Energy Flow and Cycling of Matter

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Across
  1. 6. ______________ bacteria are organisms that convert nitrogen in the air to a form that can be used by plants
  2. 8. Type of consumer that occupies the 3rd level of an energy pyramid
  3. 13. Process that plants, algae, and some bacteria use to make food using sunlight, carbon dioxide, and water
  4. 15. A substance in food that provides energy or helps form body tissues and is necessary for life and growth
  5. 16. Type of consumer that occupies the 2nd level of an energy pyramid
  6. 19. ______________ bacteria cause nitrogen in the soil to be released into the atmosphere as gas
  7. 21. One of the steps in a food chain or food pyramid
  8. 22. Most energy is lost as ________ when transferring through the trophic levels
Down
  1. 1. Gas that is produced from cellular respiration and released into the atmosphere
  2. 2. An environmental factor that is associated with or results from the activities of living organisms
  3. 3. Organism that gets energy by breaking down the remains of dead organisms or animal wastes
  4. 4. Amount of energy that transfers to the next trophic level
  5. 5. A food _________ is a a diagram that shows the feeding relationships between organisms in an ecosystem
  6. 7. Process by which cells use oxygen to produce energy from food
  7. 9. An environmental factor that is not associated with the activities of living organisms
  8. 10. Organism that eats other organisms
  9. 11. The product of cellular respiration that allows organisms to perform all life processes
  10. 12. A food _________ is a pathway of energy transfer through various stages
  11. 14. Organism that uses sunlight to make glucose
  12. 17. All _____________ break down sugar to get energy, and need energy to live.
  13. 18. Part of Earth where life exists
  14. 20. Organisms that assimilate nitrates so that nitrogen can enter the food web