Ch 3 ECOSYSTEMS

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Across
  1. 3. can capture energy from nonliving sources and convert it into forms living cells can use
  2. 5. plants/primary producers harness solar energy along with CO2 and water to make useable energy/food for the plant
  3. 6. each step in a food chain or food web
  4. 10. model the relative amount of energy or matter contained at each trophic level
  5. 11. amount of living tissue within a trophic level
  6. 13. elements organisms use to sustain life
  7. 14. series of organisms in which energy is transferred from one organism to another
Down
  1. 1. when chemical energy powers production of carbohydrates
  2. 2. primary producers are tiny floating algae
  3. 4. autotrophs store energy in ways that make it available to other organisms
  4. 7. heterotrophs that eat other animals to get energy are called
  5. 8. network of feeding interactions through which both energy and matter move through is called
  6. 9. any nutrient whose supply little productivity is called
  7. 12. acquire energy from eating other organisms