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- 1. Multiple Choice
Nuclear fission is a nuclear reaction that releases energy by splitting large atoms into smaller ones.
True
False
- 2. Multiple Choice
Examples of nuclear fuels are...
Uranium
Neptunium
Plutonium
Mercury
- 3. Fill in the Blank
What particles are fired at atoms to make them split?
- 4. Fill in the Blank
The new, smaller nuclei are called __________ nuclei.
- 5. Fill in the Blank
Approximately _____ neutrons are released with each fission reaction.
- 6. Fill in the Blank
The extra neutrons that are released cause further nuclear fission reactions to happen. These then release even more neutrons and the process repeats. This is called a __________ reaction.
- 7. Open Ended
Explain why the neutrons released in nuclear fission must be slow-moving in order to cause a chain reaction.
- 8. Multiple Choice
A moderator, such as graphite, is used to...
stop a nuclear reaction happening
speed up neutrons
slow down neutrons
absorb radiation from the reaction
- 9. Multiple Choice
To slow down a nuclear fission reaction, the control rods are...
raised
lowered
- 10. Fill in the Blank
Control rods are often made from __________.
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