Whodidin

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Across
  1. 3. when water is excreted from a plant in gas form.
  2. 6. the region on, above, and below the Earth's surface where life exists.
  3. 7. the study of life
  4. 11. when an animal uses another for its benefit, and doesn't affect the other.
  5. 12. when an animal uses another for its benefit, and the other is affected negatively.
  6. 14. the movement of carbon.
  7. 15. when an animal hunts another animal.
Down
  1. 1. when an animal uses another for its benefit, and the others benefit too.
  2. 2. examples: coal, oil, natural gas.
  3. 4. when water turn into a gas
  4. 5. the movement of water.
  5. 8. relating to the natural world and the impact of human activity.
  6. 9. someones view or opinion on something.
  7. 10. when two animals compete for a resource.
  8. 13. a smoke like fog.