高二英语选修6第4单元学案Word文件下载.doc
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3_________ n.大灾难;
浩劫4._________ adj.胡乱的;
任意的
5._________ v.反对;
反抗;
与(某人)较量6_________. n.洪水;
水灾
7._________ v.同意;
捐赠;
订阅8._________n.燃料
II.重点短语
eabout_________2.keepon_________
3.subscribeto_________ 4.beopposedto_________
5._________大量的6. ________即使_
7._________上升;
增长;
升起 8_________依靠,依赖
9_________温室效应10._________用光,耗尽
Inclass(课上合作探究)
Learningprocedures
Step1 Warmingup
1.Warmingupbyreadingandtalking:
Readthroughtheexercise.Putstudentsingroupstotalkaboutwhatweuseenergyfor,discusswhatarethesourcesoftheseenergyandwhetherthefollowingsourcesarerenewableornon-renewable.
________________________________________________________________
Thingsthatuseenergy
Sourcesofenergy
Renewable/non-renewable
lights
heating
television
cassetteplayer
videorecorder
computer
fridge
stove
hairdryer
...
coal
oil
naturalgas
windpower
solarenergy
nuclearenergy
hydro-electricpower
biomassenergy
geothermalenergy
tidalenergy
Step2 Pre-reading
1.Lookatthepictureofagreenhouseandaskstudentswhatagreenhouseismadeofandwhatitspurposeis.
2.Askstudentswhattheythink“greenhousegases”areandwhattheythinkgreenhousegasesdo.Lookatthepictureaboveandexplainittotheirpartners.
Step3 Readingandcomprehending
Task1.Skimming
Askstudentstoreadthepassagequicklysoastogetthekeywordsandgeneralideaofeachparagraphandanswerthefollowingquestions:
(1)Whatisthemaintopicofthearticle?
________________________________________________________________________
(2)Whowrotethemagazinearticle?
Whatisthenameofthemagazine?
(3)Whatarethenamesofthethreescientistsmentionedinthearticle?
Dotheyagreewithoneanother?
(4).Whatdotheythinkaboutglobalwarming?
Dotheyagreewithoneanother?
(5).Whatarethetwographsabout?
Task2.Scanning
Choosethebestanswerstoeachquestionaccordingtothetext
(1).Howmuchdidthetemperatureriseinthe1900s?
A.OnedegreeFahrenheit.B.OneCelsiusC.TwodegreesD.ThirtydegreeCelsius
(2).Whatcausesthetemperatureoftheearthtoincrease?
A.CuttingtreesB.Wastingthefarmland
C.RunningoutoftheriverwaterD.Burningfossilfuels
(3).Whoaccuratelymeasuredtheamountofcarbondioxideintheatmospherefrom1957to1997?
A.Dr.JaniceFoster.B.Fahrenheit.C.CharlesKeelingD.GeorgeHambley
(4).GeorgeHambleybelievesthatmorecarbondioxideisactually_____.
A.abadthingB.adangerousthing.C.acomparativethingD.apositivething
(5).Whatisthemainideaofthispassage?
A.Globalwarming.B.Floodphenomenon.C.Makingmethane.D.Makinggreenhouses
Task3.Carefulreading
Readthepassagecarefullyandjudgewhetherthestatementsaretrue(T)orfalse(F).
①JaniceFosterbelievesthatglobalwarmingiscausedbytheburningfossilfuels.( )
②Naturalgasisagreenhousegas.( )
③Carbondioxideisabyproductofburningfossilfuels.( )
④PeopleacceptCharlesKeeling'
sdatabecausehetookaccuratemeasurements.( )
⑤Floodingcouldbeoneoftheeffectsoffutureglobalwarming.( )
⑥GeorgeHambleybelievesscientistsarejustguessingabouttheeffectsofglobalwarming.( )
⑦GeorgeHambleyisworriedabouttheeffectsofcarbondioxideonplantgrowth.( )
⑧Itisclearwhattheeffectsofglobalwarmingwillbe.( )
Task4.Structureanalyzing
Askstudentstoreadthetextcarefullyandtrytofindouthowmanypartstheycandividethetextintoandfindoutthemainideaofeachpart. PartMainidea
Part1(Paragraph__)AIt'
suptoreaderstothinkanddecidewhetherpeopleshoulddo
somethingaboutglobalwarmingornot.
Part2(Paragraphs__to__)BToillustratehowglobalwarmingcomesabout.
Part3(Paragraph__)CTointroduceadebateovertheissueofglobalwarming.
Part4(Paragraph__)DTolisttwodifferentattitudesamongscientiststowardstheglobalwarming
Step4随堂达标检测
Theearthisbecomingwarmeranditishumanactivity_______1hascausedthisglobalwarming.Allscientists_________2totheviewthattheincreaseintheearth’stemperatureis_________3totheburningoffossilfuels.Somebyproductsofthisprocess,especiallycarbondioxide,arecalled‘greenhouse’gases.Somesmallamountsofgasesintheatmosphere_________4heatfromthesunandthereforewarmtheearth.Soweneedthosegases.However,theproblembeginswhenweaddhuge_________5ofextracarbondioxideintotheatmosphere.Itcausedtheglobaltemperatureto__________6up.
Ascientist__________7CharlesKeelingmadeaccuratemeasurementsoftheamountofcarbondioxideintheatmosphere.Buthowhighwillthetemperature_________8go?
_________9ifwestartreducingtheamountofcarbondioxideandothergreenhousegases,theclimateisgoingto_______10onwarmingfordecadesorcenturies.Nowoneknowstheeffectsofglobalwarming.
Period2 Languagepoints
1._________adj.能再生的;
可更新的2.________n.温室;
花房
3.________prep.每;
每一4.________n.资料;
数据
5.________n.洪水;
水灾6.________n.旱灾;
干旱
7.________vt.反对;
与(某人)较量8.________adj.温和的;
温柔的;
淡的
1.在20世纪期间____________2.自然现象____________
3.另一方面____________4.通过燃烧化石燃料____________
5.人类活动
____________6.有关系,有影响____________
7.大体上,基本上____________8.高达5摄氏度____________
III.重点句型
1.Thatprobablydoesn’tsoundverymuchtoyouortomebutitisarapidincreasecomparedtomostnaturalchanges.
(译)________________________________________________________________________
2.Thereisnodoubtthattheearthisbecomingwarmerbutthereisfiercedebateoverwhetheritishumanactivitythathascausedthisglobalwarmingorwhetheritisjustanaturalphenomenon.
3.Withoutthe“greenhouseeffect”,theearthwouldbeaboutthirty-threedegreesCelsiuscoolerthanitis.
(译)________________________________________________________________________
Inclass(课上合作探究)
Languagepoints
1.There_is_no_doubt_thattheearthisbecomingwarmer(seeGraph1)andthatitishumanactivitythathascausedthisglobalwarmingratherthanarandombutnaturalphenomenon....毫无疑问地球正在变暖(见表一),二地球变暖正是人类活动导致的,而不是一种无规律的自然现象。
析:
在Thereisnodoubt后常可跟that引导的同位语从句(在肯定句中,doubt后面有时可跟whether引导的从句)。
Thereisnodoubtthatyouwillsucceedifyoutryyourbest.
毫无疑问如果你尽最大努力你一定会成功。
Thereisnodoubtthathewillcomeontime.他一定会准时来。
类似常用结构:
Thereisnoknowing/telling...没法知道/说……
Thereisnoneed...没有必要……
Thereisnoquestion...……是没有问题的。
Thereisnoreason...没有理由……
Thereisnopossibilitythat...……是没有可能的。
Itisno/smallwonderthat...(Nowonderthat)...难怪……
Itisawonderthat...……真奇怪/真是令人惊奇。
randomadj胡乱的,任意的atrandom随意的,随便的
活学活用
1).Someresearchersbelievethatthereisnodoubt____acureforAIDSwillbefound.
A.whichB.whatC.thatD.whether
2).______________________(不要随便说话),andkeepsilentatthemeeting.
II单句改错
1.Qualitiesofsoilhasbeenwashedawaybecausesomanytreeswerecutdown.
__________________________________________________________________
2.I’dliketoeatout.butintheotherhandIshouldsavemoney.
3.It’srainingoutside;
you’dbetterkeepthechildrengoingout.
4.Itisnodoubtatallthatwedidtherightthing.
Period3Languagepoints
Completethefollowingsentencesaccordingtothetexts.
1.Anenergysourceisrenewablewhensuppliesofitnever____________.
2.Itisarapidincrease______________________________.
3.Thereis____________thattheearthisbecomingwarmingbutthereis__________________whetheritis__________________hascausedthisglobalwarmingorwhetheritis________________________.
4.______thegre