science

1. A disturbance that travels through a medium from one place to another.
5. The height of the crest in a transverse wave; a measure of how compressed the compressions are in a longitudinal wave.
6. The change in direction of a wave when it enters a new medium with a different wave speed.
8. of Wave The distance a wave travels (crest, trough, crest) in a given period of time. Can be calculated by multiplying wavelength by frequency.
10. Wave A wave that causes a medium to vibrate in a direction perpendicular to the direction in which the wave travels.
11. Region of a longitudinal wave where the particles of the medium have the highest density.
12. Wave A wave that causes a medium to vibrate in a direction parallel to the direction in which the wave travels.
13. The time required to complete one cycle of a wave.
14. A tiny particle or packet of light energy.
16. Wave A transfer of energy through a medium without a transfer of the medium.
18. The material through which a mechanical wave travels.
21. The amount of electricity, light, heat, or sound energy per unit area per unit time.

2. Space that contains no matter (Outer space).
3. 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.
4. The ability of a wave to spread out or change direction as it passes through an opening or around an obstruction.
7. A measurement used to compare the intensity of different sounds. Each increase of 10 decibels is a
8. intensity 10 times greater.
9. Radiation Radiant energy that can travel through a vacuum and through matter in the form of waves.
15. When the medium and energy in a wave is turned back from a hard surface.
17. How high or low a sound is.
19. Caused by an earthquake or vibrations inside Earth.
20. The number of crests or compressions in a wave that pass a point per unit time; for sound waves, measured in hertz.