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Chapter 15: Energy. Section 15.3: Energy Resources. Nonrenewable Energy Resources. These types of resources exist in limited amounts. Cannot be replaced in a reasonable amount of time Examples: Oil (fossil fuel) Natural Gas (fossil fuel) Coal (fossil fuel) Uranium .

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chapter 15 energy

Chapter 15: Energy

Section 15.3:

Energy Resources

nonrenewable energy resources
Nonrenewable Energy Resources
  • These types of resources exist in limited amounts.
    • Cannot be replaced in a reasonable amount of time
  • Examples:
    • Oil (fossil fuel)
    • Natural Gas (fossil fuel)
    • Coal (fossil fuel)
    • Uranium
renewable energy resource
Renewable Energy Resource
  • Resources that can be replaced in a reasonable amount of time
  • Examples:
    • Hydroelectric energy
    • Solar energy
    • Geothermal energy
    • Wind
    • Biomass
    • Nuclear fusion (in the future)
hydroelectric energy
Hydroelectric Energy
  • Energy obtained from flowing water
    • Potential energy from downward flowing water changes to kinetic energy.
    • Kinetic energy can be connected to electric generators
  • Advantages
    • Low cost to produce
    • Causes no pollution
  • Disadvantages
    • Dams cause environmental concerns.
    • Many of the best places for dams in the U.S. are already being used.
solar energy
Solar Energy
  • Sunlight converted into usable energy
  • Benefits depend on climate
    • Does not cause pollution
    • If the climate lends itself to cloudier weather, then solar energy is not as practical.
geothermal energy
Geothermal Energy
  • Thermal energy beneath Earth’s surface
  • Found in some regions ~ especially ones close to volcanoes
  • Advantage: does not cause pollution
  • Biggest disadvantage: not widely available
other renewable resources
Other Renewable Resources
  • Biomass energy: chemical energy stored in living things
  • Can be converted into thermal energy
    • Examples:
      • burning wood
      • using corn stalks to produce fuel for cars
  • Hydrogen fuel cells: generate electricity by reacting hydrogen with oxygen (produces water)
  • Fusion: likely to produce little pollution or radioactive waste
conserving energy resources
Conserving Energy Resources
  • Energy can be conserved by:
    • reducing energy needs
    • increasing the efficiency of energy use
  • Finding ways to do these two things is energy conservation.
  • Making products more energy efficient can be expensive at first (a problem for manufacturers) but saves money and energy over time.