CH. 3 and 4 Ecology X-Word

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Across
  1. 3. process by which bacteria convert N2 gas into NO2 and NO3
  2. 4. organisms that obtain energy by consuming other organisms
  3. 7. all ecosystems on Earth
  4. 8. process by which water leaves the Earth and returns to the atmosphere
  5. 11. process in which autotrophs convert inorganic compounds into energy
  6. 13. only nutrient cycle that does not involve the atmosphere
  7. 15. living components of an ecosystem
Down
  1. 1. organisms that break down dead organic matter into simpler compounds
  2. 2. organisms that synthesize their own food
  3. 5. major reservoir for the water cycle
  4. 6. enzyme required for the process of denitrification
  5. 9. reservoir for carbon
  6. 10. diagram showing the transfer of energy from one organism to another
  7. 12. community of organisms and their physical environment
  8. 14. consumers that feed on dead animals