Across
- 4. The movement of one object around another
- 5. The imaginary line that passes through Earth's center
- 7. When the Earth is directly between the moon and the sun
- 13. The very darkest part of the moon
- 14. The rise and fall of ocean water that occurs every 12.5 hours
- 15. A chunk of rock or dust from space
- 16. When an object comes between the sun and a third object
- 18. The study of the moon, stars, and other objects in space
- 19. A push or pull
- 20. The force of gravity on an object
Down
- 1. Attracts all objects toward each other
- 2. When the noon sun is directly overhead at the equator
- 3. When a new moon blocks your view of the sun
- 6. Causes the universe to fall apart faster and faster
- 8. When the sun is farthest north or south of the equator
- 9. Amount of matter in an object
- 10. A system of organizing time
- 11. The larger part of the moon's shadow
- 12. Circular path aroun an object
- 17. Tendency of an object to resist change in motion