Nuclear Reactions

Which force holds protons and neutrons together in the atom nucleus?

• electric force

• gravity

• strong nuclear force

• weak nuclear force

Which best represents nuclear fission?

• F

• G

• H

• J

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NGSS.HS-PS1-8

Which of these diagrams represents the type of nuclear reaction that produces energy in the Sun?

• A

• B

• C

• D

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NGSS.HS-ESS1-1

NGSS.HS-PS1-8

A high temperature is required for which to occur?

• alpha decay

• beta decay

• nuclear fission

• nuclear fusion

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During nuclear fission, a nucleus _________.

• grows

• divides

• shrinks

• combines with another

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Only nuclei with _________ atomic numbers can undergo fission.

• small

• even

• odd

• large

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What is the term for an ongoing series of nuclear reactions?

• fission

• chain reaction

• fusion

• nuclear

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When two smaller nuclei come together, it is called ________.

• nuclear fission

• nuclear fusion

• chain reaction

• critical mass

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In the Sun, hydrogen atoms fuse together to form _________.

• helium

• mercury

• oxygen

• nitrogen

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NGSS.HS-ESS1-3

NGSS.HS-PS1-8

Nuclear fission of uranium-235 can start a chain reaction by

• releasing enough thermal energy to start nuclear fission in neighboring atoms

• producing two smaller atoms that can then strike and split neighboring atoms

• producing neutrons that can then strike and split neighboring atoms

• combining two atoms with low mass to form one large atom

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