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==Key Stage 3==
===Meaning===
'''Biofuel''' is an [[Energy Resource|energy resource]] made from [[plant]]s and [[animal]]s that have been grown to heat, light or to power [[Electrical Appliance|electrical appliances]].
===About Biofuel===
: [[Biofuel]] is a [[Renewable Energy Resource|renewable energy resource]].
: [[Biofuel]] has [[energy]] in its [[Chemical Potential Energy Store|chemical potential energy store]] which can be transferred into a [[Thermal Energy Store|thermal energy store]] by [[combustion]].
There are several types of '''biofuel''':
*Wood
*Bio-ethanol
*Bio-diesel
*Bio-gas
===Power===
: 1. [[Biofuel]] is burned in a furnace.
: 2. The combustion of [[biofuel]] heats water in a boiler.
: 3. The water turns into steam and rushes down pipes.
: 4. The steam turns a turbine.
: 5. The turbine spins a generator.
: 6. The generator makes electricity.
====Advantages====
*Extremely reliable.
*When growing fuels Carbon dioxide is taken out of the atmosphere by the plants.
*Can be ‘carbon neutral’ as the same amount of Carbon Dioxide is taken out of the [[Earth's Atmosphere|atmosphere]] to grow the [[biofuel]] as it put back into the [[Earth's Atmosphere|atmosphere]] by burning them.
====Disadvantages====
*Cost of fuels is high.
*Large areas of land must be used to grow the fuel (this can mean cutting down forests for land).
*Burning the fuels produces carbon dioxide and if fuels are burned quicker than they can be grown then the produce more pollution.
==Key Stage 3==
{{#ev:youtube|https://www.youtube.com/watch?v=ek_I0c6mEvI}}
===Meaning===
'''Biofuel''' is an [[Energy Resource|energy resource]] made from [[plant]]s and [[animal]]s that have been grown to heat, light or to power [[Electrical Appliance|electrical appliances]].