waves

2. The distance a wave travels in a given amount of time (wavelength x frequency).
5. Energy that travels through space in the form of waves, including radio waves, light, and X-rays.
6. A wave in which the vibration of the medium is parallel to the direction the wave travels.
8. The distance between two corresponding parts of a wave, such as crest to crest.
10. The bending or spreading of waves as they move around a barrier or through an opening.
12. When two waves combine to make a wave with a larger amplitude.
14. The material through which a mechanical wave travels.
15. An observed change in the frequency of a wave when the source or observer is moving.

1. When two waves combine to make a wave with a smaller amplitude.
3. The maximum distance the particles of a medium move from their resting position.
4. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling.
7. The bending of a wave as it passes at an angle from one medium to another.
9. The complete range of electromagnetic waves placed in order of increasing frequency.
11. The number of complete wavelengths that pass a point in a given time.
13. The bouncing back of a wave when it hits a surface through which it cannot pass.