Across
- 1. Mariner 10 and MESSENGER are a type of _______
- 2. What is the surface covered with?
- 3. A birthday on Mercury would happen every ____ months.
- 5. Mercury doesn't have any___________
- 8. The name of one of the craters on Mercury.
- 11. Mercury can complete one _______ around the sun in 88 Earth days.
- 12. Mercury is the ______ planet to the sun.
Down
- 1. Mercury only has one ______ every 180 Earth days.
- 3. Mercury can be seen without using a __________
- 4. Venus, Earth, Mars, and Mercury are all ______ planets
- 6. Compared to all the planets, Mercury is the ________.
- 7. What is the hottest planet in the solar system?
- 9. Mercury's size is bigger than the moon of _____
- 10. What kind of atmosphere does Mercury have?