Science

1. the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced.
8. A division of geologic time that is longer than an epoch and shorter than an era
9. Wave a wave that is an oscillation of matter and is responsible for the transfer of energy through a medium
14. diminution in the density of something, especially air or a gas.
15. a wave vibrating in the direction of propagation.
16. The highest surface part of a wave

2. the reduction in volume (causing an increase in pressure) of the fuel mixture in an internal combustion engine before ignition.
3. The material through which a wave travels
4. waves that are created as a result of vibrations between an electric field and a magnetic field
5. a wave vibrating at right angles to the direction of its propagation.
6. the lowest point in the wave
7. the throwing back by a body or surface of light, heat, or sound without absorbing it.
10. the distance between two successive crests or troughs of a wave
11. the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position
12. the fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.
13. the number of waves that pass a fixed place in a given amount of time