Water

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Across
  1. 4. A salt or ester of nitrite acid
  2. 5. the chemical element of atomic number 15
  3. 10. A river or stream flowing into a larger river or lake
  4. 12. The property of the surface of a liquid that allows it to resist an external force
  5. 15. Water that is safe to drink or to use for food preparation
  6. 16. A measure of how acidic/basic water is
  7. 17. Pressure on the environment caused by human activities
  8. 19. The net result of the overall negative charge of the oxygen atom and the overall positive charges of the two hydrogen atoms
  9. 21. An organism whose status in an ecosystem is analyzed as an indication of the ecosystem's health
  10. 23. The activity or practice of touring
  11. 25. The molecular force of attraction in the area of contact between unlike bodies that acts to hold them together
  12. 26. A system of interlocking and interdependent food chains
  13. 28. A rising of seawater, magma, or other liquid
  14. 29. An opening in the sea floor out of which heated mineral-rich water flows
  15. 31. A measure of the condition of water relative to the requirements of one or more biotic species and or to any human need or purpose
  16. 32. The tidal mouth of a large river, where the tide meets the stream
  17. 34. An area of the ocean floor where hydrogen sulfide, methane and other hydrocarbon-rich fluid seepage occurs
  18. 35. all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds
  19. 36. A series of organisms each dependent on the next for food
  20. 37. The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
  21. 38. A measure of the warmth or coldness of an object or substance
  22. 39. The state or quality of a material or membrane that causes it to allow liquids or gases to pass through it
Down
  1. 1. The degree of compactness of a substance
  2. 2. The regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms
  3. 3. the rigid outer part of the earth
  4. 6. A continuous, directed movement of seawater generated by forces acting upon this mean flow, such as breaking waves, wind, the Coriolis effect, cabbing, temperature and salinity differences
  5. 7. The amount of heat required to convert a liquid into a gas at constant temperature and pressure
  6. 8. A substance that dissolves most chemicals
  7. 9. The amount of heat one gram of a substance must absorb or lose to change its temperature by one degree Celsius
  8. 11. Stress on the environment caused by natural activities
  9. 13. The envelope of gases surrounding the earth
  10. 14. The molecular force between particles within a body or substance that acts to unite them
  11. 18. An irregularly occurring and complex series of climatic changes affecting the equatorial Pacific region and beyond every few years
  12. 20. The cycle of processes by which water circulates between the earth's oceans, atmosphere, and land
  13. 22. The cloudiness or haziness of a fluid caused by large numbers of individual particles
  14. 24. The amount of oxygen that is present in the water
  15. 27. Materials or substances such as minerals, forests, water, and fertile land that occur in nature and can be used for economic gain
  16. 30. basin The portion of land drained by a river and its tributaries
  17. 33. The saltiness or dissolved salt content of a body of water