Chapter 9 Vocab

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Across
  1. 3. the gradual increase in Earth's temperature
  2. 9. the rock that makes up Earth's surface
  3. 12. the water and human wastes that wash down drains
  4. 13. any substance that causes pollution
  5. 16. a thick, brownish haze formed when certain gasses in the air react with sunlight
  6. 17. the wastes produced in homes, businesses, schools and the community
  7. 19. any material that is harmful to humans or the environment that is not properly disposed of
  8. 22. airborne pollutants
  9. 24. chemicals that kill crop-destroying organisms
  10. 25. a layer of nutrients, air, rock fragments and water
  11. 26. human made gasses that contain chlorine and fluorine
  12. 31. a period where less rain than normal falls in an area
  13. 32. the process by which water, wind or ice moves particles of rock
  14. 33. the rocky layer below topsoil
Down
  1. 1. energy-rich substances formed from the remains of organisms
  2. 2. gasses that absorb heat leaving Earth's surface
  3. 4. water stored in soil and rock
  4. 5. the process of restoring an area's productivity
  5. 6. the advance of desert-like conditions in areas that were once fertile
  6. 7. the process of reusing old products to make new ones
  7. 8. a polluted liquid created from rainwater and chemicals in a dump
  8. 10. holds municipal waste, construction debris, and other waste
  9. 11. when soil becomes less fertile
  10. 14. nutrients to help crops grow better
  11. 15. warm air prevents smog from rising during this
  12. 18. a radioactive, colorless, odorless gas
  13. 20. the burning of solid waste
  14. 21. the top layer of dead leaves and grass
  15. 23. particles of rock and sand
  16. 27. a layer of the upper atmosphere about 15 to 30 km above the Earth's surface
  17. 28. a form of oxygen found in smog
  18. 29. precipitation that is more acidic than normal
  19. 30. materials that can be broken down by bacteria and other decomposers