Year 9 revision

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Across
  1. 1. High energy radiation released from nucleus during radioactive decay
  2. 4. A device used to measure voltage in an electrical circuit
  3. 6. The unit used to measure resistance in an electrical circuit
  4. 11. Subatomic particle without charge
  5. 12. A device in an electrical circuit that can stop the flow of electrons
  6. 13. An energy source that can be naturally replenished when used
  7. 15. The centre of an atom containing the protons and neutrons
  8. 16. A device in an electrical circuit that uses electrical energy such as a lamp
  9. 17. Time taken for half of a radioactive substance to decay
  10. 19. A measure of the useful energy produced in an electrical transformation
  11. 20. The flow of electrons in an electrical circuit
Down
  1. 2. The basic building block of matter
  2. 3. Positively charged subatomic particle
  3. 5. Negatively charged subatomic particle that orbits the nucleus
  4. 7. Type of decay that is made up of two protons and two neutrons
  5. 8. The rows of the Periodic Table
  6. 9. The opposition to the flow of electrical current
  7. 10. A method of wiring an electrical circuit where current has multiple pathways
  8. 14. A comparison between two similar things
  9. 18. A variation of an atom with different mass caused by a different number of neutrons