高二英语选修6第4单元学案Word文件下载.doc

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