unit 4 global warming lanuage points（教师版）

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1、Book6Unit4学案Reading一.Preview:para.1thetemperatureof…的温度comparedwith与…比较comeabout发生Para.2humanactivity人类活动globalwarming全球变暖arandomphenomenon任意的现象Para.3subscribeto同意dueto由于theburningoffossilfuels化石燃料的燃烧naturalgas天燃气byproduct副产品greenhouseeffect温室效应quantitiesof大量的tendtodosth

2、趋向于….goup上升Para.4makeaccuratemeasurements做出准确的测量theamountof…..的数量Para.5resultin导致beaslow/highas…像…一样低/高Para.6theattitudeofsb某人的态度increaseby…增加了…leadtosth导致…agreewithsb同意某人ariseof…的上升thespreadof…的传播beopposedto反对…Para.7buildup逐渐增强evenif/though即使keepon继续adecade十年acentury一百年

3、，一个世纪theeffectof…的影响二．Choosethebestanswer.1.WhichofthefollowingstatementsisNOTtrueaccordingtothetext?A.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.B.Carbondioxideisabyproductofburningfossilfuels.C.Naturalgasisagreenhousegas.D.JaniceFosterbelievesthat

4、globalwarmingiscausedbyburningfossilfuels.2.WhichofthefollowingisDrJaniceFoster’sopinion?A.Theresultofthetemperatureincreasewillbeserious.B.Theamountofwarmingisnothingserious.C.Weneedn’tworryabouthighlevelsofcarbondioxide.D.Globalwarmingisanaturalphenomenon.3.Whofoundout

5、theamountofcarbondioxideintheatmospherefrom1957to1977?A.Dr.JaniceFoster.B.CharlesKeeling.C.GeorgeHambley.D.SophieArmstrong.4.Whatisthemaintopicofthearticle?A.GreenhousegasesB.GreenhouseeffectC.GlobalwarmingD.EnvironmentalpollutionDABC三．GrammarCloze（根据课文内容完成短语）TheEarth’ss

6、urfacetemperaturehasrisenbyaboutonedegreeFahrenheittoday.Thereisnodoubtthattheearthisbecoming1_______(warm).But2____hasthiscomeaboutanddoesitmatter?Peoplehavefiercedebatesaboutwhether3___ishumanactivitythathascausedthisglobalwarming,4________(compare)withmostofthenatural

7、changes.ManyscientistslikeDr.JaniceFosterbelievethatpeoplehavecausedtheincreaseintheearth’stemperatureby5_______(burn)fossilfuelslikecoal,naturalgasandoiltoproduceenergy.Somebyproductsofthisprocessarecalled“greenhouse”6._______(gas),themostimportantoneof7______iscarbondi

8、oxide.Theincreasedamountofcarbondioxidemeansthatmoreheatenergy8________(trap)intheatmospherecausingtheg