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99 terms
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Biofuel
Any fuel which comes from biomass. It includes liquid fuels (bioethanol and biodiesel), various biogases and solid biofuels.
Deep mining
Mining deep beneath the surface using a system of tunnels and shafts.
Fossil fuel
A fuel produced from organic material which was growing millions of years ago. When we use these fuels we are using the sun’s energy from millions of years ago, which has been stored in the fossil fuels.
Geothermal energy
Energy extracted from hot rocks or water beneath the surface.
Geothermal power
Using the heat contained deep in the Earth (which is more concentrated in volcanic areas).
Hydrocarbon
A compound of hydrogen and carbon. Methane (CH4) is the simplest.
Lignite
A dull brown coal which is typically about 60% carbon.
Non-renewable fuel
One that is not being formed as fast as we are using it, e.g. coal, oil and gas. Current reserves of these fuels will eventually run out.
Opencast mining
Mining at the surface by excavating an open pit.
Penstock
The pipe feeding water to a hydroelectricity turbine.
Petroleum (crude oil)
A mixture of hydrocarbons found in the pore spaces of some rocks.
Photovoltaic cell
A system for producing electricity from sunlight (photo = light, voltage = electricity). The cells absorb the sun’s rays using semi-conducting materials, such as silicone. Electrons are knocked loose from their atoms, which allow them to flow through the material to produce electricity.
Pumped storage
A system where the reservoir in a hydroelectric power station acts much like a battery – storing power in the form of water when demands are low, and producing maximum power during peak periods.
Renewable fuel
One that is being formed as fast as (or even faster than) we are using it, e.g. wind power and tidal power. It will not run out.
Thermal power station
A power station where the fuel is burned to produce heat, which turns water into steam. The steam then turns a turbine to generate electricity. It generally refers to those power stations powered by fossil fuels (coal, oil and gas) and nuclear fuel.
Turbine
Any system that converts a flowing fluid into energy.