Unit 22 The Twelfth Period Bulletin BoardUnit Diary 教学设计优质公开课北师大选修8精品Word文档格式.docx

Unit 22 The Twelfth Period Bulletin BoardUnit Diary 教学设计优质公开课北师大选修8精品Word文档格式.docx

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2.Learningabilitygoals.学能目标

Helpthestudentslearnhowtoassesstheirlearningovertheunit.

Teachingimportantpoints教学重点

HelpstudentstoformgoodhabitsoflearningEnglish.

Teachingdifficultpoints教学难点

Howtoimprovestudents’learningstrategies

Teachingmethods教学方法

Reading，discussingandsummarizing

Teachingaids教具准备

Multi-computer

Teachingprocedures&

ways过程与方式

StepIRevision

Checkthehomework.Pointoutthecommonerrorsstudentshavemade.

StepIIAwareness

AskstudentstoreadthethreedisastersonPage17.Thentheywilldiscussingroups.Eachmemberwillspeakoutwhattheyknowabouttheworstdisasters.Aftertheydiscusswhattheworstdisastersinhistoryareingroups，eachofthemwillwritewhatheorsheknowsonboard.Thewholeclasswillexchangetheirinformation.IfstudentshaveanaccesstotheInternet，theymayfindwhattheyneedeasily.Iftheydon’t，Teachermayprovidesome.

Tangshan:

TheDeadliestEarthquake

At3:

42a.m.onJuly28，1976，amagnitude7.8earthquakehitthesleepingcityofTangshan，innortheasternChina.Theverylargeearthquake，strikinganareawhereitwastotallyunexpected，obliteratedthecityofTangshanandkilledover240，000people—makingitthedeadliestearthquakeofthetwentiethcentury.

Whatwasthebiggestearthquakeever？

Thebiggestearthquakeknowninhistoricaltimesoccurredon22May1960inChile，withamagnitudeMwof9.5.ItoccurredbecauseofaruptureintheEarth'

scrustthatextendedhorizontallyabout1000kmalongthecoastofSouthAmerica；

insomeplacesthisquakecausedverticalupliftsaslargeassixmeters.Thesecondbiggestearthquakeknown，withamagnitudeof9.2，occurredinAlaskaon27March1964；

ithadarupturelengthof800km，andcausedasmuchas11metersofuplift.

TheoreticalcalculationssuggestthattheseearthquakesarejustaboutaslargeaspossibleforplanetEarth.Supposeahypotheticalearthquakerupturestheentire100kmthicknessoftherigidtectonicplates，andsupposethisruptureextendsalongafaultwithlength1000kmwithanaverageslipof10meters.Calculationsshowthatthishypotheticalearthquakewouldhaveamagnitudeofabout9.3.Largerearthquakeswouldhavetoruptureanevenlongerfaultwithanevengreateraverageslip；

apparentlythisjustdoesn'

thappen.

Whatwasthemostdeadlyearthquakeever？

The27July1976earthquakeinTangshan，China（MS=7.9）causedthegreatestnumberofdeathsofanyrecentquakeknown；

themostreliableestimatesarethatabout242，000liveswerelost.Tangshanhadapre-quakepopulationofaboutamillionpeople；

themainindustryismining.OnereasonthedeathtollwassohighisbecausemostofthestructuresinTangshanweremultiple-story，unreinforcedbrickandconcretebuildings.

Estimatesoflossoflifefromtheworstearthquakedisastersareveryunreliable；

understandably，whentensofthousandsofpeoplearedeadandmostbuildingsareinruins，therearemoreimportantthingstodothantocountbodies.However，therehavebeenaboutfivequakesinthetwentiethcenturywherereportsofliveslostexceeded100，000.MostexpertsacceptthatthemostdeadlyearthquakeinhistoricaltimesoccurredinShanxiProvince，Chinain1556；

about830，000liveswerelost.

StepIIIUnitDiary

Getstudentstoassesstheirlearningovertheunit.BycompletingUnitDiarystudentswilllearnwhattheirdifficultyisandwhattheyshoulddotoimprove.

StepIVHomework

PostyourviewonhowtoEnglishwellontheBulletinBoard.

附件

I.本单元课文注释与疑难解析

1.Inthelastfewdecades，scientistshavereachedconsensusandreportedthathumanbeingsarecausingchangesintheEarth’sclimate—somethingpreviouslyseenasbeyondourcontrol.

在过去几十年里，科学家一致认为，人类一直在影响地球气候的变化，——这是一种原来被认为是人类所不能控制的现象。

consensus:

n.ageneralagreementamongthemembersofagivengrouporcommunity一致，合意，交感

consensuspolitics代表多数人意见的政纲；

consensusmanagement代表民意的管理

Thereisbroadconsensus（ofopinion）inthecountryonthisissue.对这一问题举国上下（舆论）普遍一致.

Thetwopartieshavereachedaconsensus.这两个政党达成了一致意见。

“beyond+名词”结构，“出乎……胜过……、范围、限度”。

常见的有：

beyondbelief（令人难以置信），beyondone’sreach（鞭长莫及），beyondone’scontrol（无法控制），beyondourhope（始料不及）

Theresultshavegonebeyondourhopes.结果超出了我们的期望。

2.Lookingahead，scientistsbelievethatglobalwarmingcouldbeoneofthebiggestenvironmentalproblemsfacingthe21stcentury.展望未来，科学家们相信，全球变暖可能是21世纪面对的最大的环境问题之一。

lookingahead是现在分词短语，在句中做状语。

lookahead:

往前看；

考虑未来

Lookahead！

Whatcanyouseeonthetopofthehill？

向前看！

你看见山顶上有什么东西？

Ilookahead，andbeforemeri