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Across 4. A wave that is produced by vibrating matter 6. Moves back-and-forth rapidly 7. Highness or lowness of a sound wave 10. What you used in the lab to see waves (2 words) 11. Does sound move faster or slower in warm air than in cold air? 14. The type of wave sound is 18. What do sound waves travel through? 19. Sound travels through this type of matter the fastest 20. What unit is frequency measured in?

Down 1. What do you do to frequency and wavelngth to find the speed? 2. Sound waves transfer ___________ through a medium 3. The part of your body that best produces sound waves and demonstrates vibration (2 words) 5. The change in perceived pitch that happens when the listener is moving (2 words) 8. The symbol for wavelength (The Greek name) 9. What you used in the lab to test for natural frequencies or resonance (2 words) 12. Energy 13. Does not affect speed 15. High frequency produces ___________ wavelengths 16. Low frequency produces ____________ wavelengths 17. Empty space