Life crossword puzzle

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Across
  1. 2. collection of all organisms that live in a environment
  2. 4. the place where Darwin studied for evolution
  3. 6. subdivisions on the geological scale
  4. 7. unit of time which are are subdivided
  5. 9. process where chemical energy is used to make carbohydrates
  6. 14. scientific study of organisms interacting with other organisms and its environment
  7. 15. change in a kind of organism over time
Down
  1. 1. a group of heterotrophs that break down organic matter
  2. 3. organisms that get their energy from the sun
  3. 5. scientist who studies fossil
  4. 8. an organisms ability to survive and reproduce in its environment
  5. 10. feeding relationships among organisms in an ecosystem
  6. 11. chemical substance that an organism needs to live
  7. 12. preserved remains of ancient organisms
  8. 13. organisms that get their energy from other organisms