Unit 4 Global Warming 教学设计2.docx

Unit 4 Global Warming 教学设计2.docx

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Unit4GlobalWarming教学设计2

Unit4Globalwarming

教学案2

Warming-up

Leadinginbybrainstorm

Putthestudentsintogroupsoffouranddiscussthefollowingquestions:

1.Whatdoweuseenergyfor?

2.Whatarethesourcesofenergy?

3.Whatsourcesarerenewableandwhatarenon-renewable?

1.（differently）

Lights,heating,andallkindsofelectricequipmentuseenergy

2.coal,oil,solarpanels,nuclearenergy,naturalgas,windpower,water,plantwaste,tidalenergy,ect.

2.coal;oil;solarpanels;nuclearenergy;naturalgas;windpower;water;plantwaste;tidalenergy,ect.

3.fillinaform:

Sourcesofenergyrenewable

Uranium（nuclearenergy）renewable

Water（hydro-electricpower）renewable

Plantwaste（biomassenergy）renewable

Hotspringsorgeysersrenewable

Thesea（tidalenergy）renewable

Naturalgasnon-renewable

Pre-reading

1.Weusemuchenergyinourdailylife,whatistheeffectofusingenergyinourworld?

Theuseofenergy---Giveoffcarbondioxide,otherwastedgasesandheatintotheair

---Theearthisbecomingwarmerandwarmer.（globalwarming）

Greenhouseeffect

2.Howdoesagreenhousework?

Thegreenhousetrapstheheatfromthesunandkeepsitfromescaping,whichcanmakeitheatupandsotheplantscangrowthroughoutthecoldperiod.

3.Underthisgreenhouseeffect,whathappens?

Theearthisbecomingwarmerandwarmer.

PeriodTwo:

Reading

Topic:

shortpassageaboutglobalwarming.

Leadingin

TostimulateSs’interestinreadingthetext.DividetheSsintogroupsoffour.Discussthefollowingthreequestions.

1.Whatisglobalwarming?

Theearthisbecomingwarmer

2.Howhasthiscomeabout?

Humanactivity—burningoffossilfuels

Greenhouseeffect—greenhousegases—weneedgases

Hugequantitiesofextracarbondioxide

3.Whataretheeffectsofglobalwarming?

Thesealeveltorise

Severestorms,droughts,famines,thespreadofdiseases,andthedestructionofspecies.

Task1:

Skimming

AsktheSstohaveaquicklookatthemagazinearticle.Thenencouragethemtotellwhattheynoticeabouthowthetextisorganized.

（Answer:

Ithasatitle;afirstparagraphthatisinbold;themaintext;diagrams;twoquotes）

Task2:

Scanning

Toglanceatthetext,andanswerthefollowingquestions.

1.Whowrotethemagazinearticle?

Whatisthenameofthemagazine?

SophieArmstrongwrotethemagazinearticle.

ThenameofthemagazineisEarthCare.

2.Whatarethenamesofthethreescientistsmentionedinthearticle?

TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHambley.

3.Whatdotheythinkaboutglobalwarming?

Dotheyagreewithoneanother?

Theydon'tagreewitheachother.

Dr.JaniceFosterthinkstheeffectsofglobalwarmingcouldbeveryserious.

GeorgeHambleythinksglobalwarmingwillbemildwithfewbadenvironmentalconsequences.

CharlesKeelingbelievesitistheburningofmoreandmorefossilfuelsthatisresultinginabigincreaseincarbondioxide.

4.Whatarethetwographsabout?

GraphIshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.

Graph2isaboutthecarbondioxidecontentintheatmosphere,1957--1997.

5.Whatisthemaintopicofthearticle?

Globalwarming/thewarmingoftheearth.

Task3:

Intensivereading

AskSstoreadthetextcarefullyandsumupthemainideaofeachpart.

Partone（para1）

Introduceadebateovertheissueofglobalwarming.

Skills:

Raisingaquestion

Parttwo（para2-3）

Illustrate（explain）howglobalwarmingcomesabout.

Skills:

givingexamples,usinggraphs,explanation

Partthree（para4-8）

Listtwodifferentattitudesamongscientiststowardsglobalwarming.

Skills:

givingexamples,makingcontrast（comparison）

Partfour（para9）

It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.

Skills:

usingaquestion,leavingreaderstothinkovertheissue.

Task4:

Listening

Listentothetape.Afterit,togetSstofinishEx2onpage27.

Task5:

Discussion

Theearthisbecomingwarmer,inyouropinion,doesitmatter?

Ifitdoes,asastudent,whatcanyoudoaboutit?

PeriodThree:

Usinglanguage

StepI:

Reading“Whatcanwedoaboutglobalwarming.”

Leadingin:

Askstudentstotellwhatcancauseglobalwarming.

Presenttheirideastothewholeclassingroups.

Task1:

Askstudentstoreadthetwolettersandtrytoanswerthefollowingquestions:

1.WhatareOuyangGuang’stwoconcerns?

Gettingsomesuggestionsforwhathecandoaboutglobalwarming.

Asanindividual,hecanhavenoeffectonenvironmentalproblems.

2.DoestheEarthCareagreewithOuyangGuang’sopinionthatindividualscanhavenoeffect?

No.

Task2:

AskstudentstoreadthelettersagainandlistEarthCare’ssuggestions.

Turnelectricalappliancesoffwhennotusingthem.

Don’tturnuptheheat,putonmoreclothes.

Walkorrideabike,don’tdrive.

Recycle.

Buythingsmadefromrecycledmaterials.

Buyproductsthatuselessenergy.

Planttrees.

Talkwithfamilyandfriendsaboutglobalwarming.

Task3:

Askstudentstodiscussthequestions:

Inwhatwayswouldyoutalkwithyourfamilyandfriendsaboutglobalwarming?

StepII:

Writing

Collectinformationaccordingtothestudents’discussion.

Getthestudentstoorganizetheirideasintoseveralsentences.Thenshortenthesentencessotheybecomephrases.

Askstudentstowriteaposterwithaneye-catchingheadingaccordingtotheexampleofhowtopresentaposter.

Samplewritingforaposter:

Showthestudentssomeposters

StepIII:

Listening

Languagepoints:

（Reading）

1.Whatdoyouthinkgreenhousegasesdo?

本句中think后接了一个由what引导的宾语从句。

但应注意的是：

特殊宾语从句即当一般疑问句主句的谓语动词是think,believe,suppose,consider,imagine，guess和suggest等时，表疑问的词要放在主句前即句首。

[正]Whodoyouthinkwillwininthegame?

[误]Doyouthinkwhowillwininthegame?

当然一般情况下宾语从句的疑问词应放在主句之后。

[误]Whydoyouknowwecan'tcutdownthebigtree?

[正]Doyouknowwhywecan'tcutdownthebigtree?

2.compareto/with

Comparedto/withmanywomen,shewasindeedveryfortunate.

compareAwithB

Ifyoucompareherworkwithhis,youwillfindhersismuchbetter.

compareAtoB

Poetshavecomparedsleeptodeath.

3.Thereisnodoubtthat….

Thereissomedoubtwhether….

主句为肯定句时，doubt后使用连词whether。

主句为否定句时，doubt后则使用连词that。

eg:

There'snodoubtthatonedayacurewillbefound.

Thereislittledoubtthathewasthekiller.

4.amountof

anamountof相当数量的;一些

anyamount（of）任何数量（的）;大量（的）

beoflittleamount不重要;无价值

n.数量

largeamountsofmoney大量的金钱

eg:

Theamountofmoneyshouldbewrittenbothinwordsandinfigures.

钱数要用字和数码写出来。

5.Withoutthegreenhouseeffect,theearthwouldbeaboutthirty-threedegreesCelsiuscoolerthanitis.

如果没有温室效应，地球会比现在冷33℃。

这是一个含蓄虚拟条件句。

应该注意有时假设的情况并不以条件从句形式表示出来，而是通过一个介词短语或其他方式表示。

常用的词或短语有：

without,butfor,butthat,otherwise,or,but等。

eg:

Withoutyourhelp（=Ifwehadnothadyourhelp），wecouldnothavesucceeded．

要是没有你的帮助，我们是不会成功的。

Butforelectricity（=Iftherewerenoelectricity），therewouldbenomodemindustry．

要是没有电，就不会有现代工业。

Hewashavingameetingwithhisstudents;otherwise,hewouldhavecome.

他当时正与他的学生进行讨论，否则的话他就来帮我们了。

Hefeltverytiredyesterday,orhewouldhaveattendedtheparty．

他昨天很累,不然他就参加那个聚会了。

6.resultin导致,造成=leadto

Theaccidentresultedinthreepeoplebeingkilled.

这一事故导致他的死亡。

Theaccidentresultedinhisdeath.

resultfrom由…产生，发生

injuriesresultingfromafall.

Theaccident______thedeathoftwopassengers.（B）

A.resultedfromB.resultedin

C.resultedofD.resultedwith

7.ontheotherhand:

另一方面

ontheonehand,ontheotherhand

I'dliketoeatout,butontheotherhandIshouldbetryingtosavemoney.

Iwanttogototheparty,butontheotherhandIoughttobestudying.

我想去参加聚会，但从另一方面来说，我应该留下来学习。

8.concernn.有厉害关系；所关切的事

It’snoconcernofmine.这事与我无关。

n.worry,anxiety担心；担忧

Sheshowedgreatconcernaboutyou.

她很为你担心。

v.tohavetodowithorrelateto涉及；与……有关或相关

Attendtowhatconcernsyou.注意与你有关的事物。

v.Tobeofinterestorimportanceto（常与with,about,in连用）关心；关照

We’reratherconcernedaboutfather’shealth.

我们相当担心父亲的健康。

9.consequence

inconsequence因此

asaconsequence结果

asaconsequenceof由于…的结

10.range

in/withinrange在射程之内

outof/beyondrange在射程之外

11.buildup

Buildupthebusiness

Sediment（沉淀物）buildsupontheoceanfloor.

Thisbuiltupmyhopeaftertheinterview.

12.evenif/though

Iwouldn'ttellyouevenifIknew.

Evenifshesurvives,she'llneverfullyrecover.

Eventhoughhe's24now,he'sstilllikealittlechild.

Icanstillremember,eventhoughitwassolongago.

Languagepoints（Usinglanguage）

1.putupwith:

忍受，容忍

eg.Idon’tknowhowsheputupwithhim.

I’mnotgoingtoputupwiththeirsmokinganylonger.

2.It’sOKtoleaveanelectricalapplianceon

leave后接宾语和宾语补足语，表示让…保持某种状态或做某事

Whydidyouleavetheboycryingoverthere?

Thebombblastleft5peopledead.

Leavethericetocook5minutes.

3.solongas=aslongas只要

Wewillgosolongastheweatherisgood.

4.electrical用电的；与电有关的

electricalequipment电气设备;anelectricalworker电工

5.Remember—yourcontributioncounts.

count重要；计算总数

Everypointinthisgamecounts.（重要）

Shebegantocountuphowmanygueststheyhadtoinvite.（计算）