高中英语选修八+Unit22+Lesson1+Global+Warming+课件

Unit22EnvironmentalProtectionWarmupandLesson1Unit22EnvironmentalProtectiInthislesson,we’llbeableto

1.understandsomenewwords.2.understandthetextandgetthekeyinformation.3.talkaboutactivitiestoprotecttheenvironmentwiththeexpressionslearnedinthetextobjectivesInthislesson,we’llbeablewarm-up

warm-upEnvironmentalproblems?airpollutionglobalwarmingendangeredanimalswaterpollutionSoilpollutionsandstormforestration

noisepollutiondesertificationEnvironmentalairglobalendangeFindoutthecausesofenvironmentalproblemsGlobalwarmingthegreenhouseeffectendangeredanimalsnaturaldisastersfloodingwaroverfishingforestrationspaceexplorationoverhuntingpovertyUsethewordsabovetofinishoffEx.1,p5Findoutthecausesofenviron1.Earthquakesandvolcaniceruptionsareexamplesof

naturaldisasters

.2.ThegiantpandaandtheBengaltigerare

endangeredspecies.3.Becauseofthegreenhouseeffect

,theearthiswarmedbygasestrappedintheatmosphere..Answers1.Earthquakesandvolcaniceru4.Globalwarming

isanincreaseovertimeoftheaveragetemperatureoftheEarth.5.Overfishingisharmfultotheecologyofthesea.6.ThousandsofpeopleinAfricacontinuetodiebecauseofwarandpoverty

.7.Thewaterlevelrosesohighinseveralplacesthatmanyhomesareatriskfrom

flooding.4.GlobalwarmingisanincrUnit22EnvironmentalProtectionunit1GlobalwarmingUnit22EnvironmentalProtectiWhat’swrong?Theearthissweating!!!----GlobalwarmingAcidrainGreenhouseeffectLead-inWhat’swrong?Pre-readingPredict:(groupwork)Whatisthetextabout?Basedonthetitle“Canwetake

the

heat”andthefollowingpictures.

Pre-readingPredict:(groupwoTrafficJam

TrafficJamFactoryFactoryThetextmaybeabout:1.Vehiclesandfactoriespumpvarietiesofgasesinhugequantities,especiallycarbondioxide,intotheatmosphere,whichcausesthegreenhouseeffectandwillcausesomeotherdisasters.2.Howdowetakeactionstowrestlewiththisproblemandstopthedisastersfromhappening?Thetextmaybeabout:1.VehiclWhile-readingWhile-readingWhatisglobalwarming?GlobalwarmingmeansanaverageincreaseintheEarth’stemperaturewhichleadstoclimatechange.SkimmingWhatisglobalwarming?GlobalReadthetextandmatchtheheadswiththeparagraphs.1.Drawreaders’attentiontothetopicbyaskingquestions.2.Whatshouldhumanbeingsdo.3.Whatisglobalwarming.4.Consequencesofglobalwarming.5.WhatcauseglobalwarmingPara1.Para2.Para3.Para4.Para5.ReadthetextandmatchtheheWordstudyScanthetextforthesefollowingwordsandworkouttheirmeanings.consensus,bounce,agriculture,coincidence,condemn,reservation,sarifice,advocateScanningWordstudyScanthetextforth1.Inthelastfewdecades,scientistshavereachedconsensusandreportedthathumanbeingsarecausingchangesintheearth’sclimate2.Withoutthesenaturallyoccuringgases,thesun’srayswouldbouncebackintospaceleavingtheEarthcoldandimpossilbetoliveon.agreementjumpback1.Inthelastfewdecades,sc3.Giventhisdata,itseemsthatthelinkbetweenhumanactivitiesandrisingglobaltemperaturesisnotmerelyacoincidence.4.ifwecontinuetoproducecarbondioxideandothergasesinsuchhugequantities,wearecondemninglifeonEarth巧合destroying3.Giventhisdata,itseemst5.Somegovernment,forexample,theUSA’sfederalgovernment,expressreservationsaboutwhetherglobalwarmingisreallycausedbyhumanactivities.6.Expertsadvocatedthateachpersonplaytheirparttosavetheearth.保留意见putforwardandsupport5.Somegovernment,forexamplMatchtheKeyWordswiththeirChinesemeanings.consensusbounceagriculturecoincidencecondemnreservationsacrificeadvocate反弹农业巧合一致的意见保留宣判死刑主张，提倡牺牲MatchtheKeyWordswiththeirCarefulreading(1)Para.1Introduction:Humanbeingsarecausing____anditisbelievedthat________couldbeoneofthebiggest______inthe21stcentry.Para.2Definition:Gloablewarmingrefersto_____intheEarth’stemperraturethat,inturn,______climatechange.Para.3Causes:Manyexpertsinsistthattheblameforthisglobalwarmingcanmostly____.Para.4Consequences:Ifwecontinuetoproducegreenhousegases______.Therewillbemore______suchasfloodings,heatwavesanddroughts.Para.5Action:Allgovernmentshavearesponsibilityto____andeachpersonshould_____.Carefulreading(1)Para.1IntrodPara.1Introduction:Humanbeingsarecausing__________________________anditisbelievedthat________________couldbeoneofthebiggest_____________________________inthe21stcentry.Para.2Definition:Gloablewarmingrefersto________________________intheEarth’stemperraturethat,inturn,___________climatechange.changesintheEarth’sclimateglobalwarmingenvironmentalproblemsanaverageincreaseleadtoPara.1Introduction:HumanbeinPara.3Causes:Manyexpertsinsistthattheblameforthisglobalwarmingcanmostly_________________________.Para.4Consequences:Ifwecontinuetoproducegreenhousegases____________________.Therewillbemore___________suchasfloodings,heatwavesanddroughts.Para.5Action:Allgovernmentshavearesponsibilityto_________________________________andeachpersonshould________________.bepinnedonhumanactivitiesinsuchhugequantitiesdisastersreducetheamountofcarbondioxideplaytheirpartPara.3Causes:ManyexpertsinsiReadthetextandanswerthefollowingquestions.1.WhatiscontrollingthetemperatureoftheEarth?2.AregreenhousegasesnecessaryforlifeonEarth?3.Whathumanactivitiesarecausingglobalwarming?4.Byhowmuchhastheglobalaveragetemperatureincreasedinthelast100years?5.Howcanwehelpsolvetheproblemofglobalwarming?Carefulreading(2)ReadthetextandanswerthefFillintheblanksaboutthetext.GlobalwarmingmeansanaverageincreaseintheEarth’stemperaturewhichcausesclimatechangeinturn.Scientiststhinkitis____________thatcauseglobalwarming,especiallygasesfrom________andvehicleswhichspeedupglobalwarming.factorieshumanbeingsFillintheblanksaboutthetTheyalsothinkglobalwarmingisoneofthebiggestenvironmentalproblemsinthe21stcentury.TheEarth’stemperatureiscontrolledby_______________likecarbondioxidewhich___heatfromthesunintheEarth’satmosphere.Manyexpertsbelieveglobalwarmingismainlycausedgreenhouse

gases

trapTheyalsothinkglobalwarmingbyhuman________.Overthelast100years,theglobalaveragetemperaturehasincreased_______andifhumanbeingscontinuetopump__________gasesintotheEarth’satmosphere,theglobalwarmingwillcausedramaticclimatechangeslikemorefrequentfloods,_________and

by1°F

greenhouseheatwaves

activitiesbyhuman________.OverthelaDroughts.Therearesomeseriousdiseases.Sealevelwillbe______,floatingcoastalarea,negativelyaffecting______andforestry.Sogovernmentsallovertheworldshouldreducethe______ofgreenhousegases.

Weindividualsshouldpay________towhatwearedoing,evenraisedfishingreleaseattentionDroughts.Therearesomeseriosmallchangeslike______publictransport,________,usinglow-flow____________,buyingenergy-efficient___________usingrecycledpaperor___________lightscanhave__________onthefutureoftheEarth.taking

recyclingshowerheads

lightbulbsswitchingoff

greateffect

smallchangeslike______publPostreadingVoiceyouropinions:PostreadingVoiceyouropinionTakingactiononglobalwarming(orclimatechange)issimilar.Insomecases,itonlytakesalittlechangeinlifestyleandbehaviortomakesomebigchangesingreenhousegases

reductions.Forothertypesofactions,thechangesaremoresignificant.Whenthatactionismultipliedbythe1.3billionpeopleinChina.Orthe6billionpeopleworldwide,thesavingsaresignificant.

Whatdifferencecanwemake?GroupworkTakingactiononglotakepublictransportlikebusesExamples

takepublictransportlikeTherecyclingsymbol

buytherecycledproductsRecycledproductsTherecyclingsymbolbuytheruselow-flowshowerheadsbuyenergy-efficientlightbulbsreplacewithuselow-flowshowerheadsbuyeLanguagepointsLanguagepointsHerearesomekeyphrasesfromthetext:beyondourcontrolpumpintospeeduprefertotrap…into…bouncebackasaresultofleadtoberelevanttoinsuchhugequantitieshavearesponsibilitytointurnasindividualsswitchofftakeaction

outofourcontrolpipeintoacceleratemeansputinthetrapsendb