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Across 1. lowest point of a wave 6. these waves can travel through empty space 9. lower frequency = __________ wavelength 10. number of wavelengths that pass by a point in space each second 13. measure of energy a wave carries 14. when an object causes a wave to change direction 17. light that bounces back from an object 18. ____________ waves are vibrations that move back and forth in one plane 19. disturbance that carries energy 20. distance from any part of one wave to its corresponding point on the next wave 21. key word for this is tuning fork

Down 2. ___________ frequency = shorter wavelength 3. highest point of a wave 4. ____________ of a wave = frequency x wavelength 5. bending of light waves 7. another name for a longitudinal wave 8. this wave moves in a snakelike fashion 11. part of the wave where particles are far apart 12. matter that carries a wave 15. example of a transverse wave 16. example of a longitudinal wave