选修六Unit4 Global warming Period 1.docx
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选修六Unit4GlobalwarmingPeriod1
Unit4 Globalwarming
本单元的中心话题是人类当今面临的环境问题，主要探讨了“全球变暖”和“节约能源”等方面的问题。
由于人类过多使用不可再生能源，大气中二氧化碳的含量逐年增加，导致全球气温上升。
通过学习本单元，让学生了解能源分为“不可再生能源”和“可再生能源”，帮助学生树立“节约能源、保护环境”的主人翁意识。
本单元的主要教学内容如下表所示：
类别
课程标准要求掌握的内容
话题
Globalwarming，pollutionandtheimportanceofprotectingtheearth
[来源:
学|科|网]
[来源:
学科网]
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学_科_网Z_X_X_K]
[来源:
学科网ZXXK]
词
汇
tend[来源:
学|科|网]
v.趋向；易于；照顾
catastrophe
n.大灾难；浩劫
oppose
v.反对；反抗；与（某人）较量
flood
n.洪水；水灾
state
v.陈述；说明
consequence
n.结果；后果；影响
glance
v.看一下；扫视 n．一瞥
existence
n.生存；存在
quantity
n.量；数量
commitment
n.承诺；交托；信奉
range
n.种类；范围
pollution
n.污染；弄脏
tendency
n.趋向；趋势
growth
n.增长；生长
circumstance
n.环境；情况
motor
n.发动机
opposed
adj.反对的，对立的
can
n.容器；罐头
steady
adj.平稳的；持续的
microwave
n.微波炉；微波
widespread
adj.分布广的；普遍的
educator
n.教育工作者；教育家
average
adj.平均的
contribution
n.贡献
consume
v.消费；消耗；耗尽；吃完
presentation
n.显示；演出
subscribe
v.同意；捐赠；订阅
disagreement
n.分歧；不一致
advocate
v.拥护；提倡；主张
random
adj.胡乱的；任意的
refresh
v.使恢复；使振作
mild
adj.温和的；温柔的；淡的
graph
n.图表；坐标图；曲线图
outer
adj.外部的
phenomenon
n.现象
electrical
adj.电的；与电有关的
fuel
n.燃料
casual
adj.随便的；偶然的
data
n.资料；数据
nuclear
adj.核的；核能的
trend
n.趋势；倾向
per
prep.每；每一
comeabout发生；
造成
keepon继续
subscribeto同意；赞成；订购
onthewhole大体上；基本上
quantitiesof大量的
onbehalfof代表……一方；作为……的代言人
goup上升；增长；升起
putupwith忍受；容忍
resultin导致
solongas只要
beopposedto反对
andsoon等等
evenif即使
greenhouseeffect温室效应
句
型
1....it_ishumanactivitythathascausedthisglobalwarming... （emphatic“it”）
2....itisarapidincreasewhen_compared_toothernaturalchanges.（ellipsis）
3.Thereisnodoubtthat_the_earth_is_becoming_warmer...（theappositiveclause）
4.Withoutthe“greenhouseeffect”，theearthwould_beaboutthirty－threedegreesCelsiuscoolerthanitis.（thesubjunctivemood）
功
能
1.同意与不同意（Agreementanddisagreement）
Exactly.You'reright.
Iagree. That'scorrect/true/right.
I'mafraidIdisagreewithyou.I'mafraidnot.Idon'tthinkso.
Noway.Idon'tagree.Idoubt...
2．责备与抱怨（Blameandcomplaint）
I'msorrytobringthisup，but... I'msorrytohavetosaythis，but...
Theyshouldn'thavedoneit.Theyaretoblame.
Perhaps/Maybetheyshould/oughtto...Whydon'tyoudosomethingaboutit？
语法
“it”的用法（theuseof“it”）
（2）
...it_ishumanactivitythathascausedthisglobalwarming...
教
学
重
点
1.Getstudentstoknowaboutglobalwarminganditseffect；torealizewhatwecandoaboutglobalwarming.
2．Havestudentslearnsomeusefulnewwordsandexpressionsaboutglobalwarmingandletthemlearneffectivewaystomasterthem.
3．Enablestudents
tograspandusetheexpressionsofagreementanddisagreement，blameandcomplaint.
4．Letstudentslearnthenewgrammaritem：
theuseof“it”
（2）．
5．Developstudents'listening，speaking，readingandwritingability.
教学难点
1.Enablestudentstomastertheuseof“it”
（2）．
2．Letstudentslearntowriteashortpassagetotellothershowtosolvetheproblemofglobalwarming.
3．Developstudents'integrativeskills.
课时安排
Periodsneeded：
6
Period1 WarmingUp，Pre－reading，ReadingandComprehending
Period2 LanguageStudy
Period3 Grammar—theUseof“It”
（2）
Period4 ListeningandSpeaking
Period5 ReadingandWriting
Period6 SummingUp，LearningTipandAssessment
Period1 WarmingUp，Pre－reading，
ReadingandComprehending
教学内容分析
Thisisthefirstteachingperiodofthisunit.Thecentralpartofthisperiodisthereadingpassagewiththetitleof“TheEarthIsBecomingWarmer—ButDoesItMatter？
”talkingabouttheglobalissuewhichhasagreateffectonhumanbeings'life.
WarmingUpgivessixpicturestohelpstudentslistthesourcesofenergytheycanthinkofinourdailylife.Thentheywillbeledtodiscusswhichenergysourceis“renewable”andwhichis“non－renewable”．Thispartisdesignedtohelpthestudentstorecalltheirbackgroundknowledgeaboutenergyandpreparesstudentsforthewhole
unit.
Pre－readingprovidesapictureofagreenhouseandthentellsuswhatagreenhouseisandwhat“greenhousegases”are.Thestudentswillbeledtodiscusswhattheythinkgreenhousegasesdo，leadingtothetopicofthereadingpassage.
Readingis
apassagefromanenvironmentalmagazineforyoungpeople.Itputsforwardthepossibleeffectofincreasedcarbondioxideintheatmosphereanddifferentpointsofviewaboutit.Italsoanalyzesthecausesoftheearth'sincreasedtemperature.Itposesquestionsandencouragesstudentstothinkabouttheissues.Therearetwographsinitthattellusthe“temperaturedifferencefromlong－termaverage,1860－2000”and“carbondioxidecontentintheatmosphere,1957－1997”．Charactersinthepassage—DrJaniceFoster，GeorgeHambleyandCharlesKeelingareallrealpersonsandtheirviewsreflecttheviewsofsomescientiststoday.
Comprehendingconsistsofthreewrittenororalexercisesforthestudentstodosoastohelpthestudentstogetabetterunderstandingofthetext，thatistosay，tohelptheteachertocheckhowmuchthestude
ntshaveunderstoodthetext.
三维目标设计
Knowledgeandskills
1．Toknowthemeaningsofthefollowingnewwordsandphrases：
consume（消费；消耗；耗尽），comeabout（发生；造成），random（胡乱的；任意的），phenomenon（现象），subscribe（同意；捐赠；订阅；签署文件），subscribeto（同意；赞成；订购），fuel（燃料），quantity（量；数量），quantitiesof（大量的），tend（趋向；易于；照顾），goup（上升；增长；升起），per（每；每一），data（资料；数据），resultin（导致），trend（趋势；倾向），catastrophe（大灾难；浩劫），flood（洪水；洪灾），oppose（反对；反抗），opposed（反对的；对立的），beopposedto（反对），consequence（结果；后果），state（陈述；说明），range（种类；范围），evenif（即使），keepon（继续），glance（看一下；扫视），steady（平稳的；持续的），steadily（平稳地，持续地）
2．Tolearnaboutsomefactsandviewsaboutglobalwarming.
3．Tolearnhowtheinformationisorganized.
4．Todevelopthestudents'readingabilitybyskimmingandscanningthepassage.
5．Todevelopthestudents'speakingabilitybytalkingaboutglobalwarming.
Processandmethods
1．WhiledoingWarmingUptheteachercanleadinthetopicofthisunitbyshowingstudentssomepicturesorvideosaboutsourcesofenergy，makingthestudentsrecalltheirownknowledgeaboutenergy.
2．DuringPre－readingtheteachercangoaroundtheclassroomanddiscussthequestionswithseveralstudents.Thisdiscussionshouldbestudent－centeredandleadthemtothetopicofglobalwarming.Theteachershouldalsoaskthestudentstolookatthegraphsinthereadingpassageandtrytofindoutthegeneralideaofthetext.
3．WhiledoingReadingandComprehending，theteachermayfirstaskthestudentstoreadthetextquicklytogetthegeneralideaofeachparagraph.Afterreadingthepassage，studentsareencouragedtoanswersomequestionsanddiscussthetextstructure.
4．Toconsolidatethecontentsofthereadingpassage，thestudentsshouldberequiredtoretellthetextintheirownwordsattheendoftheclass.
Emotion，attitudeandvalue
1．Tomakestudent
srealizetheharmofglobalwarmingandtheimportanceofenvironmentalprotection.
2．Todevelopstudents'senseofcooperativelearning.
教学重、难点
1．Toenablethestudentstolearnaboutglobalwarmingandtodeveloptheirreadingability.
2．Toenablethestudentstotalkaboutwhatweshoulddotopreventglobalwarming.
1 Warmingup
1．Warmingupbyreadingandtalking：
Readthroughtheexercisewiththeclass.Putstudentsingroupsoffourtotalkaboutwhatweuseenergyfo
r，whatarethesourcesoftheseenergyandwhetherthesourcesarerenewableornon－renewable.
Suggestedanswer：
Thesixphotosare：
windmills；acoalpowerstation；anoilrefinery；anuclearpowerplant；solarpanels；ahydro－electricdam.
2．Warmingupbydiscussion：
Drawaformontheblackboardasfollows：
Thingsthatuseenergy
Sourcesofenergy
Renewable/non－renewable
Letthestudentshaveadiscussionandcollectsuggestionsfromstudentsandwritethemundertheappropriateheading.
Suggestedanswer：
Thingsthatuseenergy
Sourcesofenergy
Renewable/non－renewable
lights
heating
television
cassetteplayer
videorecorder
computer
fridge
stove
hairdryer
...
coal
non－renewable
oil
non－renewable
naturalgas
non－renewable
windpower
renewable
solarenergy
renewable
nuclearenergy
non－renewable
hydro－electricpower
renewable
biomassenergy
renewable
geothermalenergy
renewable
tidalenergy
renewable
2 Pre－reading
1．Showapictureofagreenhousetostudentsandaskthemwhatagreenhouseismadeofandwhatitspurposeis.
Suggestedanswer：
It'smadeofglassandplantscangrowinitwhenit'scoldoutside.
Askthestudentshowitworks.
Suggestedanswer：
Theglasstrapstheheatfromthesun，makingtheairwarmsothatplantsgrowbetter.
2．Askstudentswhattheythink“greenhousegases”areandwhattheythinkgreenhousegasesdo.Lookatthepictureaboveandexplainittotheirpartners.
Suggestedanswer：
Greenhousegasesperformthesamefunctionastheglassinaglasshouse：
theytraptheheatofthesunandkeeptheairsurroundingtheearthwarm.Thisiscalledthegreenhouseeffect.）
3 Readingandcomprehending
1．Fastreading
Askstudentstoreadthepassagequicklysoastogetthekeywordsandgeneralideaofeachparagraphandanswerthefollowingquestions：
（1）Whatis
themaintopicofthearticle?
________________________________________________________________________
（2）Whowrotethemagazinearticle？
Whatisthenameofthemagazine?
_____________________________________________________________
___________
（3）Whatarethenamesofthethreescientistsmentionedinthearticle？
Dotheyagreewithoneanother?
________________________________________________________________________
Suggestedanswers：
（1）Globalwarming/thewarmingoftheearth.
（2）SophieArmstrong，EarthCare.
（3）DrJaniceFoster，CharlesKeeling，GeorgeHamb
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