Chapter 6 Vocabulary: Humans in the Biosphere

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Across
  1. 1. Occurs if a pollutant such as DDT, mercury, or a PCB, is picked up by an organism and is not broken down or eliminated form its body.
  2. 4. The number of different species in the biosphere.
  3. 6. The variety of habitats, communities, and ecological processes in the biosphere.
  4. 10. Cannot be replenished within a reasonable about of time.
  5. 12. Loss of forests.
  6. 13. The practice of clearing large areas of land to plant a single highly productive crop.
  7. 14. Can be produced or replaced by a healthy ecosystem.
  8. 16. An increase in the average worldwide temperature.
  9. 17. A harmful material that enters the biosphere.
  10. 18. Compounds combine with water vapor in the air to form nitric and sulfuric acid that falls as precipitation.
Down
  1. 2. The farming of aquatic animals.
  2. 3. The total of all genetically based variation in all the organisms in the biosphere.
  3. 5. When development splits ecosystems into pieces.
  4. 7. All of the different forms of genetic information carried by a particular species or by all organisms.
  5. 8. Using resources to meet our needs without causing long-term environmental harm.
  6. 9. A combination of farming, overgrazing, seasonal drought, and climate that can turn farmland into desert.
  7. 11. The total area of functioning land and water ecosystems.
  8. 15. A gray-brown haze formed by chemical reactions among pollutants released into the air.