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