APES Crossword Chapter 16-20

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Across
  1. 2. converts organic materials into a nutrient-rich soil
  2. 3. long-term heating of Earth's surfaces
  3. 4. layer of the earth's atmosphere above the troposphere
  4. 8. (CO2, CH4, CFC, NOx, O3, H2O) are examples of...
  5. 11. study of the relationships among living organisms and their physical environment
  6. 14. destruction of waste materials by burning
  7. 15. recovery and reprocessing of waste materials for use in new products
  8. 17. concentration of toxins in an organism
  9. 20. emitted from rice paddy
  10. 23. waste with properties that make it dangerous
  11. 24. part of the ocean that is close to shore and consist of plants
  12. 25. buildup of chemicals in an organism, usually affects organisms high up the food chain
Down
  1. 1. colorless, highly toxic, and flammable gas at room temperature
  2. 5. species in danger of extinction
  3. 6. controlled amounts of water to land to help crops grow
  4. 7. symptoms appear suddenly and lasts for a short amount of time
  5. 9. surface mining at the summit of a mountain
  6. 10. movement of saltwater into bodies of freshwater
  7. 12. ecologic material from which soil horizons form
  8. 13. fertile land becomes desert
  9. 16. removes contaminates from water when pressure forces it through a semipermeable membrane
  10. 18. heat energy from the earth
  11. 19. harnessed light and heat that come from the sun converted to energy
  12. 21. amount of material that kills 50 percent of a test sample
  13. 22. measure of relative clarity of a liquid