高中英语-unit4 the science of the stars教学课件设计

Unit4Astronomy:thescienceofthestarsLearningaims

Knowledgeaims(知识目标)1.Understandingthegeneralideaofthetext2.RememberingkeywordsandphrasesAbilityaim(能力目标)TrainingandimprovingthereadingabilityMoralaim(情感目标)Knowingbasicknowledgeoftheoriginoflifeonearthandraisetheawarenessofprotectingourearth.

RevisionWords：1.n.学说;理论 2.n.原子3.n.万亿;十亿 4.n.地球仪;地球5.n.大气层;气氛 6.adj.基本(础)的7.adj.有害的 8.n.链子;连锁9.vt&vi.乘;增加 10.n.氧 11.vi.存在;生存 12.adv.因此;于是13.n.二氧化碳 Phrases：1.及时;终于 2.下蛋3.产生;分娩 4.轮到某人5.阻止;制止

theoryatombillionglobeatmospherefundamentalharmfulchainmultiplyoxygenexistintimelayeggsgivebirthtoinone’sturnprevent…fromthuscarbondioxide1111TheSolarSystem火星水星金星地球土星木星海王星天王星

oldstories

abouthowlifebeganontheearth?Nuwamadehumanbeingsfromclay(粘土).Panguseparatedtheskyfromtheearth...Doyouknowanideabasedonscientifictheory?ThehistoryoftheearthHowlifebeganontheearthReadingReadthepassagequicklyandsilently,thenanswerthefollowingquestion.SkimmingWhat’sthemainideaofthetext?

MainideaThetextmainlytellsushowtheuniverse___________andhowlife_________ontheearth.SkimmingdevelopedbeganScanningTask1Findoutthemainideaforeachparagraph.Task2Puttheorderofdevelopmentoflifeintoatimeline.mainidea

foreachparagraphPara1Para2Para3Para4Para5Howhumansappearedandtheirimpactontheearth.Waterisveryimportantforlifeontheearth.Howtheearthformed.Thedevelopmentofplantsandanimalsontheearth.Itiswidelyacceptedthatuniversebeganwitha“BigBang”.ScanningTask1Puttheorderofdevelopmentoflifeintoatimeline.

ScanningTask2a.Insectsandamphibiansappearedb.Dinosaursappearedc.Theearthbecameasolidballd.Smallplantsgrewonthewatere.Reptilesappearedf.Plantsbegantogrowondrylandg.Theearthwasacloudofdusth.Waterappearedontheearthi.Shellfishandotherfishappearedj.Theuniversebeganwitha“BigBang”k.Cleveranimalswithhandsandfeetappearedl.MammalsappearedMainidea

foreachparagraphPara1Para2Para3Para4Para5Howhumansappearedandtheirimpactontheearth.Waterisveryimportantforlifeontheearth.Howtheearthformed.Thedevelopmentofplantsandanimalsontheearth.Itiswidelyacceptedthatuniversebeganwitha“BigBang”.ScanningTask1Task2a.Insectsandamphibiansappearedb.Dinosaursappearedc.Theearthbecameasolidballd.Smallplantsgrewonthewatere.Reptilesappearedf.Plantsbegantogrowondrylandg.Theearthwasacloudofdusth.Waterappearedontheearthi.Shellfishandotherfishappearedj.Theuniversebeganwitha“BigBang”k.Cleveranimalswithhandsandfeetappearedl.MammalsappearedTherightorderis______________________________jgchdifaeblk

Enjoytwosentences1.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.主语从句表语从句更为重要的是,地球冷却了下来,地球的表面就出现了水。2.Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.形式主语主语从句水对生命的发展会起关键作用,这一点在当时并不明显。

Consolidation(当堂巩固)TheuniversebeganwithaBigBang._______begantoformandcombinetocreatestarsandotherbodies,buttheearthwasjustacloudofdust.Between4.5and3.8_______yearsagothedustsettledintoasolid______.Astheearthcooleddown,water,whichwastobe___________tothedevelopmentoflife,begantoappearonitssurface.Smallplantsgrewonthewater.They_________andfilledtheoceansandseaswith_________andthenshellfishandotherfishappeared.Greenplantsbegantogrowonlandandtheninsectsand__________appeared.Whentheplantsgrewintoforests,reptiles

whichproducedyoungby______eggs,appeared.65millionyearsagotheageofthedinosaursended,whichmade__________thatgave______toyoungbaby,riseontheearth.About26millionyearsagosomesmallcleveranimalswithhandsandfeet,appearedandspreadallovertheearth.AtomsbillionglobefundamentalmultipliedoxygenamphibianslayingmammalsbirthIthasbeenaverylongtimesincelifebeganontheearthandformillionsofyearstheearthisouronlyhome.UndertheDomeHerdocumentary(纪录片)

Groupworkwhatshouldwedotoprotectourearth?Forouronlyhome,wearewillingto…wemust…weshould…Let’sdothefollowingtogether:PlantmoretreesSaveenergy,suchaswater,electricity,paper…Don’tlitterSaynotodisposableitems(一次性物品)Leadalow-carbonlifeBeaBMW(Bus,Metro,Walk)……Doremembereverysmallthingmatters/counts.OneEarth,OneHomeHealtheworldMakeitabetterplaceForyouandformeandtheentirehumanraceHomeworkWriteashortcompositionaboutthetopiocHowtoprotectourearth?ThanksWhatwillhappenwhenweputtoomuchCO2intotheatmosphere?

greenhouseeffectglobalwarminganimalswilldieoutplantswilldieoutTherewillbenolife