Across
- 2. Matter; solids, liquids, and gases
- 6. Waves that travel parallel to the source
- 9. Waves that travel through water
- 10. The number of wave cycles in a given amount of time
- 12. A wave that needs a medium to travel
- 13. Ocean waves caused by wind
- 14. Waves that travel perpendicular to the source
- 16. Waves that travel through the air
Down
- 1. Low pressure areas with particles spread apart
- 3. From the midpoint to the top of a crest
- 4. Waves that travel through solids, like the Earth's crust
- 5. The direct center between a crest and a trough
- 7. The distance from crest to crest
- 8. High pressure areas with particles clumped together
- 11. The highest point of a wave.
- 15. The lowest point on a wave