Energy

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Across
  1. 3. passing
  2. 5. joules
  3. 7. thickness
  4. 8. hotness matter
  5. 9. heat or sound
  6. 11. charcoal
  7. 12. combine
  8. 16. thermal
  9. 17. fluid
  10. 20. germs
Down
  1. 1. opposite of solid
  2. 2. plasma
  3. 4. still
  4. 6. motion
  5. 10. opposite of liquids
  6. 13. repelling
  7. 14. hot
  8. 15. generate
  9. 18. sound waves
  10. 19. vapor