Across
- 4. Mercury’s ____ is very thin.
- 6. Venus’ ____ is 243 days long.
- 9. On Venus _____ falls.
- 11. What does Mars have at its poles?
- 13. Venus’ surface is full of plains and ____.
- 15. Earth’s atmosphere contains nitrogen and ____.
- 16. Which planet’s atmosphere contains sulfuric acid.
Down
- 1. What is Earth’s surface divided into?
- 2. What is the third planet from the sun?
- 3. The ____ of Mars is 1.88 years.
- 5. Mars has little to no what?
- 7. Mercury’s rotation is fifty-eight ____ long.
- 8. The planet ____ takes eighty-eight days to revolve around the sun.
- 10. This planet has volcanoes and lava craters all over its surface.
- 12. Earth’s rotation is twenty-four ____.
- 14. What is Mercury’s core made of?