Waves

2. the units used to measure intensity of sound waves
5. a disturbance that moves through matter or space
6. is the SI unit for frequency
7. the distance from one wave of energy to another as it is traveling from one point to another point
9. is the places where the coils are squeezed together
12. an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other
13. the amount of energy that a wave carries past a certain area each second
16. a mechanical wave that causes particles in matter to move back and forth along the direction the wave travels
17. the number of wavelengths that pass by a point each second
18. is half the distance between a crest and trough
20. an object that the wave travels through( solids, liquids, gas)

1. is the change in direction of a wave
3. is the highest point in the wave
4. is the bending of waves around an object
8. is the human perception of the frequency of sound
10. repeated echoes
11. waves that can travel through matter and empty space, includes radio waves, infrared waves, visible light waves, ultraviolet, x-rays, gamma rays
14. a mechanical wave that causes particles matter to move at right angles to the direction the wave travels
15. is the places where the coils are spread apart
19. is the lowest point in the wave