sound waves

2. a material that allows almost all of the light striking it to pass through and through Witch object that is
7. the change in direction of a wave as it changes speed moving from one medium into another is called
8. a material through witch light dose not pass is
10. the perception of how high or low a sound seems
11. the region of a longitudinal wave where the particles of the medium are closest together
12. a wave in which the disturbance is perpendicular to the direction the wave travels
13. a material that allows most light that strikes it to pass through but through witch objects appear blurry
15. a wave that travels only through matter is a

1. a wave that makes the particles of a medium move back and forth parallel to the direction the wave direction
3. a wave that can travel through empty space or matter is an
4. the unit used to measure sound intensity or loudness
5. the region of a longitudinal wave where the particles are farthest apart
6. the number of wave lengths that pass a point each second is a waves
9. the maximum distance a wave varies from its rest position
14. a low frequency low energy electromagnetic wave that has a wave length longer than 30 cm is called
16. the amount of energy that passes through a square meter of space in one second