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Across 1. less dense area of a compressional wave 5. repeating movement that transfer energy through matter or space 6. earthquakes are thses kinds of waves 7. time it takes one wavelength to pass a point 8. matter in medium move at right angle to wave's direction of travel 11. it is wavelength times frequency 12. use this kind of spring to model a compresional wave 13. it causes most water waves 14. measures from crest to crest 16. it is the matter that waves travel through 18. go here to observe tranverse waves in action 19. in water waves, water moves in this kind of motion 21. this wave can travel through empty space 22. number of wavelengths that pass a point in 1 second 23. this measures frequency

Down 2. matter move back and forth in same direction as wave travel 3. more dense area of a longitudinal wave 4. these waves need a medium 5. waves travel faster when the temperature is 9. it tells how much energy a wave carries 10. waves travel fastest through these mediums 15. maximum negative displacement in a transverse wave 17. waves carry this without moving matter from place to place 20. maximum positive displacement in a transverse wave