Waves Crossword Puzzle

2. the unit of the frequency
4. a mechanical wave that propagates along the interface between differing media
8. the bottom and lowest point of a transverse wave
10. diminution in the density of something, especially air or a gas
14. the length measured between crests in a wave
17. a wave that transfers energy through a medium
19. an elastic wave in the earth produced by an earthquake or other means
20. a moving body of water
21. the 1st of two waves, called the p wave, usually arrives 1st

1. a wave vibrating in the direction of propagation
3. when something starts to shake or move
4. a tool used to measure and take data on
5. the tip and highest point of a transverse wave
6. something being pushed or composed together
7. the 2nd of two waves, called the s wave, usually arrives 2nd
9. a wave vibrating at right angles to the direction of its propagation
11. the maximum extent of a vibration or oscillation, measured from the position of equilibrium
12. the number of waves that passed one point in a minute
13. a massive wave usually caused by earthquakes or volcanic eruptions, very dangerous
15. the throwing back by a body or surface of light, heat, or sound without absorbing it
16. a substance that makes possible the transfer of energy from one location to another, especially through waves.
18. the power used in things such as creating light, heat, etc.