Ecosystems Crossword Puzzle

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Across
  1. 3. a sequence do organisms, each feeding on the next, showing how energy is transferred from one organism to another
  2. 4. the zone around earth where life can exist
  3. 5. all living things and their physical and chemical environment
  4. 7. an organism that makes its own energy-rich food compounds using the suns energy
  5. 9. visible forms of radiant energy
  6. 11. all non-living things in an ecosystem
  7. 12. an ecosystem that is maintained through natural process
  8. 18. the process by which sugar and oxygen is converted into carbon dioxide and water, to provide energy for the cell
  9. 20. the layer of gasses surrounding the earth
  10. 21. a representation of the feeding relationship within a community
Down
  1. 1. the level of an organism in an ecosystem depending on its feeding position along a food chain
  2. 2. an organism that obtains its energy from consuming other organisms
  3. 6. the process in which the sun's energy is converted into chemical energy
  4. 8. that travels through empty spaces
  5. 10. the form of energy transferred during heating and cooling
  6. 13. the function of a species serve in its ecosystem
  7. 14. the maximum population size of a particular species that a given ecosystem can
  8. 15. the ability to maintain an ecological balance
  9. 16. all living things in an ecosystem
  10. 17. all of earths water is solid, liquid and gas form
  11. 19. earth's solid outer layer