energy around us by andrea del hoyo y clara pérez
TRANSCRIPT
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Unit 6: ENERGY AROUND US
ByAndrea del Hoyo
andClara Pérez
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Forms of energy
Energy is the ability an object or body has to create changes around it.There are different types of energy:Mechanical or kinetic energy.Light energy.Sound energy.Electric energy.Thermal or heat energy.Chemical energy.Nuclear energy.
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Electricity
Electricity comes from other forms of energy that exist in nature, like the kinetic energy of moving water or wind, or the chemical energy of coal.
Electricity is a very useful form of energy because we can transport it easily and transform it into other type of energy.
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The most widely used sources of energy
Fuels: when they burn they turn thermal energy into chemical energy.
-Coal.-Natural gas.-Petroleum.
Water: we use the kinetic energy from reservoirs to produce electric energy.
Wind: wind farms turn the kinetic energy of the wind into electricity.
Uranium and plutonium: they are radioactive materials.
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OTHER SOURCES OF ENERGY
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PRODUCING ELECTRICITY
Hydroelectric power stations: they use the energy from reservoirs where water falls with great force.
Thermal power stations: they get energy by burning fuels such as coal or petroleum.The thermal energy created from their combustion heats water is converted into steam. Steam moves a turbine that generates electricity when it turns.
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Hydroelectric power stations
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Thermal power station
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ENERGY PROBLEMS
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THE END