1. Sound and Waves Integrated Science

2. Sound Waves Description  Light waves are transverse waves.  Sound waves are longitudinal waves.

3. Relating the Two Wave Types Variations in Air Pressure and Corresponding Waveform

4. Wave Properties and Sound  A large amplitude = loud sound  Areas of compression are wide.  A high frequency = high pitch  Areas of compression are close together.

5. Sound Waves and Instruments  To make sound, musical instruments vibrate.  Vibrations from the instrument cause the longitudinal waves to form.  The frequency and size of the vibrations determine the pitch and volume of the sound.

6. Musical Instruments  How they work…  A wave is made and then amplified within the instrument.  Woodwinds  The reed makes the wave.  Brass  Your lips make the wave.  String  Plucking a string makes the wave.  Percussion  Hitting the drum makes the wave.

10. How We Hear Sound Outer Ear  Sound Waves hit our outer ear and eardrum causing it to vibrate.

11. How We Hear Sound Middle Ear  The eardrum vibrating causes three tiny bones in the ear to vibrate.  The three tiny bones cause liquid inside the ear to vibrate.

12. How We Hear Sound Inner Ear  The vibrations from the liquid inside the inner ear communicate with nerves that send the sound to our brain.