1. SOUND

2. What do you hear?

3. DID YOU EVER WONDER HOW YOU HEAR THESE THINGS?

4. WAVES

5. Transversal Waves Crest

6. Longitudinal Waves

7. AMPLITUDE – Height of the wave The higher the amplitude, the louder the sound

8. Frequency – Number of waves per second. High frequency, higher the pitch

9. SOUND WAVES

10. Must travel in a MEDIUM.

11. SPEED OF SOUND

12. SOUND TO THE EAR

13. How a trumpet works! http://www.youtube.com/watch?v=olA3Trg nK7o&safety_mode=true&persist_safety_ mode=1&safe=active http://www.youtube.com/watch?v=olA3Trg nK7o&safety_mode=true&persist_safety_ mode=1&safe=active

14. How a drum works! http://www.youtube.com/watch?v=jR17iCb MMOA&safety_mode=true&persist_safety _mode=1&safe=active http://www.youtube.com/watch?v=jR17iCb MMOA&safety_mode=true&persist_safety _mode=1&safe=active

15. How an electric guitar works! http://www.youtube.com/watch?v=lBAZep M5F_0&safety_mode=true&persist_safety _mode=1&safe=active http://www.youtube.com/watch?v=lBAZep M5F_0&safety_mode=true&persist_safety _mode=1&safe=active

16. How a cell phone works! http://www.youtube.com/watch?v=xv9dRE NgDoc&safety_mode=true&persist_safety _mode=1&safe=active http://www.youtube.com/watch?v=xv9dRE NgDoc&safety_mode=true&persist_safety _mode=1&safe=active

17. REVIEW SOUND TRAVELS IN ___________ The higher the amplitude, the _________ the sound The higher the frequency, the __________ the pitch

18. REVIEW In what medium does sound travel fastest? Solid, liquid or gas Sound is usually measured in _________. Humans hear from _____ to ______ Htz

19. Label the parts of the waves

20. What did you learn today?