1. Sound waves transfer energy through vibrations

2. Sound Produced by vibrations Mechanical waves Vibrate particles Medium affects sound waves. (p. 42) Temperature affects sound waves. (p. 43)

4. Sound Frequency Frequency determines pitch Higher frequency = higher pitch Lower frequency = lower pitch

5. Sound Amplitude Intensity = loudness

6. Doppler Effect The motion of an object effects the pitch of its sound.

10. Electromagnetic Waves

11. The EM Spectrum

12. The EM Spectrum is broken into different wave types by frequency and wavelength radio waves microwaves infrared rays (visible light) ultraviolet light x-rays gamma rays

13. Radio Waves longest wave length, lowest frequency frequency is measured in hertz 1 hertz = 1 wavelength/second what is the frequency range for radio waves? wavelength = 10⁴ to 1 meter long. how are radio waves used?

14. microwaves What is the frequency range? What is the wavelength range? What are some uses?

15. infrared rays What is the frequency range? What is the wavelength range? What are some uses?

16. visible light Roy G. Biv

17. Ultra violet light What is the frequency range? What is the wavelength range? What are some uses?

18. x-rays What is the frequency range? What is the wavelength range? What are some uses?

19. gamma rays shortest wavelength What is the frequency range? What is the wavelength range? What are some uses?

26. Transparent

27. Translucent

28. Opaque