Unit 3 Reading and Thinking 课件【知识精讲+备课精研】 高中英语人教版选择性必修第三册

Unit3EnvironmentalProtection—ReadingandThinkingDiscussclimatechange人教版选择性必修三TodiscussclimatechangeTolearntoidentifythestyleofthistextandinferthewriter’spurposeTolearntodrawadiagramTothinkabouthowwecandotodealwithclimatechangeWhat

phenomenacanyouidentifyfromtheseimages?Whatisthecauseofthesephenomena?？LeadinClimateChange

RequirestheWorld’sAttentionWecanseetheglobalsurfacetemperature.Yes,itmaybeaboutenvironment.1Beforeyouread,lookatthegraphandthepicturebelowanddiscussthesequestionsingroups.1Whatisthegraphabout?Whatinformationyou’llgetfromit?2Haveyoueverseenthephotobefore?Whatmightbethestorybehindit?LeadinPreparationHowtodescribeaprocessinaclearerway?Youmayuseadiagramtoshowit!ReadingClimatechangerequirestheworld’sattention1.Readthepassageandmatchthemainideawitheachparagraph.Para.1 A.Weneedtodosomethingtoreducegreenhousegasemissions.Para.2

B.Theriseintemperaturehascausednaturaldisasters.Para.3 C.Earthisgettingwarmerandwarmer.Para.4 D.Adeadpolarbearwasfound，whichalarmedsomeexperts.Para.5 E.WhyisEarthgettingwarmerandwarmer?Reading1.Whathappenedto

thepolarbearinthephoto?WhydidtheWriterwriteaboutit?2.Whyisthe“natural”,greenhouseeffectimportantandnecessary?3.Whataretheconsequencesofhighgreenhousegasemissions?4.Whydidtheauthormentiontheclimatescientists'warning?5.Whatistheauthor’spurposeofwritingthistext?Theyappeartostarveanddie.Hewantsustoprotectourenvironment.Withoutit,theearthcannotsustainlife.ItcanleadtoextremeweatherandnaturaldisastersTopreventusfrompayingahigherprice.Hewantsustoprotectourenvironment2.Readthetextandanswerthequestions.ReadingDeadpolarbear

in

Norway’sArcticislandofSvalbard

Awarmingoceanandatmospherealongwithmeltingiceandrisingsealevels

AgraphshowingrisingglobaltemperatureReadingthe1stand2ndparagraphEvidenceofclimatechange

3

2Evidence

1The________isgettingwarmerandwarmer.Evidenceone:_________________________________Evidencetwo:_________________________________Evidencethree:_________________________________awarmingoceanandatmosphereReadparagraphone,andfillintheblanks.EarthmeltingicerisingsealevelsReadingTime

WhereWhathappenedHowdidithappen2013Norway’sArcticislandofSvalbardApolarbeardiedofstarvation.Paragraph2introducesanexampleoftheincreaseintemperaturethathadanimpactonEarth’secology.Readitandfillintheblanks.Thebearcannothuntfoodbecauseoflowsea-icelevels.ReadingGreenhouseEffectPeopleproducehugeamountsofextragreenhousegasesbyburningfossilfuels.HeatfromthesunenterstheatmosphereandwarmsEarth’ssurfaceasshort-waveradiation.

Readingthe3rdparagraphAkeyclimateprocesscalledthe"greenhouseeffect"

AbigproblemDefinitionman-madekeepingEarth'sclimatewarmandhabitable

FunctionDefinitionnaturalMoreheatenergyistrappedintheatmosphereandcauses

Earth'ssurfacetemperaturetorisequickly.TrapheatfromthesuntokeeptheEarth’ssustainablelife.ReadParagraph3,andfigureoutthereasonwhyearth’stemperaturerising.Green-houseeffect“Natural”greenhouseeffect“man-made”greenhouseeffectByburningfossilfuels,extragreenhousegasescauseEarth’stemperaturetorise.ReadingReadingExamples:Newsreportsarefrequentlybroadcastaboutextremerainstormsandheatwavescausingdeathsandeconomiclosses.

Thiswarmingtrendwillprobablycontinue.anincreaseinextremeweatherandnaturaldisastersworldwide,causingseriousdamageandcostingofhumanlives

3

2Consequences

1the4th

paragraphNegativeeffectsofriseinglobaltemperatureSummarizethemainideaofparagraph4,accordingtothediagram.TemperaturerisingExtremeweather&naturaldisasterSeriousdamage&humanlivesWeshouldtakeappropriateactionsatonce.ReadingReadingIndividuals:reduceour“carbonfootprint”Thegovernment:makingpoliciesandtakingappropriateactionsandmeasuresTheattentionandawarenessofeveryone

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2Solutions

1the5th

paragraphSolutionstotheenvironmentalproblems“Thingssoundprettybad–whatcanwedotostopclimatechange?”suggestionsTurnelectrical

appliancesoffwhennotusingthem.Putonmoreclothes,don’tturnuptheheat.Walkorrideabike,don’tdrive.Recyclecans,bottles,plasticbagsandnewspapers.Buythingsmadefromrecycledmaterials.Buyproductsthatuselessenergy.Planttrees.Talkwithfamilyandfriendsaboutglobalwarming.A:Weshalldosomethingaboutglobalwarming.Discussion:ExerciseDrawadiagramtoshowhowthegreenhouseeffectworksSummary③①②EvidenceanddefinitionNegativeconsequencesPossiblesolutionsClimatechange:greenhouseeffectNatural/Man-madeExtremeweatherNaturaldisastersIndividualsGovernment4.Discussthesequestionsingroups1Whatexamplesofextremeweatheranddisastersdoyouknow?Canyoumakealist?2Doyouthinkclimatechangeistheresultofhumanactivity?Giveyourreasons.3WhodoyouthinkshouldtakeresponsibilityfordealingWithclimatechange?Whatcanwedo?Discussion:1.Writeacom