Energy crossword

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Across
  1. 2. Energy efficient light source using semiconductors (3, 5)
  2. 4. Stored energy due to position or arrangement of particles (8, 9)
  3. 6. Energy associated with heat and particle motion (7, 6)
  4. 9. Component used to open or close a circuit (6)
  5. 11. Relationship between voltage, current and resistance (4, 3)
  6. 12. Tool that transforms electrical energy into kinetic and sound energy (8, 5)
  7. 14. Path through which electric current flows (8, 7)
  8. 17. Improving energy use to reduce waste and costs (10, 6)
  9. 20. Process of analysing household energy use (6, 5)
  10. 21. Rate of flow of electric charge (7)
  11. 22. Circuit with only one path for current flow (6, 7)
  12. 25. Scientific law stating energy cannot be created or destroyed (3, 2, 12, 2, 6)
  13. 28. Fossil fuel often used for heating and electricity generation (7, 3)
  14. 32. Opposition to the flow of electric current (10)
  15. 33. Energy carried by moving electric charges (10, 6)
  16. 34. Energy released from atomic nuclei (7, 6)
  17. 36. Measure of how much useful energy is produced compared to wasted energy (6, 10)
  18. 37. Movement of energy from one object or system to another (6, 8)
  19. 38. Fired fossil fuel commonly used to generate electricity (4)
  20. 39. Electrical potential difference measured in volts (7)
Down
  1. 1. Diagram representation of an electrical component (7, 6)
  2. 3. Energy source naturally replenished over time (9, 6)
  3. 5. Electricity generated using flowing water (5, 10, 5)
  4. 7. Energy possessed by a moving object (7, 6)
  5. 8. Label showing the energy efficiency of an appliance (4, 6)
  6. 10. Device that converts kinetic energy from wind into electrical energy (4, 7)
  7. 13. Energy source that cannot be quickly replaced (3, 11, 6)
  8. 15. Material that allows electricity to flow easily (9)
  9. 16. Visible form of electromagnetic energy (5, 6)
  10. 18. Unintended low resistance path in a circuit (5, 7)
  11. 19. Material that resists the flow of electricity (9)
  12. 21. Energy stored in bonds between atoms (8, 6)
  13. 23. Component that reduces the flow of current (8)
  14. 24. Source of electrical energy in many circuits (7)
  15. 26. Nonrenewable energy source formed from ancient organic matter (6, 4)
  16. 27. Process where energy changes from one form to another (6, 14)
  17. 29. Energy transferred through vibrations in a medium (5, 6)
  18. 30. Circuit with multiple paths for current flow (8, 7)
  19. 31. Appliance that transforms electrical energy into light and heat (7, 5)
  20. 35. Device that converts light energy into electrical energy (5, 5)