英语选修6第4单元Reading.ppt

《英语选修6第4单元Reading.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、人教课标高二选修6Unit4Unit4GlobalwarmingFromthefollowingpictures,youwillknowwhereallthisenergycomesfrom.windmillsacoalpowerstationanoilrefineryanuclearpowerplantsolarpanelshydro-electricdamSamplelistsThingsthatuseenergySourcesofenergyRenewable/non-renewablelightheatingcoalnon

2、-renewableoilnon-renewabletelevisioncassetteplayervideorecordercomputernaturalgasnon-renewablewind(windpower)renewablesun(solarenergy)renewableuranium(nuclearenergy)non-renewablefridgestovewashingmachinehairdryerwater(hydro-electric)renewableplantwaste(biomassenergy)r

3、enewablehotspringsorgeysers(geothermalenergy)renewablethesea(tidalenergy)renewableRenewableornon-renewable?Renewableornon-renewable?Whatistoldinthepicture?Whatisthegreenhousemadeandusedfor?Agreenhouseismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.H

4、owdoesitwork?Theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.Whatarethe“greenhousegases”?Intheatmospheresurroundingtheearththerearegasescalled“greenhousegases”,inclu

5、dingcarbondioxide,methane(甲烷,沼气)andwatervapor.Whatdoyouthinkgreenhousegasesdo?Theytraptheheatofthesunandkeeptheairsurroundingtheearthwarm.MainideasofeachpartWritingtechniques(Paragraph1)Introduceadebateovertheissueofglobalwarming.RaisingaquestionMainideasofeachpartWri

6、tingtechniques(Paragraphs2---3)Illustratehowglobalwarmingcomesabout.Givingexamples,usinggraphs,explanation.(Paragraphs4---5)Listtwodifferentattitudesamongscientiststowardsglobalwarming.Givingexamples,makingcontrast.(Paragraph6)It’suptoreaderstothinkanddecidewhetherpeo

7、pleshoulddosomethingaboutglobalwarmingornot.Usingaquestion,leavingreaderstothinkovertheissue.Readthetextcarefullyandfillintheblanks.ScientistsOpinionJaniceFoster◆Weneed______likecarbondioxide,methaneandwatervapour,butifweaddhuge___________extracarbondioxidetotheatmosp

8、herebyburningfossilfuels,itwillcausethe________________togoup.gasesquantitiesofglobaltemperatureScientistsOpinionJaniceFoste