Ecosystems

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Across
  1. 4. a substance that an organism needs to grow and maintain its body
  2. 5. _____ element; these are the living factors in an ecosystem
  3. 6. you need a microscope to help you see this living thing
  4. 8. a species that lives in one given area
  5. 9. study of relationships between organisms and their environment
  6. 10. interactions between abiotic and biotic elements that make up an environment
Down
  1. 1. _____ element; these are the nonliving factors in an ecosystem
  2. 2. the environment where an organism lives
  3. 3. a group of populations of different species in an area
  4. 7. similar living things that can reproduce
  5. 11. a living thing