Across
- 4. distance from one crest to the next
- 6. lowest point of a wave
- 8. height of a wave from rest to crest
- 13. low pressure area where particles are spread apart
- 14. wave that moves up and down perpendicular
- 15. ability to do work
- 16. how high or low a sound is
- 17. how fast a wave moves
- 18. high pressure area where particles are pushed together
Down
- 1. wave that requires a medium to travel
- 2. number of waves that pass a point in one second
- 3. material a wave travels through
- 5. how loud or soft a sound is
- 7. unit used to measure frequency
- 9. wave that moves back and forth parallel
- 10. highest point of a wave
- 11. disturbance that transfers energy through matter or space
- 12. wave that can travel through empty space