Across
- 5. Change in position
- 7. The path to go somewhere
- 8. The title of this crossword
- 9. Smallest unit of matter
- 12. Amount of force applied to something
- 14. The distance between wave crests
- 17. Form of a circle
- 18. The earth is mostly made up of this
- 20. Relates to heat
Down
- 1. Lacks depth
- 2. sensation of hearing
- 3. How often something happens
- 4. Anything that takes up space
- 6. A back-and-forth motion
- 10. Mass in motion
- 11. Extending or lying across
- 13. Another word for air
- 15. Two lines intersecting at a point
- 16. Ability to do work
- 19. The height of a wave