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Name ______________
Nuclear Power
Date: ___________
1. During a nuclear reaction, mass is converted into
1) charge
2) energy
3) isomers
4) volume
2. Energy is released during the fission of Pu-239 atoms as a result of the
1) formation of covalent bonds
3) conversion of matter to energy
2) formation of ionic bonds
4) conversion of energy to matter
3. A nuclear fission reaction and a nuclear fusion reaction are similar because both reactions
1) form heavy nuclides from light nuclides
3) release a large amount of energy
2) form light nuclides from heavy nuclides
4) absorb a large amount of energy
4. In a fission reactor, the speed of the neutrons may be decreased by
1) a moderator
2) an accelerator
3) a fuel rod
4) shielding
5. Base your answer to the following question on The diagram below represents a nuclear reactor. The arrows
indicate the direction of the flow of water.
Which structure is indicated by letter A?
1) turbine
2) moderator
3) control rod
4) internal shield
6. The main function of a coolant in a nuclear fission reactor is to
1)
2)
3)
4)
slow down the speed of the neutrons
absorb energy produced by the reaction
shield the wall of the reactor from radiation damage
adjust the number of neutrons available for reaction
7. Which two substances are most commonly used for shielding in a nuclear reactor?
1) water and heavy water
3) molten sodium and molten lithium
2) beryllium and graphite
4) steel and high-density concrete
8. Which substance is used as a coolant in a nuclear reactor?
1) neutrons
2) plutonium
3) hydrogen
4) heavy water
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9. Which pair of isotopes can serve as fissionable nuclear fuels?
1) U-235 and Pb-208
3) Pb-208 and Pu-239
2) U-235 and Pu-239
4) Pb-206 and U-235
10. Fissionable uranium-233, uranium-235, and plutonium-239 are used in nuclear reactors as
1) coolants
2) control rods
3) moderators
4) fuels
11. Given the balanced equation representing a nuclear reaction:
21H
4 2 He + 1 0 n
+ 31H
Which phrase identifies and describes this reaction?
1) fission, mass converted to energy
3) fusion, mass converted to energy
2) fission, energy converted to mass
4) fusion, energy converted to mass
12. Which conditions are required to form 42He during the fusion reaction in the Sun?
1) high temperature and low pressure
3) low temperature and low pressure
2) high temperature and high pressure
4) low temperature and high pressure
13. What is one benefit associated with a nuclear fission reaction?
1) The products are not radioactive.
2) Stable isotopes are used as reactants.
3) There is no chance of biological exposure. 4) A large amount of energy is produced.
14. Given the balanced equation representing a nuclear reaction:
23592U
14256Ba + 9136Kr + 3X + energy
+ 10n
Which particle is represented by X?
1)
0 –1e
2)
11H
3)
42H
4)
10n
15. Given the diagram representing a reaction:
Which phrase best describes this type of reaction and the overall energy change that occurs?
1) nuclear, and energy is released
3) chemical, and energy is released
2) nuclear, and energy is absorbed
4) chemical, and energy is absorbed
16. Which statement best describes what happens in a fission reaction?
1)
2)
3)
4)
Heavy nuclei split into lighter nuclei.
Light nuclei form into heavier nuclei.
Energy is released and less stable elements are formed.
Energy is absorbed and more stable elements are formed.
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17. An uncontrolled chain reaction takes place during the
1) operation of a fission nuclear reactor
3) production of energy by the Earth's Sun
2) explosion of an atomic bomb
4) fusion of light nuclei into heavier nuclei
18. Given the nuclear reaction:
This equation can best be described as
1) fission
2) fusion
3) natural decay
4) endothermic
Answer Key
Nuclear Power
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3
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1
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2
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4
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4
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4
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3
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2
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4
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1
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1
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2
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1