Geology Crossword Puzzle

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Across
  1. 3. same structures
  2. 4. types of bone placement in animals
  3. 9. gases gases around the earth that trap in heat
  4. 11. species dying off
  5. 12. cutting down trees to make land
  6. 14. warming melting ice caps, extinction of polar animals
Down
  1. 1. similar structures
  2. 2. a record of all fossils and extinct animals
  3. 5. layers of rock that show
  4. 6. study of the earth
  5. 7. core middle of an ice burg that shows time
  6. 8. not needed anymore structures
  7. 10. prehistoric organism preserved in petrified form
  8. 11. the process by which different kinds of living organisms are thought to have developed
  9. 13. unborn or unhatched offspring