Unit 3 Vocabulary

4. The speed at which a wave travels; speed depends on the medium.
6. A signal wave that varies continuously with a gradual up-and-down pattern.
9. The time required for one cycle.
10. The material through which a wave travels.
14. An artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.
15. A measure of how far the particles in the medium move away from their normal rest position.
17. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling.

1. The distance from any point on a wave to an identical point on the next wave.
2. A wave that requires a medium through which to travel.
3. The number of cycles, such as waves, in a given amount of time.
5. A wave, consisting of changing electric and magnetic fields, that is emitted by vibrating electric charges and can travel through a vacuum.
7. A surface containing points affected in the same way by a wave at a given time.
8. A method of sending information from place to place between people or animals.
11. A signal wave that varies step-wise with an abrupt up-and-down pattern.
12. A unit of frequency equal to one cycle per second.
13. A wave in which the particles of the medium vibrate parallel to the direction of wave motion.
16. A disturbance that transfers energy from one place to another.