Across
- 1. How often a wave repeats in one second
- 4. Wave where movement is along the direction of travel
- 5. When a wave bounces off a surface
- 8. Part where particles are spread out
- 11. Part where particles are squeezed together
- 12. Distance between two wave peaks
- 13. Move back and forth in a regular way
- 14. When a wave passes through something
- 15. Wave that can travel through empty space
Down
- 2. Reflected sound you can hear
- 3. Shake quickly back and forth
- 6. Wave where movement is up and down
- 7. Wave that needs matter to move
- 9. Height of a wave from middle to top
- 10. When a wave bends as it enters something new