【课件】Unit3ReadingandThinking课件2021-2022学年高中英语人教版（2019）选择性必修第三册.pptx

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1、Unit 3 Environmental Protectionglacier(s)/ice sheetice breaking offEarth provides enough to satisfy every mans needs,but not every mans greed.“莫罕达斯莫罕达斯卡拉姆昌德卡拉姆昌德甘地甘地（Mohandas Karamchand Gandhi，1869.10.21948.1.30），），尊称尊称“圣雄甘地圣雄甘地”（Mahatma Gandhi），），印度民族解放运动印度民族解放运动的领导人、的领导人、印度国印度国民大会党民大会党领袖。领袖。Look&P

2、redict:1.Whatisthetextmainlyabout?Pre-reading？Itismainlyaboutglobalclimatechange.Beforeyouread,lookatthegraphandthepicturebelowanddiscussthesequestionsingroups.2.Whatisthegraphabout?Whatinformationcanyougetfromit?1 1Pre-readingtemperature anomaly温度距平值温度距平值是某一系列数值中的某一个数值与平均值的差，分正距平和负距平。平均气温距平就是一系列平均气

3、温（日平均气温、月平均气温等）与总平均气温的差值。平均气温距平增高就是说明这个差值增大了，相应时间段内的温度出现了异常。Earth is getting warmer and warmer.3.Whathappenedtothepolarbear?Pre-readingA:Thepolarbearappearedtohave starved to death because it could not find enough to eat.Beforeyouread,lookatthegraphandthepicturebelowanddiscussthesequestionsingroups.

4、1 14.Whytheauthorwriteaboutit?Pre-readingA:Becauseitcouldshowoneofeffectsofrisingtemperaturesduetoclimatechange.Beforeyouread,lookatthegraphandthepicturebelowanddiscussthesequestionsingroups.1 1Read&Think:paragraphsandtheirmainideaPre-reading？Earthisgettingwarmerandwarmer&evidence.Para.1Theevidence(

5、alarmingcases)ofclimatechangePara.2ThecauseofrisingtemperaturePara.3TheeffectofrisingtemperaturePara.4SolutionstoreducinggreenhousegasemissionPara.5Read&Think:ThestructureandtexttypePre-reading？evidencePara.1evidencePara.2causePara.3effectPara.4solutionsPara.5phenomenaExposition writingReadpara.1-2&

6、Think:UseamindmaptolisttheevidenceofclimatechangeWhile-reading1 1ClimatechangeLowsea-icelevelsBearscouldnothuntItsdeadbodyfoundStarvedtodeathHadtotravellongerdistancetofindfoodReadpara.3&Think:2 2While-reading1.Whyisthe“natural”greenhouse effectimportantandnecessary?A:The“natural”greenhouseeffectisi

7、mportantbecause it warms the Earths surface and keeps it habitable.A:Highgreenhousegasemissionslead to more heat energy being trapped in the atmosphere and rising temperatures.Readpara.3&Think:2.Whataretheconsequencesofhighgreenhousegasemissions?2 2While-readingSummarymindmap:WhatsthecauseofGreenhou

8、seEffect?2 2While-readingGreenhouseEffectNaturalKeepingEarthsclimatewarnandhabitableMan-madeCausingEarthssurfacetemperaturetorisequicklyiftoomuchheatenergyistrapped3.Whydidtheauthormentiontheclimatescientistswarning?A:Theauthormentionedtheclimatescientistswarningbecausehe/shewantstoknowtheimportance

9、ofenvironmentalprotectionandusewarningstocatchpeoplesattention.Readpara.4&Think:While-reading3 3A:Theauthorspurposeistoappealtopeoplesawarenessofenvironmentalprotectionandinspireustotakeaction/measures.Readpara.5&Think:While-reading4 44.Whatistheauthorspurposeofwritingthistext?Readpara.5&Think:While

10、-reading5 55.Whataretheconsequencesoftheglobaltemperaturerise?A:Theriseintemperatureledtoextremeweather/naturaldisasters(suchasextremerainstorms,heatwaves),whichresultsseriousdamage,costinghumanlives,economiclosses.WHATISACARBONFOOTPRINT?Fromcookingapotroasttojettingawayfortheweekend,thechoicesyouma

11、keinyourday-to-daylifeleaveamarkontheenvironment.A carbon footprint is defined as thetotalamountofgreenhousegasesproducedtodirectlyandindirectlysupporthumanactivities,usually expressed in equivalent tons of carbon dioxide(CO2).Post-readingCreateadiagramdescribinghowthegreenhouseeffectworks.5 5Draw a

12、 diagramDiagramsareveryusefultoolsthat can be used to brainstorm ideas,map out processes,show cause and effect relationships,explain a new idea or concept,and so on.Whenyoureadanessayaboutscientificissues,youcantrydrawingadiagram,whichwillnotonlyallowyoutovisualisetheproblemsmoreclearlybutalsocanhelpdemonstrateyourcreativethinkingandproblem-solving.Post-readingPost-readingWhatelsecanwedotoreduceclimatechange?