chapter 8 crossword

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Across
  1. 3. our galaxy is known as the _______
  2. 7. is earths magnetic north pole slowing down or picking up speed?
  3. 9. degrees are divided into what smaller units
  4. 10. in 6 billion years, the sun will turn into _______
  5. 11. __________________is responsible for the formation of earths gravitational field
  6. 12. occured 15 billion years ago
  7. 14. how quickly the mood is moving away from earth
  8. 16. what lies at 90 degrees north latitude?
  9. 17. the release of volatile substances and water vapor from the earth is called ________
  10. 21. the planets solidified in a process known as _______
  11. 22. what type of object can give us information about the conditions in which the solid planets like earth formed?
  12. 23. ____ once had a magnetic field when the planets core cooled
Down
  1. 1. heavy rains fell for ______ years before the oceans were formed
  2. 2. experimenter from 1953
  3. 4. what brought water to earth?
  4. 5. ____ is ther explosion of a star
  5. 6. ________ of the clouds made heavy rains fall
  6. 8. _____ are tiny crystals formed from the beginning of earth
  7. 13. in 6 billion years the sun will burst and engulf other _________
  8. 15. The___is between 4.5 and 4.6 billion years old.
  9. 18. how many degrees are there in one hemisphere?
  10. 19. ____ sank towards earths center
  11. 20. ______ was most abundant in the universe after the big bang