Environment

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Across
  1. 4. acute water shortage
  2. 6. feeding relationships between species
  3. 7. low levels of oxygen
  4. 8. rain rain that is acidic
  5. 10. water converted to water vapor
  6. 12. the cessation of existence of a species
  7. 14. external conditions with which organism interacts
  8. 15. natural occurring mixture of hydrocarbons
  9. 17. species at risk of becoming extinct
Down
  1. 1. habituate of a species within its population
  2. 2. the diversity of life in all its forms
  3. 3. displacement of soils
  4. 5. land used for growing crops
  5. 8. non living chemical and physical factors of environment
  6. 9. requires air or oxygen
  7. 11. receives very little rain
  8. 13. the functional unit of all known living organisms
  9. 16. semi enclosed body of water