Across
- 4. matter in the medium moves forward and backward along the direction the wave travels.
- 5. distance between two crests and two troughs.
- 7. a rhythmic disturbance that carries energy but not matter.
- 8. the lowest point of a wave.
- 9. waves that can travel through matter and space.
Down
- 1. number of wavelength that pass a given point in one second; measured in hertz.
- 2. wave energy that causes matter in the medium to move up and down to the direction it travels.
- 3. One half the distance between a crest and trough.
- 5. the measurement from crest to trough.
- 6. the highest point of a wave.