Unit6EarthFirstDevelopingIdeasP6871课件高中英语

Unit6EarthFirst新外研必修Book2DevelopingIdeasP68-70

LearningobjectivesInthisclass,youwillreadandfindoutifthefour“greentruths”aretrueorfalse;readandfindoutthedetailsaboutthe“greentruths”;thinkandsharewhatyoucandotobecome“greener”;summarizehowtowriteapersuasiveletterbyreadingsamplepassage;writeyourownpersuasiveletter.ReadingWritingLead-inWatchandthink.Doyousupport"greenliving"?Whatshouldwedotoprotectenvironmentinourdailylife?1.Whichshoppingbagismoreenvironmentallyfriendly?

Aplasticbag.

Apaperbag.

Neitherofthese.Lookatthequestionsabout"greenliving"andtickyouranswers.Pre-reading2.Whatshouldyoudotosaveenergywhenleavingyourhome?

Turnoffadevice.

Unplugadevice.

Neitherofthese.Lookatthequestionsabout"greenliving"andtickyouranswers.Pre-reading3.Whatfoodisbetterfortheenvironment?

Foodproducedneartowhereyoulive.

Foodproducedfarfromwhereyoulive.

Itdepends.Lookatthequestionsabout"greenliving"andtickyouranswers.Pre-reading4.Whichuseslesswater?

Takingabath.

Takingashower.

Itdepends.Lookatthequestionsabout"greenliving"andtickyouranswers.Pre-readingReadthefoursubheadingsinthepassageanddecideiftheyaretrueorfalse.LearningtolearnAssubheadingsexpandonthemainheadingortitle,theycanbeslightlylongerthanthemainheading.Althoughnoteveryparagraphneedsasubheading,theycanbeskimmedtogivethereaderanoverallunderstandingofthecontentofatext.While-reading?Papershoppingbagsarebetterthanplasticones.?Whenyouturnoffadevice,itstopsusingpower.?Eatinglocalfoodisgoodfortheenvironment.?It’sbettertotakeashowerthanabath.Readthefoursubheadingsinthepassageanddecideiftheyaretrueorfalse.While-readingNowreadthepassage

toknowmore.

While-reading?Papershoppingbagsarebetterthanplasticones.?Whenyouturnoffadevice,itstopsusingpower.?Eatinglocalfoodisgoodfortheenvironment.?It’sbettertotakeashowerthanabath.Checkyouranswer.Readandcheck?Papershoppingbagsarebetterthanplasticones.Let’sfigureouthowthesestatementsgowrong.Makingapaperbagusesfourtimesasmuchenergyasmakingaplasticbaganduptothreetimestheamountofwater.Theprocessalsoproducesmoregreenhousegases.Infact,bothkindsofbagsarebadfortheenvironment.So,takeareusablebagwithyouwhenyougoshopping.GreenadviceReadandcheck?Whenyouturnoffadevice,itstopsusingpower.Let’sfigureouthowthesestatementsgowrong.Whenweturnoffadevice,suchastelevision,itgoesintostand-bymode.Devicesinthismodestillusepower,andolderdevicesinstand-bymodecanuseevenmore.Tomakesureyourapplianceisinfactoff,removetheplugfromitspowersupply.GreenadviceReadandcheck?Eatinglocalfoodisgoodfortheenvironment.Let’sfigureouthowthesestatementsgowrong.Insomecases,localproducemighthaveusedmoreenergyandproducedmoregreenhousegasesthanproducegrownalongwayaway—eventakingintoaccountitstransport.Apartfromthetransport,weshouldtaketheproductionoffoodintoaccount.GreenadviceReadandcheck?It’sbettertotakeashowerthanabath.Let’sfigureouthowthesestatementsgowrong.Itdependsonhowlongyouspendintheshowerandhowlargeyourbathis.Ifyouspendmorethaneightminutesinashower,you’lluseasmuchwaterasinabath—about50litresofwater.Thekeyistokeepyourshowertimeasshortaspossible.GreenadviceReadandcheckReadforstructureMostofusareawarethatwemusttakecareoftheenvironment,andthemajorityofustakestepstosaveenergyandreducewasteandpollution.Butrecently,some“greentruths”havebeenshowntobeonlyhalftrue,orevencompletelyfalse.Herearesomecommonones.Whicharereallygreen?Papershoppingbagsarebetterthanplasticones.Plasticbagscauselitterandareadangertowildanimals,whichmistakethemforfood.Ittakeshundredsofyearsforplastictobreakdown,butmuchlesstimeforpaper.Becauseofthis,peoplethinkpaperbagsarethebetterenvironmentalchoice.However,makingapaperbagusesfourtimesasmuchenergyasmakingaplasticbaganduptothreetimestheamountofwater.Theprocessalsoproducesmoregreenhousegases.Infact,bothkindsofbagsarebadfortheenvironment.So,takeareusablebagwithyouwhenyougoshopping.Whenyouturnoffadevice,itstopsusingpower.Whenweturnoffadevice,suchastelevision,itgoesintostand-bymode.Devicesinthismodestillusepower,andolderdevicesinstand-bymodecanuseevenmore.Thishappensbecauseelectricitycontinuestoleakfromthedevice,evenwhenitisturned“off”.Tomakesureyourapplianceisinfactoff,removetheplugfromitspowersupply.Eatinglocalfoodisgoodfortheenvironment.Itseemslikecommonsense:eatinglocalfoodshouldbebetterfortheenvironment,becauseitdoesnotneedtobetransportedlongdistancesandkeptcoldduringtransport.Unfortunately,itisnotthatsimple.Itistheproductionoffood,notitstransport,thatusesmostoftheenergyandproducesmostofthegreenhousegases.Insomecases,localproducemighthaveusedmoreenergyandproducedmoregreenhousegasesthanproducegrownalongwayaway-eventakingintoaccountitstransport.

It’sbettertotakeashowerthanabath.Itdependsonhowlongyouspendintheshowerandhowlargeyourbathis.Ifyouspendmorethaneightminutesinashower,you’lluseasmuchwaterasinabath-about50litresofwater.Therefore,thekeyistokeepyourshowertimeasshortaspossible.Environmentalawarenessisnowpartofdailylife.Butit’sworthcheckingcommonideasandopinionstoseewhat’sreallygreen.IntroductionConclusionBodyGreentruth1Greentruth2Greentruth3Greentruth4ReadfordetailsPapershoppingbagsarebetterthanplasticones.Plasticbagscauselitterandareadangertowildanimals,whichmistakethemforfood.Ittakeshundredsofyearsforplastictobreakdown,butmuchlesstimeforpaper.Becauseofthis,peoplethinkpaperbagsarethebetterenvironmentalchoice.However,makingapaperbagusesfourtimesasmuchenergyasmakingaplasticbaganduptothreetimestheamountofwater.Theprocessalsoproducesmoregreenhousegases.Infact,bothkindsofbagsarebadfortheenvironment.So,takeareusablebagwithyouwhenyougoshopping.Whydomostofpeoplethinkpaperbagsarethebetterenvironmentalchoice?ReadfordetailsWhenyouturnoffadevice,itstopsusingpower.Whenweturnoffadevice,suchastelevision,itgoesintostand-bymode.Devicesinthismodestillusepower,andolderdevicesinstand-bymodecanuseevenmore.Thishappensbecauseelectricitycontinuestoleakfromthedevice,evenwhenitisturned“off”.Tomakesureyourapplianceisinfactoff,removetheplugfromitspowersupply.Whydoesadevicecontinuesusingpowerwhenitisturnedoff?ReadfordetailsEatinglocalfoodisgoodfortheenvironment.Itseemslikecommonsense:eatinglocalfoodshouldbebetterfortheenvironment,becauseitdoesnotneedtobetransportedlongdistancesandkeptcoldduringtransport.Unfortunately,itisnotthatsimple.Itistheproductionoffood,notitstransport,thatusesmostoftheenergyandproducesmostofthegreenhousegases.Insomecases,localproducemighthaveusedmoreenergyandproducedmoregreenhousegasesthanproducegrownalongwayaway-eventakingintoaccountitstransport.Whydopeoplethinkeatinglocalfoodshouldbebetterfortheenvironment?ReadfordetailsIt’sbettertotakeashowerthanabath.Itdependsonhowlongyouspendintheshowerandhowlargeyourbathis.Ifyouspendmorethaneightminutesinashower,you’lluseasmuchwaterasinabath-about50litresofwater.Therefore,thekeyistokeepyourshowertimeasshortaspossible.Whichisbetter,takingashowerortakingabath?Readandcompletethecausesoftheseeffects.Readfordetails1.Makingapaperbagusesmoreenergyandwaterthanmakingaplasticbag.Italsoproducesmoregreenhousegases.Paperbagsarenotgoodfortheenvironment.CAUSESEFFECTSReadandcompletethecausesoftheseeffects.ReadfordetailsTurningoffadevicewon’tstopitfromusingpower.CAUSESEFFECTS2.Devicesturnedoffgointostand-bymodeandstillusepower.Readandcompletethecausesoftheseeffects.ReadfordetailsEatinglocalfoodisn'talwaysbetterfortheenvironment.CAUSESEFFECTS3.Localproducemightusemoreenergyandproducemoregreenhousegases.

Readandcompletethecausesoftheseeffects.ReadfordetailsIt'snotalwaysbettertotakeashowerthanabath.CAUSESEFFECTS4.Ifyouspendmorethaneightminutesinashower,you'lluseasmuchwaterasinabath-about50litresofwater.Mostofusareawarethatwemusttakecareoftheenvironment,andthemajorityofustakestepstosaveenergyandreducewasteandpollution.Butrecently,some“greentruths”havebeenshowntobeonlyhalftrue,orevencompletelyfalse.Herearesomecommonones.Whicharereallygreen?Papershoppingbagsarebetterthanplasticones.Plasticbagscauselitterandareadangertowildanimals,whichmistakethemforfood.Ittakeshundredsofyearsforplastictobreakdown,butmuchlesstimeforpaper.Becauseofthis,peoplethinkpaperbagsarethebetterenvironmentalchoice.However,makingapaperbagusesfourtimesasmuchenergyasmakingaplasticbaganduptothreetimestheamountofwater.Theprocessalsoproducesmoregreenhousegases.Infact,bothkindsofbagsarebadfortheenvironment.So,takeareusablebagwithyouwhenyougoshopping.Whenyouturnoffadevice,itstopsusingpower.Whenweturnoffadevice,suchastelevision,itgoesintostand-bymode.Devicesinthismodestillusepower,andolderdevicesinstand-bymodecanuseevenmore.Thishappensbecauseelectricitycontinuestoleakfromthedevice,evenwhenitisturned“off”.Tomakesureyourapplianceisinfactoff,removetheplugfromitspowersupply.Eatinglocalfoodisgoodfortheenvironment.Itseemslikecommonsense:eatinglocalfoodshouldbebetterfortheenvironment,becauseitdoesnotneedtobetransportedlongdistancesandkeptcoldduringtransport.Unfortunately,itisnotthatsimple.Itistheproductionoffood,notitstransport,thatusesmostoftheenergyandproducesmostofthegreenhousegases.Insomecases,localproducemighthaveusedmoreenergyandproducedmoregreenhousegasesthanproducegrownalongwayaway-eventakingintoaccountitstransport.

It’sbettertotakeashowerthanabath.Itdependsonhowlongyouspendintheshowerandhowlargeyourbathis.Ifyouspendmorethaneightminutesinashower,you’lluseasmuchwaterasinabath-about50litresofwater.Therefore,thekeyistokeepyourshowertimeasshortaspossible.Environmentalawarenessisnowpartofdailylife.Butit’sworthcheckingcommonideasandopinionstoseewhat’sreallygreen.Findwordsandexpressionsthatcanconnectthecausesandeffects.1.Whichofthe"greentruths"surprisesyoumost?Giveyourreasons.2.How"green"areyou?Shareyour"greenactions"withtheclass.Post-reading3.Areyouawareofanyother"greentruths"thatarenotture?Sharethemwiththeclass.4.Whatcanyoudotobecome"greener"?Post-readingTheorganicfoodsometimesisnotasgreenaswesuppose;Thecarusingelectricityinsteadofpetrolisnotenergy-saving…TurnoffthelightsandremovetheplugsofelectricdeviceswhenIgooutordon’tusethem;Givetheoldclothestootherstoreusethem;Takeaclothbagorshoppingbasketinsteadofplasticbagswhenshopping…Workingroups.Giveatalkaboutoneofthe"greentruths"inthepassage.

1.

Planyourtalk.

Which"greentruth"areyougoingtotalkabout?

Whydopeoplebelieveitis"green"?

Whyisitnotcompletelytrue?

Whatcanyoudotobecome"greener"?Post-reading

Startyourtalkbystatingthetopic.

Describeyourchosen"greentruth"inmoredetail.

Explainwhyitisnotcompletely"green".

Endyourtalkbyencouragingyouraudiencetobecome"greener".2.

Organiseyourtalk.

3.Giveyourtalktotheclass.

TodayIwouldliketotalkaboutifpapershoppingbagsarebetterthanplasticbags.

Aseveryoneknows,plasticbagscauselitterandareadangertowildanimals.Ittakeshundredsofyearsforplasticbagstobreakdown.Therefore,plasticbagsarebadfortheenvironment.Becauseofthis,somepeoplethinkpaperbagsarebetterthanplasticones.Butthatisnottrue.

Makingpaperbagsusesmuchmoreenergyandwater.Italsoproducesmoregreenhousegases.Sowecometotheconclusionthatpaperbagsarenotenvironmentallyfriendly,either.

Sincebothoftheabovearenotgoodfortheenvironment,what'sreallygreen?Isuggesttakingareusablebagwithyouwhenshopping.Itisreallygreen.Startingfromthesmallthingsaroundus,everyonecanbecomeareal"greener".WritingsampleLanguagePointsP68-69

Unit6EarthFirst新外研必修Book2课文回顾：

句意：我们大部分都意识到要保护环境，也采取了各种行动节约能源，减少浪费和污染。Mostofusareawarethatwemusttakecareoftheenvironment,andthemajorityofustakestepstosaveenergyandreducewasteandpollution.majorityn.多数，大多数（人或物）the majorityof+集体名词，谓语动词用单数或复数。amajorityof+复数名词，表示“许多”，谓语动词用复数。例1：这个国家的大部分人口都住在城市里。The majority of the population in the country________ in cities.lives/live1例2：现在多数工人每周工作5天。A majority of workers now ____ five days a week.worktakestepsto采取措施,采取行动例：至于贸易，我们将采取措施，进一步扩大进口。Asfortrade,wewill______________importmore.takestepsto句意：我们大部分都意识到要保护环境，也采取了各种行动节约能源，减少浪费和污染。Mostofusareawarethatwemusttakecareoftheenvironment,andthemajorityofustakestepstosaveenergyandreducewasteandpollution.1句意：塑料袋会变成垃圾，被野生动物误食后会对其造成伤害。塑料需要数百年才能分解，而纸的降解时间要短得多。mistake...for把…错认为Plasticbagscauselitterandareadangertowildanimals,whichmistakethemforfood.Ittakeshundredsofyearsforplastictobreakdown,butmuchlesstimeforpaper.例：新来的人把你的讽刺误解为怨恨。Newarrivals______yoursarcasm___bitterness.mistakefor2breakdown分解；拆分；失控痛哭例：Becausehewasbeingsokindandconsiderate,Ibroke

downandcried.翻译：______________________________________________

_________________________。因为他是如此的善良和体贴，我忍不住哭了。句意：塑料袋会变成垃圾，被野生动物误食后会对其造成伤害。塑料需要数百年才能分解，而纸的降解时间要短得多。Plasticbagscauselitterandareadangertowildanimals,whichmistakethemforfood.Ittakeshundredsofyearsforplastictobreakdown,butmuchlesstimeforpaper.2句意：在有些情况下，即使将运输的因素考虑在内，本地的农产品也可能比距离遥远的外地种植的农产品耗能更多，产生的温室气体也更多。

Insomecases,localproducemighthaveusedmore

energyandproducedmoregreenhousegasesthanproducegrownalongwayaway-eventakingintoaccountitstransport.例：考虑一下别人的意见，将它们与你自己的意见结合起来。________________theviewsofotherpeopleandcombinethemwithyours.Takeintoaccounttakeintoaccount考虑；重视3WritingP71

Unit6EarthFirst新外研必修Book2What’sapersuasiveletter?Apersuasiveletterisatypeofopinionwritinginwhichyoutrytoinfluenceorchangeyourreaders’thoughts,actio