Sound energy

1. the amount of waves that pass a point in a certain time
7. the amplitude of a sound wave determines its ________.
8. compressions are represented as _______ on a graph.
11. sound ________ travel through space.
12. the loudness of sound is measured by this scale.
13. the unit of frequency.
14. the height of a sound wave.
16. an area of low pressure in a sound wave.
18. sound energy travels slowest through _________ because the particles are far apart.

2. an area of high pressure in a sound wave.
3. the distance between two crest of a wave.
4. rarefactions are represented as troughs on a graph
5. the time taken for a wave to pass a certain point.
6. the ________ of a wave is a product of its wavelength and frequency.
9. sound energy travels fastest through ________ because the particles are close together.
10. the frequency of a sound wave determines its _______.
15. sound travels as a __________ wave as the particles vibrate in the direction of travel.
17. sound energy travels as a _________.