Chapter 7 & 8 Crossword

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Across
  1. 2. What general shape is the earth
  2. 6. What had a beginning?
  3. 8. What are the smallest types of organisms found in the ocean?
  4. 10. What aggregations of gas and dust which may be several hundred kilometers in diameter.
  5. 13. Whos experiment was in 1953
  6. 16. What planet is believed to have once had a magnetic field that dissappeared when the planet's iron core cooled?
  7. 18. what type of layer protects us from UV
  8. 19. what is the largest ocean basin
  9. 22. What ocean has Eurasia as its northern boundary and Africa as its western boundary
  10. 23. massive spheres of what?
  11. 24. Every chemical element that made the planets, stars, oceans, and organisms is made up of what?
  12. 27. Distance from the sun allows for what?
  13. 29. What occurred everywhere and caused massive clouds in upper atmosphere
  14. 30. Our galaxy is the spiraled what?
Down
  1. 1. What are scientists able to calculate from the radioactive elements found in a meteorite that decay at a particular rate?
  2. 3. what type of force is right
  3. 4. What object was used to chart the direction of surface currents
  4. 5. What is the continent at the south pole
  5. 7. Iron sunk to the middle of the planet?
  6. 9. Lines of latitude are also known as what?
  7. 11. What provide for gentle tides?
  8. 12. As the star converts more H into heavier elements the energy outpust rises and the body of the star swells into a?
  9. 14. What is the continent border to the north by the Mediterranean
  10. 15. What type of object can give us information about the conditions in which the solid planets?
  11. 17. what is the smallest ocean basin
  12. 20. What color ocean can penetrate the ocean waters the deepest
  13. 21. What theory were stars and planets formed
  14. 25. The sun is a what?
  15. 26. What ocean extends from Antarctica to the Arctic ocean basin
  16. 28. What is the primary reference line of latitude?