高中英語-how life began on the earth教學(xué)課件設(shè)計

Unit4ReadingHowLifeBeganontheEarththeory理論atom原子globe地球，球狀violent猛烈的carbondioxide二氧化碳nitrogen 氮vapo(u)r水蒸氣atmosphere大氣層fundamental基礎(chǔ)的acid酸的chain鏈子，鎖鏈multiply增加繁殖oxygen氧氣shellfish水生有殼動物

amphibian

兩棲動物reptile爬行動物mammals哺乳動物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很多科學(xué)家相信，由于地球上長期有水存在，使地球得益把有害氣體和酸性物質(zhì)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