APES CHOICE BOARD

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Across
  1. 1. removal of dissolved materials from soil by water moving downwards
  2. 3. (Formation: secondary pollutant, NO2+UV=NO+O O+O2=O3, with VOCs)
  3. 4. rapid algal growth caused by an excess of N & P
  4. 7. symbiotic relationship where both partners benefit
  5. 10. caused by sulfuric and nitric acids resulting in lowered pH of surface waters
  6. 11. large distinct terrestrial region having similar climate, soil, plants & animals
  7. 12. deposit of leached material in lower soil layers
  8. 14. rock that contains a large enough concentration of a mineral making it profitable to mine
Down
  1. 2. decomposers covert organic waste into ammonia
  2. 5. allows the use of resources in a responsible manner
  3. 6. formed by chemical reactions involving sunlight (NO, VOC,O)
  4. 8. perfect agricultural soil with equal portions of sand, silt, clay
  5. 9. rule of 70 70 divided by the percent growth rate
  6. 13. setting aside areas & protecting them from human activities