Across
- 3. The change in frequency or wavelength due to a moving source or observer.
- 5. A type of wave that travels through Earth during an earthquake.
Down
- 1. The distance between two consecutive crests or troughs in a wave.
- 2. The number of wave cycles that pass a point in one second.
- 4. The perception of how high or low a sound is.
- 6. The distance an object travels per unit of time.