Ch. 8 Puzzle

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Across
  1. 3. was the moon closer of farther when the earth was younger
  2. 5. what do stars form from
  3. 7. what object can give us information about the conditions earth
  4. 8. stars core will eventually explode causing a
  5. 10. every chemical element that made the planets is called
  6. 13. what planet is 4.6 billion years old
  7. 14. what period lasted 50 to 70 million years ago
  8. 16. the first organisms on earth were
  9. 18. what was the name of the earth when the outer layer was covered in molten
  10. 19. what was the name of small early planets
  11. 20. what theory occurred 15 billion years ago
  12. 21. our galaxy is named
  13. 23. what is the closest planet to earth
  14. 25. where did earth water collect when it was raining
  15. 26. how many million years did it rain for strait at the beginning of earth
Down
  1. 1. what was the farthest planet from the earth
  2. 2. what is the farthest planet from earth
  3. 4. the sun will turn into a what in 6 billion years
  4. 6. no kind of what water was not on earth
  5. 9. what processes formed the first clouds
  6. 11. blank of the clouds made heavy rain fall
  7. 12. there is more what than stars in the milky way
  8. 15. what type of element sank toward the center of earth
  9. 17. what point started the expansion of the universe
  10. 22. what makes up 71 percent of earth
  11. 24. what is about 92 miles from earth