Across
- 2. when half of the moon appears illuminated
- 4. needed to find the density of an object
- 7. when the moon appears fully lit
- 8. When an object circles around another object
- 9. a large object that orbits Earth
Down
- 1. star that keeps all the planets in orbit
- 3. takes one month
- 5. Moon is not visible from Earth
- 6. the amount of mass in a given area or space
- 9. amount of matter in an object