Nuclear reactions- fission, fusion and chain reactions.

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1. What's a chain reaction?

  • I can't see a link to physics
  • when in a fission reaction nuclei are formed, neutrons released in the reaction undergo fission
  • when in a fission reaction nuclei are formed, the energy released stimulates other nuclei to undergo a fission reaction
  • when in a fission reaction the nucleus is formed, it splits and comes back together again
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2. Fusion occurs when-

  • pigs fly,it's not happened yet
  • one big nuclei splits to form two daughter nuclei
  • small nuclei join to make large ones
  • you mess around injecting things with odd stuff you probably shouldn't even be near

3. How are chain reactions controlled?

  • other
  • nuclei are kept stable
  • use a different material to absorb neutrons,slwoing the recation down as there are fewer neutrons to stimulate more fission recations
  • we don't know how to control a hypothetical chain reaction yet

4. What are nuclei resulting from a fission reaction called?

  • daughter nuclei
  • son nuclei
  • fusion nuclei
  • resultant nuclei

5. Why isn't fusion a casual source of energy?

  • To produce the correct heat and pressure needed for fusion on Earth, it uses more energy than it makes
  • Because it doesn't produce any
  • It can currently occur in space only and can't be taken to Earth
  • It's only a hypothetical idea

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