Chapter 8 Crossword Puzzl

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Across
  1. 4. Release of volatile substances and water vapor from the earth is called
  2. 6. what is a sun
  3. 8. Stratification responsible for the formation of earths gravitational field
  4. 9. most abundant element after big bang theory
  5. 10. first known type of organism on earth
  6. 11. Stars twinkle because of elements being converted over to other elements which gives off
  7. 14. how many years heavy rain it earth
  8. 15. Explosion of a star
  9. 16. Dominant scientific theory that occurred 15 billion years ago that formed the universe
  10. 17. Earth was formed
Down
  1. 1. where most bacteria probably originated
  2. 2. what did Hubble discover
  3. 3. Way our galaxy is known as
  4. 5. building blocks of proteins
  5. 7. in 6 billion years the sun will turn into
  6. 12. a minute planet
  7. 13. suggested that energy from thermal vents go into sea