Vocabulary

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Across
  1. 3. the property of having poles or being polar
  2. 6. the regions of the surface
  3. 8. variety of life in the world
  4. 10. the tension of the surface film of a liquid
  5. 13. living factors
  6. 14. an organism whose status in an ecosystem
  7. 16. nonliving factors
  8. 17. the activity or condition of competing
  9. 19. not allowing fluid to pass through
  10. 20. allowing liquids or gases to pass through it
Down
  1. 1. permeable rock that can transmit groundwater
  2. 2. the action or fact of forming a united whole
  3. 4. the action or process of adhering to a surface or object
  4. 5. liquid passing through a filter
  5. 7. the number of people, other living organisms
  6. 9. resources that limit growth
  7. 11. portion of land drained by a river
  8. 12. an area or ridge of land that separates waters
  9. 15. permeation of a liquid into something
  10. 18. a salt or ester of phosphoric acid