Across
- 4. a low density region where particles are spread out
- 5. the substance or material a wave travels through
- 9. a force that pushes or squeezes an object
- 10. the highest point of the wave
- 11. the height of a wave
- 12. the length of one complete wave cycle
Down
- 1. how often something happens or repeats itself
- 2. particles of a medium move parallel to the direction the wave is moving
- 3. a disturbance that transfers energy from one place to another
- 6. the lowest point of the wave
- 7. the medium vibrates up and down perpendicular to the direction of the wave
- 8. to move repeatedly from one position to another