八年级英语下册unit7knowourworldlesson38theworldisabigplace课件（新版）冀教版

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1、Unit7KnowOurWorldLesson38TheWorldIsaBigPlaceThinkaboutit!•Howmanycontinentsarethereintheworld?Whatarethey?•Whatdoyouknowabouttheplacewhereyoulive?Howmanycontinentsarethereintheworld?Whatarethey?AfricaAsiaEuropeOceaniaAntarcticaSevenContinentsNorthAmericaSouth

2、AmericaThePacificOceanTheIndianOceanTheAtlanticOceanTheArcticOceanOceanscoveraboutthree-quartersoftheearth’ssurface.desertDesertscovertwentypercentoftheearth’ssurface.What’stheworld’sbiggestisland?Theworld’sbiggestislandisGreenland.GreenlandisnortheastofCanad

3、a.GreenlandWords&expressionsListenandread.Theearthisaveryspecialplanet,anditfacesabigproblem.Intheyear2010,theworld’spopulationwasover7billionintotal.Itisincreasingveryquickly.By2025,theworldmayhaveabout8billionpeople.Andby2050,theworld’spopulationmayreach9bi

4、llion.Thereisanotherproblem.Peoplecan’tliveeverywhereontheearth.Wecan’tliveinwater,andonlyaboutonethirdofourplanetisland.Butpartsofthislandareverydry.Thesedryplacesarecalleddeserts.Someareashaveveryhighmountains.Othershavealotofsnowandice.Itisnoteasytoliveint

5、hoseplaces.Therearesevencontinents:Asia,Africa,Australia,Antarctica,Europe,NorthAmericaandSouthAmerica.Antarcticaiscoveredwithsnowandiceallyearround.Luckily,peoplecanliveontheothersixcontinents.Onthesecontinents,therearegreenforests,freshwaterandrichlands.Oce

6、anscovertwothirdsoftheearth’ssurface.Theearthhasonlyonebigocean,butweusethesenamesforitsdifferentparts:thePacificOcean,theIndianOcean,theAtlanticOceanandtheArcticOcean.ThePacificOceanisthelargestone.Theearthisourhomenow,anditwillbeourhomeinthefuture.Itmustbet

7、reatedwellforourchildrenandforourchildren’schildren,too!Languagepoints