Chapter 7 & 8 Crossword

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Across
  1. 6. The time it took for the ocean to form
  2. 10. Located at 180 degrees longitude.
  3. 12. Occurred 15 billion years ago.
  4. 13. Ocean that connects the polar waters.
  5. 14. Theory of how stars and planets were formed.
  6. 16. What stars are made of.
  7. 17. One nautical mile per hour.
  8. 18. The release of volatile substances and water vapor.
  9. 20. The prime meridian runs through this place(not the city).
  10. 23. Why stars twinkle.
  11. 24. The year the UN established major boundaries.
  12. 25. Name of the city the prime meridian runs through.
  13. 26. The galaxy earth belongs to.
  14. 27. Ocean that covers 30.5 percent of earth.
  15. 28. Map with most accurate representation of the features of the earth.
  16. 29. When a star's core collapses in an explosion.
  17. 31. Huge rotating aggregation of stars, dust, and gas held together by gravity.
Down
  1. 1. Map that distorts continents as little as possible by not slicing into them.
  2. 2. A line of latitude.
  3. 3. The warmest ocean, also used as a trade route between Africa and Asia.
  4. 4. Map most commonly seen in classrooms, have become extremely accurate due to technology.
  5. 5. The smallest and coldest ocean.
  6. 7. What a star becomes when it runs out of helium and swells up
  7. 8. continent of the south pole.
  8. 9. A cloud of cold dust and gas in a galaxy.
  9. 11. There are 60 of these in one degree.
  10. 15. 5.5 percent of ice coverage.
  11. 19. A map maker.
  12. 21. The process the planets formed through.
  13. 22. The width of a time zone.
  14. 30. Its southern border marks the boundary between North and South America.