人教新课标必修三 Unit 4 Astronomy-Reading[阅读课件].ppt

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1、Unit4Astronomy:thescienceofthestarsastronomerHowlifebeganontheearth?进化(MTV).flvQuizonearthlife.1Doyouknowwhichoneisnotamammal哺乳动物?2Snakesandtortoisesbelongto_____,whilefrogsandtoadsbelongto__.Aamphibians两栖动物Breptiles爬行动物AkoalaWaterAirLife?3HowLifeBeg

2、anontheEarth：Whichcamefirst?HowLifeBeganontheEarthReading.mp3Paragraph1:Paragraph2:Paragraph3:Paragraph4:Paragraph5:AwidelyacceptedtheoryabouttheformationoftheuniverseTheformationoftheearthTheimportanceofwaterforlifeThedevelopmentofplantsandanimalson

3、theearthThearrivalofhumansandtheirimpactontheearthMatchthemainideaofeachparagraph.FastreadingTrueorfalse1.Accordingtoawidelyacceptedtheory,theuniversebeganwitha“BigBang”,afterwhichtheearthwasstillacloudofdustforseveralbillionyears.2.Astheearthcooledd

4、own,waterbegantoappearonitssurface.3.Waterallowedtheearthtodissolveharmfulgasesandacids,anditonlyappearedontheearth.4.Asformammals,theyproducedyounggenerallybylayingeggs.5.Cleveranimalswithhandsandfeet,intheirturn,areprotectingtheearthwellinsteadofot

5、herlessimportantanimals.DetailedreadingCompetition!NewsconferencePlace：Newsconference记者招待会Event：TenastronomersanswerquestionsTopic：HowlifebeganontheearthRules:1.GirlgroupandBoygroup2.Fivestudentsofeachgroupcometothefronttocompeteforansweringquestions

6、madebythereststudents.Scores:FivescoreseachtimeNotice:Whowinswillgetgifts!Gift1Gift21WhathappenedafterBigBang?2Whathappenedbetween4.5and3.8billionyearsago?3Whatweretomaketheearth’satmosphere?Whywaterwasimportantformakingitpossibleforlifetodevelop?Did

7、plantsappearfirstoranimalscomefirst?Andwhy?Whichturnedupfirst:reptiles,mammalsoramphibians?7What’sthedifferencebetweenmammalsandreptiles?8Didairappearearlierthanwaterandlife?9Whatarehumanbeingsdoingatpresent?Referencequestions:Gift1Gift2Gift1Gift2Che

8、erup!Allofyouhavedoneagoodjob!Weallknowourearthischangingworseandworse,thenwhatshouldwedotoprotectit?Nowlet’sshareMichaelJackson’sfeelingstowardthisproblem!EarthsongExtensionWriteacompositionaboutprotectingourearth.Thanksforyourlistening!Astronomyist