Fission & Fusion

What is nuclear fission?

• The joining of two light nuclei to form a heavier nucleus
• The splitting of a large and unstable nucleus
• The release of energy from the Sun
• The absorption of a neutron by a stable nucleus

Where is nuclear fusion used to release energy?

• The Sun and other stars
• Nuclear reactors
• Geothermal power plants
• Nuclear weapons

What is the relationship between mass and energy in nuclear fusion?

• Mass and energy are conserved
• Mass and energy are unrelated
• Mass is converted into energy
• Energy is converted into mass

How does a nuclear reactor control a chain reaction?

• By increasing the number of neutrons
• By increasing the pressure
• By decreasing the temperature
• By absorbing excess neutrons

What is the process of nuclear fusion?

• The release of energy from the Sun
• The joining of two light nuclei to form a heavier nucleus
• The splitting of a large and unstable nucleus
• The absorption of a neutron by a stable nucleus

What conditions are necessary for nuclear fission to occur?

• Joining of two light nuclei
• High pressure and low temperature
• Absorption of a neutron by a stable nucleus
• Spontaneous splitting of a nucleus

What is a chain reaction in the context of nuclear fission?

• A reaction where neutrons continue to split nuclei
• A reaction that is controlled in a nuclear reactor
• A reaction that releases energy from the Sun
• A reaction that occurs in a chain of events

How do nuclear fission and nuclear fusion compare?

• Fission involves joining nuclei, fusion involves splitting nuclei
• Fusion releases more energy than fission
• Fusion is controlled in reactors, fission occurs naturally
• Fission releases more energy than fusion