Science unit

2. A material through which a wave travels
9. In compressional waves, the dense area of the wave.
12. In compressional waves, the less dense area of the wave.
13. The ability of two or more waves to combine to form a new wave.
14. Occurs when a wave strikes an object and bounces off.
15. In a wave, the distance from the rest position of the medium to either the crest or trough.

1. The distance between identical points on two adjacent waves; for
3. a wave that requires a medium to travel
4. The number of wave crests that pass a point during one second; expressed in hertz.
5. The highest point of a wave.
6. a wave that appears to stand in one place, even though it is really two waves interfering as they pass through each other
7. A type of wave where the medium moves at the right angles to the direction of the waves traveling
8. a wave that moves a medium in a direction parallel to the direction in which the wave travels.
10. the lowest point of a wave.
11. The bending of waves around a barrier.