Across
- 2. a force that pulls objects to the Earth
- 4. a nearly complete circle; a hump
- 8. a massive ball of burning gas
- 9. these last forever on the moon because there is no atmosphere
- 10. growing
Down
- 1. the amount of stuff in an object
- 3. a half moon that is near the end of its lunar cycle
- 5. to circle a planet or star
- 6. when a huge star explodes
- 7. the first person to walk on the moon