Chapter 7 & 8

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