Life crossword puzzle

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