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4 Written questions

4 Multiple choice questions

  1. Driven by the sun. Changes from liquid to gas to liquid again.
  2. Free nitrogen can not be used so it has to become fixed. Bacteria perfoms this function.
  3. Animal that gets eaten.
  4. Occurs after a disturbance in an already existing ecosystem. First species to appear are weeds/grasses.

3 True/False questions

  1. Food WebA food web has multiple (many) paths in which energy flows in an ecosystem. The arrow points in the direction energy goes!

          

  2. Primary SuccessionOccurs after a disturbance in an already existing ecosystem. First species to appear are weeds/grasses.

          

  3. Origin of LifeDriven by the sun. Changes from liquid to gas to liquid again.

          

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