Electricity

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Across
  1. 2. Supplies electrical energy.
  2. 3. efficiency Using energy with less waste.
  3. 5. Single device producing electrical energy.
  4. 7. Energy lost (often heat or sound).
  5. 9. Opens or closes a circuit.
  6. 11. Energy that does the intended job.
  7. 12. How much input becomes useful output.
  8. 13. Two or more cells supplying energy.
Down
  1. 1. Energy changing form.
  2. 4. energy Energy going into a system.
  3. 6. Energy moving between objects.
  4. 8. Diagram showing energy flow and waste.
  5. 10. energy Energy coming out of a system.