Chapter 9 Vocab - Science 8

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Across
  1. 4. a layer of ozone molecules in the upper atmosphere
  2. 5. the bottom layer of soil made up of the rock of Earth's crust
  3. 6. nutrients applied to soil that help crops grow better
  4. 8. the process of reclaiming raw materials and reusing them to make new products
  5. 10. a polluted liquid that forms when rainwater falls over waste in a landfill
  6. 12. a thick, brownish haze that forms over a city when certain gases from emissions react with sunlight
  7. 14. any material that can be harmful to human health or the environment if not disposed of properly
  8. 16. any substance that causes pollution
  9. 17. a period when less rainfall than normal falls in an area
  10. 18. water stored in soil and rock beneath Earth's surface
  11. 20. a mixture of rock fragments, nutrients, water, air, and decaying plant and animal matter
  12. 22. the layer of soil that contains rock fragments, water, and air, but has much less nutrients as the layer above it
  13. 24. materials that can be broken down and recycled by bacteria and other decomposers
  14. 26. the wastes produced in homes, businesses, schools, and in the community
  15. 27. a unique weather condition where a layer of warm air prevents pollutants from rising
  16. 28. a form of oxygen with 3 atoms
  17. 30. precipitation that is more acidic than normal
  18. 31. pollutants that are released into the air
  19. 32. the gradual increase in the temperature of Earth's atmosphere
  20. 33. the water and human wastes that are washed down sinks, showers, and toilets
Down
  1. 1. a colorless, odorless gas that is radioactive
  2. 2. energy-rich substances formed from the remains of organisms
  3. 3. chemicals that kill crop destroying organisms
  4. 7. a specially designed landfill built to hold municipal solid waste more safely
  5. 9. human-made gases that damage the ozone layer
  6. 11. the process by which water, wind, or ice moves particles of rocks or soil
  7. 13. the process of soil becoming less fertile
  8. 15. the process of restoring an area of land to a more productive state
  9. 19. the advance of desert like conditions into a previously fertile area
  10. 21. the top layer of soil that consists of dead leaves and grass
  11. 23. particles of rock and sand in bodies of water
  12. 25. gases that trap heat in the Earth's atmosphere
  13. 29. the burning of municipal solid waste