Across
- 4. The bending of a wave as it changes speed
- 5. A region where particles are spread apart
- 6. A repeating motion that transfers energy through space or matter
- 8. The time it takes for one complete wave cycle
- 10. The number of waves that pass a point each second
- 12. The unit used to measure frequency
- 16. The material through which a wave travels
- 17. The height of a wave from the resting point to the crest
- 18. A wave that can travel through empty space
- 19. The bouncing of a wave off a surface
- 20. The perceived highness or lowness of a sound
- 21. A wave that requires a medium to travel
Down
- 1. The spreading of waves around obstacles or openings
- 2. The position where the medium is undisturbed
- 3. A region where particles are pushed close together
- 7. The lowest point of a wave
- 9. A wave that moves parallel to its direction of travel
- 11. The full range of electromagnetic waves
- 13. The highest point of a wave
- 14. A wave that moves perpendicular to its direction of travel
- 15. The distance between two identical points on a wave