高二英语选修6第4单元学案.doc

高二英语选修6第4单元学案.doc

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高二英语选修（6）unit4学案审核高二英语备课组主备人杨少英

Unit4　Globalwarming

Period1　WarmingUp，Pre－reading，Reading

Learningaims：

1.Getstudentstoknowaboutglobalwarminganditseffect；

2.Toenablethestudentstorealizewhatwecandoaboutglobalwarming.

Learningimportantpoints

Toenablethestudentstolearnaboutglobalwarmingandtodeveloptheirreadingability.

Learningdifficultpoint

Toenablethestudentstotalkaboutwhatweshoulddotopreventglobalwarming.

Beforeclass（课前自主学习）

I.重点单词

1._________ v.消费；消耗；耗尽2._________ v.趋向；易于；照顾

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. Part