Unit 4 Terms

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Across
  1. 5. a collection of principles to apply for farm production processes to get better agricultural products.
  2. 8. pesticides that kill or prevent the growth of fungi and their spores.
  3. 9. zone the near shore area where sunlight penetrates all the way to the sediment and allows aquatic plants (macrophytes) to grow.
  4. 11. an agent, usually chemical, for killing or inhibiting the growth of unwanted plants.
  5. 12. water that has infiltrated the ground to fill the spaces between sediments and cracks in rock.
  6. 13. a type of peat-accumulating wetland fed by mineral-rich ground or surface water.
  7. 15. inhabiting or situated in still fresh water.
  8. 18. any animal lacking a backbone and large enough to see without the aid of a microscope.
  9. 20. the process involving loosening and turning of soil in agricultural fields.
  10. 21. waste water from domestic, commercial, and industrial sources carried by sewers.
  11. 22. zone the open water area where light does not generally penetrate all the way to the bottom.
  12. 24. the runoff produced when water encounters exposed rocks containing sulfur-bearing minerals that react with water and air to form sulfuric acid and dissolved iron.
Down
  1. 1. a chemical or biological substance which harms water, air, or land quality.
  2. 2. an area of land that drains or “sheds” water into a specific waterbody.
  3. 3. zone located below the thermocline where the sunlight does not penetrate.
  4. 4. washing by a stream of water or other fluid.
  5. 6. areas where water covers the soil or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season.
  6. 7. any substance used to kill, repel, or control certain forms of plant or animal life that are pests.
  7. 10. zone the lowest ecological zone in a water body, and usually involves the sediments at the seafloor
  8. 14. the inability of a sexually mature adult to reproduce by natural means.
  9. 16. a type of wetland ecosystem where water covers the ground for long periods of time.
  10. 17. inhabiting or situated in rapidly moving fresh water.
  11. 19. system of growing different kinds of crops in recurrent succession on the same land.
  12. 21. an area of land permanently saturated, or filled, with water.
  13. 23. the part of the water cycle in which the water flows over the land as surface water rather than be absorbed into groundwater or evaporating.