Ecology Key Terms Crossword

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Across
  1. 1. a process that releases energy from organic molecules in the presence of oxygen
  2. 3. non living part of an ecosystem
  3. 5. a chemical needed for all living things to survive
  4. 7. the home of an organism
  5. 12. the hard part of the Earth's surface
  6. 15. the gases that surround the Earth
  7. 17. the process in which an organism converts sunlight into energy
  8. 19. the living parts of an ecosystem
  9. 20. what it's called when nutrients in aquatic ecosystems increase and cause increase in population
  10. 21. a category of organisms that is defined by how the organisms gain their energy
  11. 22. an atmospheric gas that prevents heat from leaving Earth's surface
Down
  1. 2. an ecosystem that can withstand pressure and providing support
  2. 4. rain, snow or fog that is unnaturally acidic
  3. 6. land based ecosystem
  4. 8. the total mass of living organisms in a defined group or area
  5. 9. the regions of Earth where living organisms exist
  6. 10. the warming of Earth as a result of greenhouse gases
  7. 11. a process in which an organism ingests materials faster than it eliminates them
  8. 13. a process that releases energy from organic molecules in the absence of oxygen
  9. 14. a water-based ecosystem
  10. 16. all the interactive parts of a community & environment
  11. 18. all water on Earth