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Energy

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Transcript

  • 1. Energy Without energy nothing happens.
  • 2. Energy Does Work!
    • Work is done when objects are moved or heated.
    • Energy is never ‘used up’ it is simply converted from one form to another. Can you think of some sources of energy?
    • Fuels and food are sources of energy.
    • Can you think of any examples when energy is converted from one form to another?
  • 3. Converted Energy Fuels for generating electricity.
    • There are 3 main classes of fuel which can be used to generate electricity:
    • Fossil fuels, renewable fuels and nuclear fuels.
    • What are fossil fuels?
    • What are renewable fuels?
    • How are these fuels used to generate electricity?
  • 4. Energy is released from the fuel.
    • Fossil fuels such as gas, coal and oil and renewable fuels such as wood, are burnt and heat is generated.
    • This heat is used to boil water and the steam that is created is used to turn large propellers called turbines.
    • These turbines then turn electrical generators.
  • 5. ENERGY
    • In addition to these fuels there are other energy sources used to generate electricity.
    • Can you think of any?
  • 6. Other Energy Sources
    • Solar power: converts the energy of the sun into electricity.
    • Wind power: Moving air can be used to turn propellers.
    • Hydroelectric power: using water. The higher the drop and the greater the drop, the more energy can be created.
    • Wave power: wind causes waves to form on the water and the motion of these waves can be used to turn generators.
  • 7. What have we learned?
    • Energy does work.
    • Energy is never ‘used up’ it is simply converted from one form to another.
    • Fuels and food are sources of energy.
    • There are 3 main classes of fuel which can be used to generate electricity: Fossil fuels, renewable fuels and nuclear fuels.
    • Fossil fuels such as gas, coal and oil and renewable fuels such as wood are burned and heat is generated.
    • This heat is used to boil water and the steam that is created is used to turn large propellers called turbines.
    • These turbines then turn electrical generators.
    • There are other sources of energy such as: Solar power, wind power, hydroelectric power and wave power.
  • 8. These photographs show ways of getting energy from four different energy sources. Can you name them?

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