高中英语-how life began on the earth教学课件设计

Unit4ReadingHowLifeBeganontheEarththeory理论atom原子globe地球，球状violent猛烈的carbondioxide二氧化碳nitrogen 氮vapo(u)r水蒸气atmosphere大气层fundamental基础的acid酸的chain链子，锁链multiply增加繁殖oxygen氧气shellfish水生有壳动物

amphibian

两栖动物reptile爬行动物mammals哺乳动物thus因此Wordsforthetext

Fastreading

MatchthemainideaofeachparagraphParagraph1:Paragraph2:Paragraph3:Paragraph4:TheimportanceofwaterforlifeThedevelopmentofplantsandanimalsontheearthTheformationoftheearthAtheoryaboutthebeginningoftheuniversee.ThearrivalofhumansandtheirimpactontheearthParagraph5:Para1:HowtheuniversebeganThere’sthewidelyacceptedtheoryBigBangthrewmatterinalldirectionsatomsformedandcombinedtocreatestarsandotherbodies.

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reading

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readingTimeTheearthSeveralbillionyearsafterthe“BigBang”Between4.5and3.8billionyears

agoAcloudofdustAsolidglobeExplodedloudlywithfireandrockWaterbegantoappearProduceC/Nwatervapor,etc.

Para2:ThedevelopmentoftheearthAstheearthcooleddownWhywastheearthdifferentfromotherplanets?AItproducedalotofheat.B.Thewaterremained.CWaterdisappeared.D.Itwastheoldestplanet.Whywaslifeabletodevelopontheearthbutnotonotherplanets?ATheearthhadasolidshape.B.TheearthdidnothaveharmfulgasesCThewaterstayedontheearthbutnotonotherplanets.D.Theearthwasnottoohotandnottoocold.

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readingPara3:Para3:PleasetranslatethesentenceintoChinese.

Whatmanyscientistsbelieveisthatthecontinuedpresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.

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reading很多科学家相信，由于地球上长期有水存在，使地球得益把有害气体和酸性物质溶解在海洋里。（）ALandanimals,insectsandamphibiansappeared.（）BDinosaursappeared.（）CSmallplantsgrewonthewater.（）DReptilesappeared.（）EPlantsbegantogrowondryland.（）FShellfishandotherfishappeared.（）GMammalsappeared.521436Puttheorderofdevelopmentoflifeintoatimeline.

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reading7Para4:Puttheorderofdevelopmentoflifeintoatimeline.Thedevelopmentofplantsandanimalsontheearthwaterplantsshellfishlandplantsinsectsamphibianreptiledinosaurmammals

Para5:

1.Whoarethesmallcleveranimalswithhandsandfeet?

2.Aretheytakinggoodcareoftheearth?Why?

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readingHumanbeing

No.Becausetheyareputtingtoomuchcarbondioxideintotheatmosphere.GreenhouseeffectTheproblemhumancaused?puttingcarbondioxideintotheatmosphereTheearthisbecominghotterandhotter!Whereshallwegotomorrow?

Pleasereviewthetextfullybylisteningtotherecord.

ListeningAfterthe“bigbang”,theearthwasstilljustacloudof_______,it_______loudlywithfireandrock,whichwere_____toproducethe_________,watervapourandothergases.Then________begantoappearedontheearth.dustexplodedintimecarbonwaterSummary____________inwaterareconsidered

tobetheearliestlivesontheearth.TheO2

theysuppliedencouragedthelivesof____

__________.Slowlygreenplantsgrewon

land,whichwerefollowedby__________

likeinsects&________.Whentheplantsgrewinto______,______appeared.Then_______developedbutdisappearedlater,whichmadetheriseofatotallydifferentanimal,______,possible,andfinally_____spreadallovertheworld.shell--fishandfishamphibiansforestsreptilesdinosaursmammalhumansThesmallplantslandanimalsWearemakingtheworldbetter.Wearemakingtheworldworse.ABDiscussion

developednewmethodsofgrowingfoodWhathumansdeveloped?developednewmethodsofhuntingdevelopednewmethodsofmovingaroundLet’ssolarenergypl