GCSE Combined Science (AQA)

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Geothermal Energy

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Energy National and global energy resources

Geothermal Energy

2:36 More Renewable Energy Resources
Spec 4.1.3
Previous Wave Energy Next Pollution
  • Large stores of thermal energy exist in rocks and fluids below Earth's crust.
  • This energy is from Earth's creation and nuclear reactions in the core.
  • Thermal energy is stored as hot molten rocks (magma) and other forms.
  • Thermal energy is close to Earth's surface at certain locations.
  • Found from shallow depths to several miles below Earth's surface, leading to thermal currents.
  • Near-surface thermal currents result in geezers and hot springs.
  • Geothermal energy is thermal energy found below Earth's surface.
  • Geothermal power plants use this energy for heating or electricity generation.
  • Plants should be built near thermal currents, such as hot springs or geezers.
  • Iceland has many suitable locations for geothermal energy generation.
  • Thermal energy is harnessed by drilling into a thermal current.
  • Water is pumped below the surface to be heated by thermal currents.
  • Heated water can be used to heat homes or generate electricity.
  • Advantages of geothermal energy: clean, renewable, no emissions, reliable.
  • Disadvantages: few suitable locations, difficult and dangerous to set up.

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