z10c.bc
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Mind Map on P3 Science Revision Notes!, created by z10c.bc on 25/04/2014.

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z10c.bc
Created by z10c.bc about 11 years ago
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P3 Science Revision Notes!

P3 Science Revision Notes!Primary energysourcesFossil fuelsnuclear fuelsbiofuelsWindWavesRadiation from thesunSecondary energy sources are produced fromprimary energy sources. Electricity is a secondaryenergy source because it is generated from primaryenergy sourcesPower is measured in Watts(W)Time is measure is Seconds (s)Energy is measured in Joules (J)Electricity is powered in Volts (V)Current is measured in Amps (A)Power (W) = Volts (V) x Current (A)A sankey diagramn shows how energysupplied to a device is transferred intodifferent forms of energy90J is lost10J is used100J is inputEfficiency = energy usefully transferred ÷ total energy supplied1.fuel is burned to boil water to makesteam 2.steam makes a turbine spin3.spinning turbine turns a generatorwhich produces electricity 4.electricitygoes to the transformers to producethe correct voltage.Waste from power stationsare radioactive. They pose aserious health riskRenewable energy sourcesWind TurbinesHydroelectric SchemesWave TechnologyRely on the weatherRely on the weatherNeed suitable sitesDouble click this nodeto edit the textClick and drag this buttonto create a new node