Across
- 2. ocean covered by ice
- 6. earths galaxy
- 8. used to measure speed
- 11. smallest continent
- 13. navigation of ships based of celestial bodies
- 14. late state of evolution
- 16. why stars twinkle
- 18. a half of the earth
- 20. major shipping ocean
- 22. injection of gasses into the earths atmosphere
- 25. includes greenland,mexico and canada
- 26. land covered by ice
- 27. earth covered by ice
- 28. known as northern sea
Down
- 1. earths accretion
- 3. earths formation
- 4. type of boundary UN established
- 5. includes all countries south of panama
- 7. imaginary line running through the earth on which the earth rotates
- 9. unit used in measuring distance at sea
- 10. how long it rain to form the oceans
- 12. explains the composition of earth
- 15. continent of the south pole
- 17. person who produces maps
- 19. largest ocean
- 21. single continuous land mass that includes Europe and Asia
- 23. explosion of a star
- 24. term of tradition
- 27. UN established major boundaries
- 29. cloud of gas in outer space