Chapter 9: Introduction to Waves

4. A wave pattern that forms when waves of equal wavelength and amplitude, but traveling in opposite directions, continuously interfere with each other; does not appear to be traveling.
5. Distance between one point on a wave and the nearest point just like it.
9. The number of wavelengths that pass a fixed point each second, is expressed in hertz (Hz).
10. The bending of waves around an obstacle; can also occur when waves pass through a narrow opening.
12. Matter through which a wave travels.
13. A measure of the size of the disturbance of a wave, related to the energy that it carries.
14. Denser region of a longitudinal wave.
17. A wave that can only travel through matter
19. The process by which an object is made to vibrate by absorbing energy at its natural frequencies.

1. The lowest point on a transverse wave.
2. A repeating disturbance that transfers energy as it travels through matter or space.
3. in which the matter in the medium moves at right angles to the direction of the wave, has crests and troughs.
6. A wave in which the matter in the medium moves back and forth along the direction that the wave travels.
7. The process of two or more waves overlapping and combining to form a new wave.
8. The highest point on a transverse wave.
11. A point in a standing wave at which the interfering waves always cancel.
15. The less-dense region of a longitudinal wave.
16. The amount of time it takes one wavelength to pass a fixed point; is expressed in seconds.
18. The bending of a wave caused by a change in its speed as it travels from one medium to another.