7I Energy Resources我的能源资源

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1、KS3Physics7IEnergyResources7IEnergyResourcesContentsThenatureofenergyEnergyresourcesFossilfuelsSummaryactivitiesCanyouthinkofexamplesofeachtypeofenergy?Therearemanydifferenttypesofenergy:thermallightsoundelasticgravitationalkineticelectricalchemicalnuclearDifferenttypesofenergyWh

2、ichtypeofenergy?Energycanbechangedfromoneformtoanother.Forexample:Chemicalenergyinfoodisconvertedtothermalenergyandkineticenergybyourbodies.EnergytransferWhatotherenergytransferscanyouthinkof?Gravitationalenergyinaballisconvertedtokineticenergywhenitfallstotheground.burningmatchp

3、ortabletorchmicrophoneradiotelevisioncatapultmobilephonecarchemicaltoheatandlightchemicaltoheatandlightsoundtoelectricalelectricaltosoundandheatelectricaltosoundandlightandheatelastictokineticandheatchemicaltosoundandmicrowaves(EMradiation)andheatchemicaltokineticandsoundandheatI

4、nallthesetransferstheenergyisnotlost,itisconserved.Energycannotbedestroyedorcreated.Whatenergytransfertakesplaceineachdevice?Whatistheenergytransfer?7IEnergyResourcesContentsThenatureofenergyEnergyresourcesFossilfuelsSummaryactivitiesHumansusechemicalenergy(fromfood)toliveandfunc

5、tion.However,inamodernsocietywealsouselargeamountsofenergyfromothersources.Canyouthinkofsomeactivitiesrequiringenergy?Wheredoestheenergyforthesetypeofactivitiescomefrom?travellingandcommunicatingoverlongdistances;controllingourenvironment,e.g.airconditioning/heating;manufacturing

6、andbuildingmanykindsofmaterialsandproducts,e.g.roads,cars,buildings,preparedfood.UsingenergyEnergyresourcescanbedividedintotwotypes:renewable(e.g.hydroelectric);non-renewable(e.g.coal,oil,nuclearandnaturalgas).EnergyresourcesintheUKThereisafiniteamountoffossilfuelsontheEarthandth

7、eywilleventuallyrunout.Oncefossilfuelsareusedtheycannotberegeneratedandusedagain,sotheyarecallednon-renewable.Non-renewableenergyresourcesoilcoalnaturalgasOil,coalandnaturalgasareexamplesoffossilfuels.Theywereformedfrombiologicaldepositsoverthecourseofmillionsofyears.Renewableene

8、rgyresourceswillnotrunoutbecausetheycane