P6.2 Powering Earth

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Across
  1. 2. When the current only flows in one direction (2 words)
  2. 3. An energy source which will not run out for millions of years
  3. 5. Unit of frequency
  4. 6. Fuel from uranium or plutonium
  5. 9. Method of generating and distributing electricity (2 words)
  6. 11. Coal, oil or gas
  7. 14. Blue wire
  8. 15. Used to support the wires of the National Grid
  9. 16. An energy source which takes millions of years to form
Down
  1. 1. When the current changes the direction it flows in (2 words)
  2. 4. Green & yellow wire
  3. 7. Used in the National Grid to change the PD
  4. 8. Using plants as an energy source
  5. 10. Brown wire
  6. 12. Diagram which shows wasted energy
  7. 13. Safety device which melts when the current gets too high