2. Can you hear it? Samuel DuPont 2009

3.  Light  Heat  Sound  Electrical  Motion Samuel DuPont 2009

4.  Sound is caused by motion of air  Vibrations  The air moves in waves  Sound Waves  Similar to “Energy of Motion”  Moving air Samuel DuPont 2009

5.  A Sound Wave  Length of the Wave (Wavelength) ▪ Pitch  Amplitude ▪ How loud it is Samuel DuPont 2009

6.  Wavelength determines Pitch Low Pitch (Bass)High Pitch (Treble) Samuel DuPont 2009

7.  We get a full sound wave Samuel DuPont 2009

8.  We make Vibrations  Smack our hands together  Hit the desk Samuel DuPont 2009

9.  Vibrating Rulers  Shorter makes higher pitch  Rubber bands  Stretching makes higher pitch  Acoustic Guitar Samuel DuPont 2009