Crossword Puzzle

Natural Resources

Across

  1. power generated by falling water (hydroelectricpower)
  2. increase in average temperatures of earth and the atmosphere due in part to increases carbon dioxide levels (globalwarming)
  3. impossible to use up (inexhaustible)

Down

  1. resource that takes millions of years to form (nonrenewable)
  2. resource that can be replenished over relatively short time spans (renewable)
  3. hydrocarbon that may be used as a fuel (fossilfuel)
  4. energy that can be extracted from earths internal heat (geothermal)
  5. water that flows over land surface (runoff)
  6. careful use of resources (conservation)
  7. Collecting and processing of used items so they can be made into new products (recycling)
  8. plant or animal waste converted to usable energy source (biomass)

["compost", "greenhouseeffect", "naturalgas", "nuclearenergy"]

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