Ecosystems

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Across
  1. 5. A living factor of the environment
  2. 6. All the living organisms in an ecosystem
  3. 7. Where an organism lives
  4. 9. Relationship between organisms that are trying to use the same limited resource
  5. 10. Relationships between organisms, where each affects the other's survival
  6. 12. Relationship between two organisms, where one organism lives on or in the other and feeds off it
  7. 13. Relationship between two organisms living closely together, where each benefits the other
Down
  1. 1. All the factors in an organism's surroundings that affect it
  2. 2. A non-living factor of the environment
  3. 3. A place where organisms and their physical surroundings form a balanced environment that is different from others nearby
  4. 4. Relationship between two organisms, where one organism kills and eats the other
  5. 8. Relationship between two organisms, where one benefits and the other is unharmed
  6. 11. The study of how organisms interact with each other and their environment