高中英语-Unit 4 Astronomy the science of the stars教学课件设计

Unit4

Astronomy:thesceinceofstarsBy:Quiz(2).RoughlyhowoldisEarth?

A.

6,000yearsB.4.54millionyearsC.4.54billionyears(3).IsEarththelargestplanetinourSolar

System?

Yes/No(1).What'sEarth'strueshape?

A.Sphere(球体)B.FlatC.Oblatespheroid(扁球形体)

(4).IstheEarththeonlyplanetinourSolarSystemwithliquidwater?

Yes/No

(5).Earth'satmosphereismostly_______?

Oxygen(氧气)orNitrogen(氮气)(6).TheoceanscoverwhatpercentageoftheEarth?

70%or50%theearthmysteriesHowdidtheearthcomeintobeing?PanguGodscientifictheorybeliefsorreligionsHowlifebeganontheearthStep2Fastreading1.Skimoverthetextandworkout:Par.1

Theformation(形成)ofthe_________..Par.2Theformationofthe_________.Par.3Thepresenceof_______

anditsimportanceforlifeontheearth.Par.4Thedevelopmentof________and_________.Par.5______________andtheireffectsontheearth.Read

silentlyandquicklyforkeyinformation3’universeearthwaterplantsanimalsHumanbeingsPartIBasisforlifePartIIlifeacloudofdustatmosphere/airdissolve___________and________intotheoceansandseasmakingitpossiblefor___todevelopexplodefire/rockmatteratomsStep3DetailedreadingReadPartI(par.1topar.3)Thedevelopmentoftheearth(Thebasisforlife)1.Workoutthefollowingchart.4’Step3DetailedreadingmatteratomsBigBangacloudofdust1.Workoutthefollowingchart.atmasphereexplodefire/rocksatmospheresolidglobecarbonnitrogenwatervapourothergasescooldown

dissolve________________and_______intotheoceansandseasmakingitpossiblefor_____todevelop

harmfulgasesacidslifewaterBigBangacloudofdustatmospheresolidglobeexplodewaterReadPartII(par.4topar.5):Thedevelopmentoflife

2.Putthefollowingeventsinorder(Thetime-lineoflifeontheearth).3.Thinkabouttherelationshipsbetweenplantsandanimalsandfillinthechart?6’Step3DetailedreadingStep3Detailedreading2.Putthefollowingeventsinorder

Waterappearedontheearth.1.

6.

7.

8.

9.

Cleveranimalswithhandsandfeetappeared.

Mammalsappeared.Plantsbegantogrowondryland.Smallplantsgrewonthewater.Dinosaursappeared.Shellfishandotherfishappeared.Reptilesappeared.Insectsandamphibiansappeared.5.

3.

2.

4.

humanbeingsStep3Detailedreading3.relationshipsbetweenplantsandanimalssmallplantsinwatershellfishallsortsoffishinsectsamphibiansreptilesdinosaursmammalsplantsonlandforestshumanbeingsthecleverestanimals——humanbeingsforlifedevelopmetontheearthwaterplantsforestsStep4GroupWork:DiscussionWorkingingroups,discussthefollowingquestions

(youranswersarenotnecessarilylimitedtothetext.Useyourknowledgeandimagination.Youcanwrriteordrawpictures):

1.Whyiswaterimportantforthedevelopmentoflifeontheearth?2.Whatroledoyouthinkplants(waterplants,landplantsandevenforests)playinthedevelopmentoflife?3.Whataretheproblems(causedbyhumanbeings)thatlifeontheearthisfacing?Why?Andhowdoyouthinkwecansolvetheproblems?7minsSummaryTheuniversebeganwitha_______.Thentheearthbecomea________,whichexplodedwith________,whichintimetoproducetheearth's___________.Astheearthcooleddown,_____begantoappear,whichdissolve____________and_____intotheoceansandseas.bigbangsolidglobefireandrocksatmospherewaterharmfulgasesacids____________onwatersurfacefilledtheoeanwithoxygen,encouraginglifeas________and_________.__________onlandwerefollowedby________and__________.Whenpantsgrewintoforests,_______appeared,followedby________,________,andfinally__________,whocausedaseriousproblemtotheearth.Whethertheproblemcanbesolvedmattersalotfortheearthinyearstocome.SummarySmallplantsshellfishallsortsoffishGreenplantsinsectsreptilesamphibiansdinosaursmammalshumanbeingsbigbangacouldofdustasolidglobeexplodewithfireandrockatmosphereplantsonwatersurfacewaterSummaryshellfishandfishesplantsonlandinsectsamphibiansforestsreptilesdinosaurshumanbeingsmamalsSummarySummaryWehaveonlyoneEARTH!Assignment(Homework):Howlifebeganontheearthisoneofthebiggestpuzzlesthatscientistsfoundhardtosolve.Whatotherpuzzlesarehiddeninthepassage?Ingroups,findthemoutanddosomeresearch.Theneachgroupshouldpresentareportofyourresearch.(Tryusingasmanywordsandexpressionsaspossiblethatwelearnedtoday.)Thankyouforyourattentionandcooperation!Step4GroupWork:Discussion

1.Whyiswaterimportantforthedevelopmentoflifeontheearth?Dissolveharmfulgasesandacid,allowwaterplantstogrow,whichfillwaterandatmospherewithoxygenStep4GroupWork:Discussion2.Whatroledoyouthinkplants(waterplants,landplantsandevenforests)playinthedevelopmentoflife?Food,foodchain,livingenvironment,oxygen,materialsforlifeStep4GroupWork:Discussion3.Whatistheproblem(caused