Science (bit of everything)

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1. What is half-life ?

  • radioactive neutrons are stable and break down and change into a completly different atom
  • radioactive atoms are unstable and break down and change into a completely different atom
  • radioactive atoms are stable and break down and change into a completely different atom
  • radioactive neutrons are unstable and break down and change into a completly different atom
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Other questions in this quiz

2. How can you tell a chemical reaction is taking place ?

  • change in colour
  • Smell
  • All of them
  • Temperature

3. What is a resultant force ?

  • No force
  • A single force
  • A double force

4. What's in an animal cell ?

  • nucleus, cytoplasm, cell membrane, mitochondria, ribosomes
  • cell wall, nucleus, ribosomes, cytoplasm
  • nucleus, mitochondria, cell wall, cytoplasm

5. What is electrolysis ?

  • A process which ionic substances are broken down into simpler substances
  • A process which ionic substances are added to make a simpler form
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