1. 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt Sound

2. A shock wave produced by an object traveling faster than the speed of sound.

3. Sonic boom

4. A series of vibrations you can hear.

5. Sound

6. Moving areas of high and low pressure.

7. Sound waves

8. A measure of the sound energy reaching your ear.

9. Loudness

10. A measure of how high or low a sound is.

11. Pitch

12. The speed at which sound waves travel.

13. Speed of sound

14. An area where air is pushed together.

15. Compression

16. The distance from one sound wave compression to the next.

17. Wavelength

18. A sound reflection.

19. Echo

20. Shown by height on a wave diagram.

21. Amplitude