Across
- 4. how often a wave repeats in a given amount of time
- 5. a wave whose energy moves parallel
- 7. all light passes through
- 8. not transferred through a wave
- 12. height of a wave
- 13. sound travels slowest through this
- 15. sound travels slower through this
- 18. distance between two equal points on a wave
- 19. wave where the energy moves perpendicular
Down
- 1. a wave that neeeds some type of matter to travel through
- 2. a type of matter; a solid, liquid or gas
- 3. lowest point on a wave
- 6. highest point on a wave
- 9. some light passes through
- 10. wave that does not require a medium
- 11. a wave that needs a medium
- 14. sound travels fastest through this
- 16. no light passes through
- 17. causes an image to look bent or broken