Chapter 7 & 8 Crossword

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Across
  1. 3. What is the name of the continent of the South Pole?
  2. 4. How many years ago did the Big Bang Theory occur?
  3. 9. the action of finding one's way by observing the sun, moon, and stars CelestialNavigation
  4. 15. How long did it have to rain to create the oceans?
  5. 17. What is the primary reference line of latitude?
  6. 19. What general shape is the Earth?
  7. 21. What is the imaginary line running mostly along the 180 degree Meridan called?
  8. 22. What is the political boundary that separates North and South America?
  9. 23. What will the Sun become 6 billion years from now?
  10. 25. What color can penetrate the Ocean waters the deepest?
  11. 26. What is the reference line drawn around the Earth that connects the poles?
  12. 27. Distorts the continents little as possible by not slicing into them
  13. 29. What were the first organisms on Earth?
Down
  1. 1. How long did the accretion period last?
  2. 2. What caused it to rain on Earth?
  3. 5. Why do stars twinkle?
  4. 6. A map most commonly seen in classrooms, have become extremely accurate due to technology
  5. 7. Looks similar to wedges by dividing the area into equal sections?
  6. 8. What are imaginary lines forming half circles passing from the North Pole to the South Pole Called?
  7. 10. What is cloud of cold dust and gas within a galaxy called?
  8. 11. Which ocean connects the Polar waters?
  9. 12. How stars and planets were formed
  10. 13. What is half of the Earth south of the equator called?
  11. 14. Iron sunk to the middle of the plant, and lighter minerals migrated to the surface forming the Earth’s Crust
  12. 15. What percentage of the Earth is covered with ice?
  13. 16. What is the imaginary reference lines that form complete circles around the Earth parallel to the equator and each other?
  14. 18. Lines of latitude are known as what?
  15. 20. The Prime Meridian by an international agreement was drawn through where?
  16. 24. Earth belongs to what galaxy?
  17. 28. What is it called when a star blows up?