chapter 7 and 8 crossword

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Across
  1. 5. 1.85km is equal to
  2. 10. When the Earth was liquid rock, what element sank towards earths center
  3. 13. United States, Mexico, and Canada
  4. 16. second largest ocean
  5. 17. Lines of latitude
  6. 19. Was the moon closer of farther when the Earth was younger
  7. 20. The most common map used in classrooms
  8. 21. Smallest continent
  9. 22. Political boundary that separates North and South America
  10. 23. General shape of the earth
  11. 25. Place where the primary reference line passes through
  12. 26. Distance measured by marine and air navigators
  13. 27. The center of this ocean is ice that is 10 feet deep
  14. 28. When the earth first formed, what was the earth like
  15. 29. The type of water scientists look for in comets and in the oceans to see if there proportions match
Down
  1. 1. Younger than the earth by millions of years
  2. 2. Believed to have once had a magnetic field that disappeared when its core cooled
  3. 3. Color that can penetrate the ocean water the deepest
  4. 4. America Everything south of Panama
  5. 6. imaginary line running mostly along 180 degrees meridian
  6. 7. Lines of Longitude
  7. 8. Earth is born
  8. 9. How quickly is the earth every year?
  9. 11. Distorts the continents as little as possible
  10. 12. Its axis is tilted at 23 1/2 degrees
  11. 14. Earths iron core protects the earth from
  12. 15. Name of the Earth when the outer surface was completely molten
  13. 18. Largest ocean in the world
  14. 21. Surrounded by the Mediterranean Sea, Indian Ocean, and the Atlantic Ocean
  15. 24. The continent of the South Pole