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Across 1. Earth is the __ largest planet. 3. Earth is the___ planet from the sun. 4. It takes Earth _____ hours to rotate on it's axsis. 7. Earth is ____ covered with ocean. 8. _____________ may have held life long, long, ago. 9. Mars has __________ moons. 14. Earth has an atmosphere that protects it from meteors. 15. Mars has _________ rich. 19. The Earth was in it's last present position in the ______ at the beginning of the Dinosaurs. 20. Mars is most likley to hold life besides _________. 21. Mars has polar ice and ____________. 22. Mars is the ___________ planet from the sun. 23. They also belive that the dryness of the soil the chemistry prevent __________ on Mars 24. The first official satilite of Earth was ___________.

Down 2. Mars has the largest volcano in the solar system called _________. 4. Water ice was found on Mars on June _________. 5. It takes Earth _______ days to rotate around the sun. 6. Earth ___ support life. 10. Earth's ________ hold the most life. 11. Mars is most like _________ than any other planet. 12. Mars is known as the ___________. 13. Earth is the largest of the inner planets. 16. Earth's atmosphere is mostly made of ___ and nitrogen. 17. Earth is the only planet with _______ water. 18. _______ is the only planet that is known to have life.