7.1 Crossword

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Across
  1. 2. the spread of desert like conditions
  2. 4. cycle the various stages of an organisms development and reproduction
  3. 5. a major ecological community such as grassland, tropical rain forest, or desert
  4. 8. transfer the transfer of energy from one organisms to another through a food chain or web
  5. 12. chain a model that shows one set of feeding relationships among living things
  6. 14. a large category of animal is without backbones
  7. 16. The many different types of life that exist in an environment
Down
  1. 1. relationship between organisms in which one depends on the other
  2. 3. all the living and nonliving things that surround an organisms
  3. 6. an animal's natural response to a stimulus
  4. 7. Forest a forest that is humid and rainy for much of a year
  5. 9. consists of living and non living things in their environment
  6. 10. Web a model that shows many different feeding relationships among living things
  7. 11. Diversity the presence of many different types of organisms in an ecosystem
  8. 13. the many different types of life that exist in an environment
  9. 15. the location in which an organism lives
  10. 17. the ability to do work or cause change