2025年春冀教版八年级下册教学课件 U 7 Lesson 38 The World Is a Big Place

Unit7KnowOurWorldLesson38TheWorldIsaBigPlace1

学习目标2

新课导入3

新课讲解

4

当堂小练5

课堂小结目录contentsLearnmoreabouttheworld’sgeography.MasterthewordsandexpressionsofthecontinentsandoceansinEnglish.学习目标思考Allofushavestudiedgeography.Canyousaythenamesofthecontinentsandoceansintheworld?新课导入THINKABOUTIT·Howmanycontinentsarethereintheworld?Whatarethey?·Whatdoyouknowabouttheplacewhereyoulive?新课讲解Howmanycontinentsandoceansdoestheworldhave?Canyoupointthemout?Theearthisaveryspecialplanet,anditfacesabigproblem.Intheyear2010,theworld’spopulationwasover7billionintotal.Itisincreasingveryquickly.By2025,theworldmayhaveabout8billionpeople.Andby2050,theworld’spopulationmayreach9billion.Thereisanotherproblem.Peoplecan’tliveeverywhereontheearth.Wecan’tliveinwater,andonlyaboutonethirdofourplanetisland.Butpartsofthislandareverydry.Thesedryplacesarecalleddeserts.Someareashaveveryhighmountains.Othershavealotofsnowandice.Itisnoteasytoliveinthoseplaces.Therearesevencontinents:Asia,Africa,Australia,Antarctica,Europe,NorthAmericaandSouthAmerica.Antarcticaiscoveredwithsnowandiceallyearround.Luckily,peoplecanliveontheothersixcontinents.Onthesecontinents,therearegreenforests,freshwaterandrichlands.Oceanscovertwothirdsoftheearth'ssurface.Theearthhasonlyonebigocean,butweusethesenamesforitsdifferentparts:thePacificOcean,theIndianOcean,theAtlanticOceanandtheArcticOcean.ThePacificOceanisthelargestone.Theearthisourhomenow,anditwillbeourhomeinthefuture.Itmustbetreatedwellforourchildrenandforourchildren'schildren,too！Languagepoint1Theearthisaveryspecialplanet,anditfacesabigproblem.planet/plænɪt/n.

行星planet为可数名词，指环绕恒星运转的星球。e.g.Theearthistheonlyplanetthatweknowhaslifeatpresent.地球是目前我们所知的唯一有生命存在的行星。Languagepoint2Intheyear2010,theworld’spopulationwasover7billionintotal.billion/bɪlɪən/n．十亿；千兆billion前有数词修饰时，billion不能用复数形式。e.g.Wewanttwobillion.我们想要20亿。billionsof意为“数十亿的”，表示不确定的数量。e.g.Therearebillionsofstarsinthesky.天上有数十亿的星星。Languagepoint3Itisincreasingveryquickly.increase既可作及物动词也可作不及物动词，其反义词为decrease。也可作名词，常用短语ontheincrease“正在增加；不断增长”。e.g.Thesecasesareontheincrease.这些案件在不断增加。e.g.Hispowerincreased.他的权利加强了。increase/ɪn'kriːs/v.增加；增大Languagepoint4Antarcticaiscoveredwithsnowandiceallyearround.主动结构为：cover...with...(用……盖住……)e.g.Pleasecoverthisdeskwithacloth.请用布盖住这张课桌。becoveredwith

被……覆盖e.g.Ourgardeniscoveredwithgrassandflowers.我们的花园被花草覆盖着。1Readthelessonandmatcheachparagraphwithitsmainidea.Let'sDoIt!Paragraph1

a.Sixofthesevencontinentsaregoodforpeopletoliveon.Paragraph2b.Weshouldtreattheearthwell.Paragraph3c.Anincreasingpopulationisabigproblemfortheearth.Paragraph4d.Twothirdsoftheearthiscoveredwithoceans.Paragraph5e.Peoplecannotliveeverywhereontheearth.Fillintheblankswiththecorrectformsofthewordsinthebox.increasedrysurfacebilliontotal1．Thenumberofswimmershereis__________quicklybecauseit’sveryhotthesedays.2．Theschoolhasa________of900students.3．Ithinkitmaybethe________seasonoftheyear.4．The________ofourbodyisskin.Itprotectsus.5．Howmany________ofpeoplearethereintheworldnow?increasingtotal

driestsurfacebillions2一、词语运用1.Thes________ofthelakeisquitestill.2.Thet________costwillbe130dollars.3.Theearthisap________anditgoesaroundthesun.4.TheycomefromIndia,andtheyareI________.5.Thenumberofwildpandashasi________byaround17%inthelasttenyears.urfaceotallanetndiansncreased当堂小练二、连词成句1.planet,earth,is,special,the,a__________________________________________________.2.in,we,live,water,can't__________________________________________________.TheearthisaspecialplanetWecan'tliveinwater3.deserts,dry,called,these,places,are__________________________________________________.4.must,earth,well,the,treated,be__________________________________________________.5.cover,surface,thirds,the,oceans,two,earth's,of__________________________________________________.ThesedryplacesarecalleddesertsTheearthmustbetreatedwellOceanscovertwothirdsoftheearth'ssurface重点单词：increase