Edexcel IGCSE Physics 复习笔记 4.2.6 Energy Resources

• Energy resources are large stores of energy that can be transferred from one form into electrical energy that can be used by society

• Generating energy reliably requires the use of a range of different energy resources, as listed in the table below:

Energy Resources Table

• A renewable energy resource is defined as

An energy source that is replenished at a faster rate than the rate at which it is being used

• As a result of this, renewable energy resources cannot run out
• Renewable resources include:
  • Solar energy
  • Wind
  • Bio-fuel
  • Hydroelectricity
  • Geothermal
  • Tidal

   

• Fossil fuels: chemical energy → thermal energy → kinetic energy → electrical energy

• Solar energy: nuclear energy → light & thermal energy → electrical energy

• Nuclear: nuclear energy → thermal energy → kinetic energy → electrical energy

• Wind: kinetic energy → electrical energy

• Bio-fuel: chemical energy → thermal energy → electrical energy

• Hydroelectricity: gravitational potential energy → kinetic energy → electrical energy

• Geothermal: thermal energy → kinetic energy → electrical energy

• Tidal: kinetic energy → electrical energy

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