Unit3EnvironmentalProtectionReadingandThinking課件-高中英語人教版選擇性

Part1:ReadingandThinkingDiscussClimatechangeUnit3ENVIRONMENTALPROTECTION010203Byreading,explaincausesandnegativeeffectsofglobalwarming.Byteamwork,presenthowtosolvetheproblemofglobalwarmingingroups.Beawareoftheimportanceofcuttinggreenhousegasesandtakeeffectiveactiontodoit.Bytheendoftheclass,youwillbeabletoLearningAimsWhatdoyouknowaboutglobalwarmingTheeffectsaredestructiveasfollows:Thesealeveltorise.Severestorms,droughts,famines,thespreadofdiseases,anddestructionofspecies.Wideanimalsdiedbecauseofstarvation.Forestfireoccursfrequentlybecauseoftheextremehotweather.LeadinWhatisthegraphaboutWhatinformationcanyougetfromitThegraphisaboutthechangeofglobalSurfacetemperature.Itshowsusthattheglobaltemperatureisrisingsteadilyandcontinuously.2.WhathappenedinthepictureDoyouknowwhatcauseditApolarbearwasdeadanditis“skinandbones.”Theiceismeltingonthemountain.GlobalwarmingcausesthemeltingoficebergandsomepolarbearsSufferfromthelackoffood.Beforeyouread,lookatthegraphandthepicturebelowanddiscussthesequestionsingroups.2.WhatisthegraphaboutWhatinformationcanyougetfromit1Prereadingtemperatureanomaly溫度距平值是某一系列數(shù)值中的某一個數(shù)值與平均值的差，分正距平和負距平。平均氣溫距平就是一系列平均氣溫（日平均氣溫、月平均氣溫等）與總平均氣溫的差值。平均氣溫距平增高就是說明這個差值增大了，相應時間段內(nèi)的溫度出現(xiàn)了異常。Earthisgettingwarmerandwarmer.3.WhathappenedtothepolarbearPrereadingA:Thepolarbearappearedtohavestarvedtodeathbecauseitcouldnotfindenoughtoeat.Beforeyouread,lookatthegraphandthepicturebelowanddiscussthesequestionsingroups.14.WhytheauthorwriteaboutitPrereadingA:Becauseitcouldshow

oneofeffectsofrisingtemperaturesduetoclimatechange.Beforeyouread,lookatthegraphandthepicturebelowanddiscussthesequestionsingroups.1Read&Think:paragraphsandtheirmainideaPrereading？Earthisgettingwarmerandwarmer&evidence.Para.1Theevidence(alarmingcases)ofclimatechangePara.2ThecauseofrisingtemperaturePara.3TheeffectofrisingtemperaturePara.4SolutionstoreducinggreenhousegasemissionPara.5Read&Think:ThestructureandtexttypePrereading？evidencePara.1evidencePara.2causePara.3effectPara.4solutionsPara.5phenomenaExpositionwritingReadthetextandanswerthequestions:1.Whatistheevidenceofglobalwarming2.Whyisthe“natural”greenhouseeffectimportantandnecessary3.Whataretheconsequenceofhighgreenhousegasemissions4.Whydidtheauthormentiontheclimatescientists’warning5.Whatistheauthor’spurposeofwritingthetext

Readthetextandanswerthequestions:WhatistheevidenceofglobalwarmingWarmingoceanandatmosphere;meltingandrisingsealevel;thestarvedpolaranimals;theextremeweatherandnaturaldisasters.2.Whyisthe“natural”greenhouseeffectimportantandnecessaryBecausegreenhousegasestrapheatandkeepstheearthwarmandhabitable.3.WhataretheconsequenceofhighgreenhousegasemissionsPeopleproducehugeamountsofextragreenhousegasesandmoreheatenergyistrapped,causingthetemperaturetogoup.

4.Whydidtheauthormentiontheclimatescientists’warningBecausethewriterwantstowarnusoftheurgencyoftakingappropriateactionstotackletheissue.5.Whatistheauthor’spurposeofwritingthetextToarouseourawarenessoftheproblemoftheriseoftemperatureandtakingproperactionstoaddresstheglobalwarming.

Readthetextagainandcreateadiagramdescribinghowthegreenhouseeffectworks.Diagramsareveryusefultoolsthatcanbeusedtobrainstormidea,mapoutprocesses,showcauseandeffectrelationships,explainanewideaofconcept,andsoon.Whenyoureadanessayaboutscientificissues,youcantrydrawingadiagram,whichwillnotonlyallowyoutovisualizetheproblemsmoreclearlybutalsocanhelpdemonstrateyourcreativethinkingandproblemsolving.Readpara.12&Think:UseamindmaptolisttheevidenceofclimatechangeWhilereading1ClimatechangeLowseaicelevelsBearscouldnothuntItsdeadbodyfoundStarvedtodeathHadtotravellongerdistancetofindfoodReadpara.3&Think:2Whilereading1.Whyisthe“natural”greenhouseeffectimportantandnecessaryA:The“natural”greenhouseeffectisimportantbecauseitwarmstheEarth's

surfaceandkeepsithabitable.A:Highgreenhousegasemissionsleadto

moreheatenergybeingtrappedintheatmosphereandrisingtemperatures.Readpara.3&Think:2.Whataretheconsequencesofhighgreenhousegasemissions2Whilereading3.Whydidtheauthormentiontheclimatescientists'warningA:Theauthormentionedtheclimatescientists'warningbecausehe/shewantstoknowtheimportanceofenvironmentalprotectionandusewarningstocatchpeople’sattention.Readpara.4&Think:Whilereading3A:Theauthor’spurposeistoappealtopeople’sawarenessofenvironmentalprotectionandinspireustotakeaction/measures.Readpara.5&Think:Whilereading44.Whatistheauthor'spurposeofwritingthistext1.WhatexamplesofextremeweatheranddisastersdoyouknowMakealistofthem.2.DoyouthinkitishumanactivitythatcausedglobalclimatechangeGiveyourreasons3.WhoshouldtakeresponsibilitytoaddressthisclimatechangeWhatshouldyoudotodototackleitGroupdiscussion1.WhatexamplesofextremeweatheranddisastersdoyouknowMakealistofthem.Tsunami,floods,landslides,sandstorms,thunderstorms,earthquakes,hail,hotwaves,coldwaves,typhoons,tornados,hail.2.Doyouthinkitishumanactivityth