Across
- 3. not a planet
- 8. Mercury's not dense air prevents______retention
- 9. Mercury's revolution around Sun is __days
- 10. another word for atmosphere
- 12. the Sun looks ____times bigger on Mercury
- 14. solid land
- 16. its gravity affects Mercury having a moon
- 17. Mercury's temperature can reach up to _______ degrees Fahrenheit
Down
- 1. Mercury is very ________ at night
- 2. layer of gases around planet
- 4. must be a sphere
- 5. has one Moon
- 6. also has no moons
- 7. rocky planet besides Earth
- 11. has no moons
- 13. revolves around a planet
- 15. Mercury has very __________atomosphere