Chapter Two Vocabulary

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Across
  1. 4. type of precipitation that forms when waste gases from automobiles and power plants combine with moisture in the air
  2. 6. layer that prevents most harmful ultraviolet (UV) radiation from reaching Earth
  3. 7. to appear or happen
  4. 11. type of natural resource that can be replenished by natural processes at least as quickly as it is used
  5. 12. type of natural resource that will not run out, no matter how much of it people use
  6. 13. scientific observation that Earth’s average temperature is increasing
  7. 15. something that has two different components performing essentially the same task
Down
  1. 1. act of meeting human needs in ways that ensure future generations also will be able to meet their needs
  2. 2. part of the environment that supplies a material that is useful or necessary for the survival of living things
  3. 3. type of smog/air pollution that is formed when sunlight reacts with waste gases from the burning of fossil fuels
  4. 5. type of natural resource that is being used up faster than it can be replaced by natural processes
  5. 8. contamination of the environment with substances that are harmful to life
  6. 9. manufacturing new products out of used products
  7. 10. type of energy creating heat from within Earth
  8. 14. mixture of gases that forms a layer around Earth