Across
- 3. parallel to the direction of energy transfer
- 5. perpendicular to the direction of waves
- 7. A decrease in a density of something
- 9. force or power
- 10. low point
Down
- 1. distance from rest point to trough
- 2. the number of a complete wave passing a point in one second
- 4. A region where particles are closer together
- 6. One crest to another
- 8. top