Across
- 3. a disturbance that transfers energy from one place to another
- 5. any substance that a wave moves through
- 6. the bending of a wave as it enters a new medium at an angle
- 8. the spreading out of waves through an opening
- 11. at a 90 degree angle
- 13. scientific study of sound
- 14. travel through air almost a million times faster than sound
- 18. the bouncing back of a wave after it strikes a barrier
Down
- 1. number of waves passing a fixed point in a certain time
- 2. distance from one wave crest to the next
- 4. distance between a line through the middle of a wave and crest or trough
- 7. the wave travels in the same direction as the disturbance
- 9. waves that transfer energy through matter
- 10. the direction in which the wave travels
- 12. meeting and combining of waves
- 15. wavelength x frequency
- 16. highest point or peak or a wave
- 17. diffract as they pass through an open doorway
- 19. point middle of the wave
- 20. lowest point or valley of a wave