Chapter 7 & 8 Crossword

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Across
  1. 1. What are scientists able to calculate from the radioactive elements found in a meteorite that decay at a particular rate
  2. 6. What is the smallest of the continents
  3. 7. What color can penetrate the Ocean waters the deepest?
  4. 9. What is the largest ocean on earth
  5. 10. Our galaxy is the spiraled what?
  6. 11. what had a beginning
  7. 13. Lines of Latitude are also known as?
  8. 14. what is the continent bordered to the north by the Mediterranean Sea?
  9. 16. how stars and planets were formed
  10. 18. What is the continent at the South Pole?
Down
  1. 2. Huge rotating aggregations of stars, dust, and gas held together by
  2. 3. stars are formed in a what?
  3. 4. Big Bang Theory occured?
  4. 5. What planet is believed to have once had a magnetic field that disappeared when the planets iron core cooled?
  5. 7. what object was used to chart the direction of surface currents
  6. 8. A massive sphere is created by?
  7. 12. What is the primary reference line of latitude
  8. 15. Giant the body of star swells into a what?
  9. 17. What is the smallest ocean on earth