Nuclear reactions- fission, fusion and chain reactions.

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1. Fusion occurs when-

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

2. Only one neutron from each _____ can cause another _____

  • chain reaction
  • atom
  • fission
  • fusion

3. In 1989 scientists said they made fusion happen at 50 degrees celsius. Why?

  • other
  • there isn't any proof they did, so their experiments aren't valid. They could've lied or pulled of something really amazing but we'll never know.
  • because the experiment took place in space
  • because the experiment took place at the bottom of the ocean

4. How are chain reactions controlled?

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

5. Why is fusion difficult?

  • Trick question!
  • Because scientists haven't yet figured out how it works
  • Nuclei have to be really close before it occurs, and as unless really high temperatures and pressures are reached to overcome this, the positive charges repel one another
  • Nuclei may blow up if they get to the correct heat and pressure for fusion,so there is a low chance of them being able to fuse

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