heat and electricity production crossword

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Across
  1. 3. electricity: Buildup of charges on surfaces.
  2. 7. Continuous flow of electric charge.
  3. 9. Material slowing down heat flow.
  4. 10. Sound wave caused by rapidly heated air.
  5. 12. Standard metric scale for temperature.
  6. 13. Matter shrinking when cooled down.
  7. 15. Device to open/close circuits.
  8. 16. Heat energy from inside Earth.
  9. 17. Flow of tiny electrical charges.
  10. 21. panel Cells collecting light to make electricity.
  11. 22. Source storing chemical electrical energy.
  12. 25. Heat transfer through direct contact.
  13. 26. Complete path for electrical current.
  14. 27. energy: Sustainable power from natural resources
  15. 28. Device controlling heating and cooling systems
Down
  1. 1. Heat transfer through electromagnetic waves.
  2. 2. Burning plant material to generate power.
  3. 4. Electricity made from moving river water.
  4. 5. Massive natural spark of static electricity.
  5. 6. Energy transferred between objects.
  6. 8. Heat transfer through fluid movement.
  7. 11. Material allowing easy heat flow.
  8. 13. Tool used to measure temperature.
  9. 14. Machine converting motion into electricity.
  10. 18. Invisible radiation felt as heat.
  11. 19. Liquid or paste conducting electricity inside batteries.
  12. 20. Electrolyte: Liquid or paste conducting electricity inside batteries.
  13. 23. Push force behind electric current.
  14. 24. Measurement of average kinetic energy.