Across
- 4. Imaginary line straight through something
- 5. Spring, summer, fall, and winter
- 9. Taking turns or changing back and forth
- 12. Shadow made on the Moon by the Earth
- 14. Tool invented to keep track of time
- 15. Revolves in a way that is controlled by gravity
- 16. Hump shaped phase of the Moon
- 17. Moves in a path around another object
- 18. Daily changes in the height of water along coasts
- 19. A force that pulls things together
Down
- 1. Phases of the Moon that are getting smaller
- 2. Moon phase where you see half of the lighted surface
- 3. Thin curved slice phase of the Moon
- 5. Shadow made on the Earth by the Moon
- 6. Phases of the Moon that are getting bigger
- 7. Regular changes in how the Moon looks from Earth
- 8. Shadows caused by the Earth or Moon
- 10. Slanted or tipped
- 11. A push or a pull
- 13. Object that orbits a planet
- 17. Spins on an axis