Humans and the Environment Review

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Across
  1. 1. the main ingredient in air pollution that causes climate change
  2. 2. the main ingredient in natural gas
  3. 4. turns DC to AC in a solar panel
  4. 5. fossil fuels include coal, oil and ____.
  5. 6. the issue with the majority of renewable energies are that they can be ___ to build.
  6. 7. energy using steam created from the pockets of hot water under the ground
  7. 9. the piece that turns mechanical energy into electrical energy
  8. 10. energy that is made from the burning of organic material
  9. 12. energy that gets replaced as often as it is used
  10. 15. in 2050 the main source of the US energy will come from ___.
  11. 17. the energy source that uses the rise and fall of ocean water to turn an underwater turbine
  12. 20. the structure built across a river or lake to harness the energy of water
  13. 21. coal was made from organisms millions of years ago that lived in a ___.
  14. 23. the energy obtained by heating or burning a substance
  15. 24. this will lower if resources are not available for the population to live on
Down
  1. 1. modern day dams are not built of clay, most are built of ___.
  2. 3. energy that cannot be replaced during your lifetime
  3. 8. made from organisms millions of years ago
  4. 11. the mineral used in nuclear energy
  5. 13. the agency that made the clean air and the clean water act.
  6. 14. the kind of cell found in a solar panel
  7. 16. made from organisms millions of years ago that died on the seabed
  8. 18. nuclear energy make radioactive ____.
  9. 19. a substance that contaminates the environment
  10. 22. the result of sunlight mixing with exhaust
  11. 23. that part that spins to harness wind energy