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Across 1. a wave in which particles vibrate perpendicular to the direction of the flow of energy 9. a wave in which particles vibrate parallel to the direction of the flow of energy 10. a form of energy produced by rapidly vibrating objects detectable by sensory organs such as the ear 15. the maximum displacement of a wave from its equilibrium point 16. the state of two identical waves that have the same phase shift 18. the region in a longitudinal wave in which the medium's particles are closer together 19. the material that permits the transmission of energy through vibrations

Down 1. the minimum point of a transverse wave 2. the displacement of a particle over a certain time interval 3. theproperty of a medium that returns to its original shape after being disturbed 4. any motion that repeats itself at regular intervals 5. the transfer of energy through a material due to vibration 6. the time for a vibrating particle to complete one cycle 7. a shift of an entire wave along the x-axis with respect to an otherwise identical wave 8. the state of two identical waves that have different phase shifts 11. the region in a longitudinal wave in which the medium's particles are farther apart 12. the cyclical motion of an object about an equilibrium point 13. the maximum point of a transverse wave 14. the shape of a wave when graphed 17. in a continuous transverse or longitudinal wave ,the x-coordinate of a unique point of the wave