- Define the following terms: fission, moderator, nuclear mass defect, chain reaction, enrichment, control rods, nuclear reactor, critical mass.
- Describe the process of fission.
- Recognize that slow moving neutrons are more easily captured by a nucleus.
- Recognize that a large amount of energy as well as fast moving neutrons are released during fission.
- Give an example of a substance that can act as a moderator.
- Compare the amount of energy released during a fission reaction with the amount of energy released during the combustion of a typical fossil fuel.
- Explain how the neutrons released during a fissionable reaction can sustain a chain reaction.
- Explain why enrichment is used in preparing nuclear fuels.
- Recognize that a mass greater than the critical mass is needed to produce an uncontrollable chain reaction.
- Recognize the destructive power of and radioactive fallout from nuclear weapons.
- Help bring about an end to the threat of nuclear war.
- Fission is the splitting of a large nucleus into smaller nuclei.
- Slow moving neutrons are more easily captured by a fissionable material.
- Neutrons can be slowed by a moderator.
- The products formed during fission have a slightly lower mass due to the nuclear mass defect.
- A chain reaction is where the neutrons produced during a reaction causes a chain of similar reactions.
- The concentration of a fissionable material may be increased during a process called enrichment.
- Controlled chain reactions occur in nuclear reactors.
- Uncontrolled chain reactions occur in atomic bombs.
- Control rods are found in reactors and are used to absorb neutrons thereby controlling the rate of fission.
- Critical mass of a fissionable material is the minimum mass that will produce a nuclear explosion.
- Nuclear weapons are surrounded by a variety of societal issues.