AnswersWA-Physical Science BLab: Kinetic Energy

Nuclear Energy Answers

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Which feature of nuclear fission reactions allows these reactions to take place in a chain reaction?

A
Thermal energy is released and heats up the reactants.
B
More smaller atoms form that can undergo fission.
C
A larger atom is formed, which can then be split.
D
Neutrons start the reaction and are released during it.
2
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What is Albert Einstein’s contribution to the understanding of nuclear energy?

A
He proposed that matter can be converted to energy and vice versa.
B
He first discovered that nuclear-reaction products are lighter than the reactants.
C
He developed the use of nuclear reactions to generate electricity.
D
He demonstrated that a uranium nucleus splits and releases neutrons.
3

Which element is the primary fuel used to generate electricity using nuclear energy?

A
coal
B
hydrogen
C
uranium
D
helium
4

A nuclear power plant is built alongside a river. What measurements should a monitoring station downstream record to be sure that the proper procedures are being followed at the power plant?

A
density and radiation levels
B
radiation levels and dust levels
C
salt concentration and temperature
D
temperature and radiation levels
5

Improvements in which area would help reduce the possibility of damage to the environment when using uranium as a fuel?

A
more-efficient extraction techniques
B
better control of fusion reactions
C
stronger-pumping wells
D
thicker shielding around the reactor
6

Why are very high temperatures and pressures required for fusion to occur?

A
to generate the neutrons that are needed to break the nuclei
B
to overcome the repulsion between the protons in the nuclei that join
C
to maintain the proper conditions to keep the chain reaction going
D
to keep the uranium fuel separate from the control rods
7

During a heat wave, there is an increased demand for electricity to operate air conditioners. The basic design of a nuclear reactor that generates electricity is shown below.

Question illustration
A
lower the control rods, which will absorb more neutrons before they can split atoms
B
raise the control rods so that fewer neutrons are absorbed and more can split uranium atoms
C
remove some of the fuel rods, which will leave more room for additional neutrons to split atoms
D
add additional fuel rods to generate additional neutrons to split uranium atoms
8

The image shows a process that releases nuclear energy.

Question illustration
A
The process must be fusion because energy is released.
B
The process must be fusion because a heavier nucleus forms from smaller nuclei.
C
The process must be fission because a large nucleus breaks into smaller nuclei.
D
The process must be fission because neutrons are formed.
9

Which refers to the continuous release of nuclear energy caused when one fission reaction triggers more nuclear reactions?

A
fusion reaction
B
trigger effect
C
energy effect
D
chain reaction
10

In which situation is nuclear power most beneficial?

A
if there is a low concentration of people
B
if there is a nearby supply of fossil fuels
C
if there is an isolated location
D
if there are many other energy resources

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