Crossword Puzzle

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Across
  1. 3. organisms that make their own food and form the first trophic level.
  2. 5. What do we call the living organisms and their surroundings interacting together?
  3. 8. What term describes how living things depend on one another for survival?
  4. 9. cascade What happens when a change at one trophic level causes effects across several other trophic levels?
Down
  1. 1. level What do we call the position an organism occupies in a food chain?
  2. 2. What process removes carbon dioxide from the atmosphere when plants and algae use it to make food?
  3. 4. type of organism that eats plants
  4. 6. In the example “Wolves changed rivers”, wolves are an important ________ in the food web.
  5. 7. chain What do we call the movement of energy from one organism to another through feeding?