Sound and Light Energy

2. the number of crests or compressions in a wave that pass a point per unit time.
6. the amount of electricity, light, heat, or sound energy per unit area per unit time.
7. the distance a wave travels (crest, trough, crest) in a given period of time. Wavelength x frequency.
8. the height of the crest in a transverse wave; a measure of how compressed the compressions are in a longitudinal wave.
11. the distance between two crests OR two troughs in a transverse wave or between two compressions in a longitudinal wave
12. the high point of a transverse wave
14. the low point of a transverse the wave
15. a wave that causes a medium to vibrate in a direction parallel to the direction in which the wave travels; sound waves are longitudinal
16. a disturbance that travels through a medium from one place to another.
17. the time required to complete one cycle of a wave; from one crest to the next crest (or one trough to the next trough
18. transfer of energy without a transfer of material.

1. a wave that causes a medium to vibrate in a direction perpendicular to the direction in which the wave travels; light waves are transverse.
3. area of a longitudinal wave where the particles of the medium have the highest density
4. a measurement used to compare the intensity of different sounds; each increase of 10 decibels is a sound intensity 10 times greater.
5. to move back and forth
9. how high or low a sound is
10. the material through which a mechanical wave travels.
13. the spreading out of energy as it travels away from the source of the energy; the decrease in intensity as distance from an energy source increases.