Across
- 3. Motion and position
- 4. Speed of vibrating particles
- 5. spreading of sound
- 7. Rhymes with piquancy
- 8. Lightning
- 10. Energy stored in chemical bonds
- 12. Helps you see when it is dark
- 14. More movement in particles
- 17. The lengths of waves
- 18. Moving objects
- 19. Stored energy
- 20. You hear this
Down
- 1. mirrors work with this
- 2. It travels in waves
- 6. Fusion or Fission
- 9. Rays
- 11. Taking in and using the vibration energy
- 13. see-through
- 15. Bending of light
- 16. Hight