Chapter 7 & 8 Crossword

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Across
  1. 1. cloud of cold dust and gas within a galaxy
  2. 5. Primary reference line of latitude
  3. 7. occurred 15 billion years ago and beginning of the universe
  4. 8. name of ancient super continent
  5. 9. Continent of the South Pole
  6. 10. saltiest sea
  7. 14. found that universe is still expanding
  8. 15. deepest points on Earth
  9. 16. 5.5% is covered in ice
  10. 17. how stars and planets were formed
  11. 20. clumping smaller particles into larger masses
  12. 23. general shape of the Earth
  13. 26. imaginary line running mostly along the 180 degree meridian
  14. 27. lines of latitude
  15. 30. star's core will eventually collapse in an explosion
  16. 32. political boundary separates North and South America
Down
  1. 2. Color that can penetrate the ocean water the deepest
  2. 3. Ocean that connects the Polar waters
  3. 4. release of volatile substances and water vapor and cause massive clouds in upper atmosphere
  4. 6. sunk to the middle of the planet and lighter minerals migrated to the surface forming Earth's crust
  5. 8. largest ocean, 1/3 of Earth's surface
  6. 11. this is why stars shine
  7. 12. the primary reference line drawn around the Earth that connects the poles
  8. 13. massive spheres of incandescent gas
  9. 18. distance measured by marine and air navigators
  10. 19. early steps of organisms forming from organic building blocks
  11. 21. type of motion an object floating in the water has
  12. 22. our galaxy is the spiraled
  13. 24. protects us from UV rays
  14. 25. where life arose
  15. 28. 4.5% is covered in ice
  16. 29. every chemical element that made the planets, stars, oceans, and organisms is made of this
  17. 31. Smallest, coldest,and is also known as the Northern Sea