ENERGY

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Across
  1. 4. Energy of radio waves
  2. 6. Energy is not created or destroyed
  3. 9. Heat energy
  4. 10. Energy in stretched objects
  5. 11. Turn off these to save energy
  6. 13. Efficient light bulbs
  7. 15. Renewable energy source
  8. 16. Energy stored in the nucleus
  9. 18. Ability to do work
  10. 19. Changing one energy form to another
  11. 20. Energy in chemical bonds
Down
  1. 1. Potential energy due to height
  2. 2. SI unit of energy
  3. 3. Energy of motion
  4. 5. Sustainable power source
  5. 7. Light energy type
  6. 8. Substance powering engines/generators
  7. 12. Energy in sound waves
  8. 14. Energy in magnets
  9. 17. Reducing energy use