
10

Both nuclear fusion and nuclear fission reactions

A
release radioactive waste.
B
involve the splitting of atoms.
C
are utilized in nuclear power plants.
D
release large amounts of energy.

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