初二英语下外研版M3JourneytospaceUnit2wehavenotfoundlifeonanyotherplanetsyet.教案.docx

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1、M3JourneytospaceUnit2wehavenotfoundlifeonanyotherplanetsyet.Pre-reading:revisionofu1:Doyourememberthelatestnewsinunit1?While-readingScientiststhinkthattherehasbeenlifeontheearthforhundredsofmillionsofyears.However,wehavenotfoundlifeonanyotherplanetsyet.Theearthisaplanetanditgoesaround

2、thesun.Sevenotherplanetsalsogoaroundthesun,Noneofthemhasanenvironmentlikethatoftheearth,soscientistsdonotthinktheywillfindlifeonthem.Thesunanditsplanetsarecalledthesolarsystem,andoursolarsystemisasmallpartofamuchlargergroupofstarsandplanets,calledtheGalaxyortheMilkyWay.Therearebillion

3、sofstarsintheGalaxy,andoursunisonlyoneofthem.Scientistshavealsodiscoveredmanyothergalaxiesintheuniverse.Theyareveryfarawayandtheirlighthastotravelmanyyearstoreachus.Sohowlargeistheuniverse?Itisimpossibletoimagine.ScientistshavesentspaceshipstotheplanetMarstotakephotos.Theyhaveevensent

4、spaceshipstotraveloutsidethesolarsystem.However,nospaceshiphastravelledfarenoughtoreachotherstarsinourGalaxy.Scientistshavealwaysaskedthequestions:withsomanystarsintheuniverse,arewealone,oristherelifeoutthereinspace?Havetherebeenvisitorstotheearthfromotherplanets?Whyhasnoonecommunicat

5、edwithus?Wdonotknowtheanswer⋯yet.Readanddrawamindmapabouttheuniverse？Inwhichparagraph？Themainideaandthequestionaboutparp.2:Whyisn’tanylifeonethotherplanets?Themainideaandthequestionaboutparp.3:Wherearetheothergalaxies?Themainideaandthequestionaboutparp.4:Wherehavethescientistssentspac

6、eshipsto?Themainideaofparp.1:Themainideaandthequestionaboutparp.5:Whatquestionshavetheyasked?Whatdoesthelastsentencemean?Especiallythe“⋯”.Getthemainideaofthepassage,choosethebestanswer1.Anyoneoutthere?2.LifeonEarth3.Thesunandotherstars4.ThestarsatnightReadingtimePost-reading:retell第1页

7、附太阳系八大行星名称:第2页