1. Sound Waves

2. Sound waves move out in a circular pattern.

8. Sound waves look like circles rippling out but under closer investigation they look like this:

9. This is a wave created by a high note.

10. Notice that the high sound wave is close together

11. This is a wave created by a low note.

12. Notice that the low sound wave is far apart.

13. High and Low sound waves A high sound waveA low sound wave

14. High and low waves are the same height. Notice that the high wave is close together and the low wave is far apart.

15. Soft and Loud Sound Waves A soft sound waveA loud sound wave

16. Soft and loud sound waves together. Notice that the waves are the same only one is taller.