Energy Resources

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Energy Resources
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Renewable Resource

• A natural resource that can be replaced in nature
  almost as quickly as it is used
• Examples water, wind energy, solar energy

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Nonrenewable Resource

• A natural resource that cannot be replaced by
  natural processes as quickly as it is used
• Examples fossil fuels, such as coal, oil, and
  natural gas

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Solar Energy

• Energy from the sun
• Major source of energy for most of Earths
  processes such as photosynthesis

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Photosynthesis

• Occurs in green plants, seaweeds, algae, and
  certain bacteria
• Plants use energy from the sun to convert carbon
  dioxide and water into glucose, a simple sugar
  used as food for energy.
• A byproduct is oxygen which is needed by humans
  and animals
• Ancient products of photosynthesis known as
  fossil fuels supply most of our modern industrial
  energy
• http//encarta.msn.com/encnet/refpages

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Fossil Fuels

• Nonrenewable energy resources, such as coal, oil,
  and natural gas that are formed from the decayed
  remains of ancient plants and animals
• Concentrated forms of the suns energy
• Burned to release their chemical energy

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Coal

• A solid fossil fuel that is found in mines
  underground
• Formed over time by animal and plant remains that
  have been exposed to high temperature and
  pressure
• Burned to produce steam to run generators

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Oil

• A highly flammable liquid formed by decayed
  ancient organisms
• Supplies us with gasoline, kerosene, and wax

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Natural Gas

• Produced when compounds rise to the top of the
  crude oil deposits and are trapped
• Composed mainly of methane, but also contains
  propane, and butane
• Used in heating systems, stoves, ovens, and
  vehicles as an alternative to gasoline
• Cleanest burning fossil fuel

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Resource Pros Cons
Source of table-Science Explorer Physical
Science, by Prentice Hall
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Problem and Possible Solution

• Problem Since fossil fuels cannot be replaced,
  large deposits will eventually be exhausted.
  Because of this and the need to reduce the risk
  of global warming, the worlds energy sources
  will need to shift away from reliance on fossil
  fuels.

• Possible solution Solar energy is one renewable
  resource that can be explored.

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Solar Energy Applications

• Heating homes and other buildings
• Cooking
• Heating water
• Can be converted into electricity

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Sources of Information

• http//encarta.msn.com/encnet/refpages
• Physical Science, by Glencoe/McGraw Hill
• Science Explorer Physical Science, by Prentice
  Hall