Across
- 2. rapid motion of the particles
- 4. form of radiation
- 7. water
- 8. waves that need a medium
- 9. non-periodic signal
- 10. length of a wave
Down
- 1. repeating
- 3. motion in which all points on a wave oscillate
- 5. vibration of the medium is parallel
- 6. travel more slowly through Earth material