高中英语 Unit22 Environmental Protection The Second Period Lesson 1 Global Warming教案 北师大版选修8Word格式文档下载.docx

高中英语 Unit22 Environmental Protection The Second Period Lesson 1 Global Warming教案 北师大版选修8Word格式文档下载.docx

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Inthelastfewdecades,scientistshavereachedconsensusandreportedthathumanbeingsarecausingchangesintheEarth’sclimate—somethingpreviouslyseenasbeyondourcontrol.

2.Abilitygoals能力目标

Learnwhatglobalwarmingisandenablestudentstolearnitscausesandconsequences.

3.Learningabilitygoals学能目标

Byreadinganarticlehelpstudentstolearnhowtheycanhelpsolvetheproblemofglobalwarming.

Teachingimportantpoints教学重点

Whathumanactivitiesarecausingglobalwarmingandhowwecanhelpsolvetheproblemofglobalwarming.

Teachingdifficultpoints教学难点

Howwecanhelpsolvetheproblemofglobalwarming.

Teachingmethods教学方法

Listening,reading,discussing.

Teachingaid教具准备

Multimediacomputer.

Teachingprocedures&

ways过程与方式

StepILeadingin

Inthisprocedurestudentswilltalkaboutthecausesandconsequencesofglobalwarming.Beginthelessonbyaskingstudentstodiscussthequestionsinbeforeyoustart

T:

YesterdaywelearnedfromthepassageinCultureCornerthatgasesfromburningcoalandoilarethemajorcausesofglobalwarming.Didyoumakeyoursurveyonhowstudentscometoschool?

S1:

Iasked40students.Teninthefortycometoschoolbybus.Twenty-oneridebicycles.Eightofthefortytakeacarandonlyonewalkstoschool.

...

Fromthesurveyyoumadewecanseemostofstudentsinourschooltakeagreenwaytoschool.I’mgladwearenothavingsomanycars.Becausegasespumpedintotheatmospherefromcarswillspeedupglobalwarming.Haveyounoticedthatin2006wehadaverywarmwinter?

ExpertssayglobalwarminghaschangedtheclimateinChina.Inthisclasswearegoingtolearnmoreaboutglobalwarming.Wewillreadanarticle“Canwetaketheheat?

”Beforewestartthetext,pleasediscussthequestioninBeforeyoustart.

StepIIBeforeyoustart

DiscussthetwoquestionsinBeforeyoustartandworkoutthemeaningsofthegivenwords.

OK,openyourbooksanddiscussthequestioninBeforeyoustartonPage6.Whichcountriesdoyouthinkcontributemoretoglobalwarming,developedcountriesordevelopingcountries?

Ss:

Developedcountries.Becausetheyhavemorecarsandfactoriesandgasesfromcarsandfactoriesarethemajorcauseofglobalwarming.

Goodanswer.PleasescanthetextforthegivenwordsinEx2andtrytoworkouttheirmeaning.

Whilestudentsarediscussingthewords,Teachershouldwalkaroundtheclassroomandgivenecessaryhelpwhenneeded.

Severalminuteslater,askstudentstopresenttheiranswerseitherinEnglishorChinese.Studentsmayevenbeencouragedtoexplainthemeaningsusingpictures.ShowthesuggestedanswersonthePowerPoint.

StepIIIReadtolearn

Dealwiththereadingpart.

Scanning

Askstudentstoscanthetextandfindwhatexactlyglobalwarmingis.

WhatisthetitleofLesson1?

GlobalWarming.

Doyouknowwhatexactlyglobalwarmingis?

Pleasescanthetextandfindtheanswerinthetext.

GlobalwarmingreferstoanaverageincreaseintheEarth’stemperature.

Quitegood!

Thenskimthetextandfindwhathumanactivitiesarecausingglobalwarming.

S:

Asaresultofincreasedindustry,agriculture,thecuttingdownofforests,theincreaseintransportandtheburningoffuels,nearly6tonesofcarbondioxidegoesintotheatmosphereeveryyearforeveryoneoftheEarth’s6billionpeople.Overthelast100years,theglobalaveragetemperaturehasincreasedby1°

F.Ifwecontinuetoproducecarbondioxideandothergasesinsuchquantities,wearecondemninglifeonEarthandshouldexpectsevereconsequences.

Skimming

ShowthefollowingformonthePowerPointandaskthemtoworkingroupsandcompletetheform.

term

definition

causes

consequences

howtosolvetheproblem

Globalwarming

Fiveminuteslater,showthesuggestedanswersonthePowerPoint.

referstoanaverageincreaseintheEarth’stemperature.

Whengreenhousegasesintheatmosphereincrease,moreheatistrapped.（thegreenhouseeffect）

TheEarth’stemperaturerises.

Government’sactionandeachpersonshouldplaytheirpart（smallchangesmadebyeveryoneworldwide）.

AskstudentstoskimthetextandthenfinishEx3onPage7.Studentsmaydiscussthequestionsingroups.

LookthroughthequestionsinEx3onPage7first.Thenskimthetexttofindtheanswers.

Thencheckt