waves

6. a wave that travels through empty space or through matter
8. the unit used to measure sound intensity or loudness
9. a wave that can travels through empty space or through matter
11. a material that allows almost all of the light strikeing it to pass through and through witch objects appear clear
12. an electromagnetic wave with a slightly shorter wavelength and higher frequency than light
15. the region of a longtitutial wave where the particles are farthest apart
17. the change in direction of a wave as it changes speed moving from one medium to another
19. a low frequency low energy electromagnetic wave that has a wavelength longer than about 30cm

1. a wave that travels through a medium and vibrates in the same direction
2. the region of a longitudinal wave where the particles of a meadium are closest together
3. the percition of how high or low a sound seems
4. a material that allows most of the light that strikes it to pass through nut through witch objects appear blurry
5. travels through a medium and are longitudinal micanical waves
7. the maxima distance a wave varies from its rest position
10. the number of wavelength that pass o point each second
13. the amout of energy that passes through a square meter of space in one second
14. a material through witch light does not pass
16. an eletricmonatic wave with a wavelength shorter than a microwave but longer than light
18. a wave in witch the disturbance is perpendicular to the direction the wave travels in