高中英语人教版必修3Unit 4 Astronomythe science of the stars教学设计Word格式文档下载.docx
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高中英语人教版必修3Unit 4 Astronomythe science of the stars教学设计Word格式文档下载.docx
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Satellitesareobjectsthatmoveinorbitaroundotherobjectsofgreatermass.Asatellitemaybenatural,likethemoon,orartificial,likeaspacecraft.
Oursolarsystemismadeupofthesunandtheobjectsthatorbitit.Theseincludetheeightplanets(andprobablymorethaneight)andtheirmoons,aswellasasteroids,comets,andmeteors.
Someexamplesofthecreationstories.
1ThestoryofHopipeople:
TheFourCreations.
2FromChina:
ThestoryofPanGu
3TheJewish/Christian/Muslimstory
IsaacNewton
AlbertEinstein
StephenHawking
Idea
Largebodieshaveaforcewhichpullsthingstowardsthem.
Inspacelargeobjectsmakespaceandtimebend;
Thelargertheobjectis,thefurtherspaceandtimebend.
Blackholeshaveaverylargemassandpullthingstowardsthem.
Development
Thebiggertheobjectis,thestrongerthegravity.
Timegoesslowerinverystronggravity.
Ifyougoovertheedge,youcannotgetout;
butifyoudonot,youmaybeabletoescape.
Instructions(提示):
Pleasepayattentionto….
Pleasecheckthat….
Pleaselookat…..
Makesurethat….
Don`tforgetthat…..
Watchoutfor….
Youneed….
Youhadbetter…..
Thefirstperiod:
WarmingupandReading
Importantpoints:
letthestudentsreadthepassageandlearnaboutthedevelopmentoftheearthbyusingdifferentreadingskillstounderstandimpliedmeaningoftheauthor.
Difficultpoints:
enablethestudentstounderstandthepassageandknowthedevelopmentoftheearthbyusingdifferentreadingskills.
Knowledgeaims:
learntheusefulnewwordsandexpressionsinthispart:
astronomy,,system,religion,theory,atom,billion,globe,violent,carbon,atmosphere,unlike,fundamental,armful,acid,chain,multiply,oxygen,exist,dioxide,puzzle,solarsystem,intime,layeggs,givebirthto,inone`sturn,carbondioxide,prevent….from
Step1Presentation
1.Haveafreetalkwithstudentsbylettingthembrainstormthefollowingquestions:
Whoareourancestors?
Doyouknowwhatitwaslikebeforelifeappearedontheearth?
Doyouknowhowlifebeganontheearth?
Doyouwanttogetmoreinformation?
2.Tellthem:
todaywewilllearnsomethingabouthowlifebeganontheearth.Turntopage25.let`scometoWarmingup.
Step2Warmingup
1.Inoursolarsystemeightplanetscirclearoundthesun.Theyare:
Uranus天王星,Venus金星,Earth地球,Mars火星,Mercury水星,Jupiter木星,Neptune海王星,Saturn土星.
2.Whatinterestsyouinastronomy?
Doyouknowanyquestionsthatastronomersareinterestedin?
Step3Pre-reading
1.Firstgetstudentstodiscussthequestionswiththeirpartners:
Theoriginoflifeonearthisaquestionthatinterestsastronomers.Doyouknowaboutit?
Eachreligionandculturehasitsownideaabouthowlifebeganonearth.Whatdoyouknowaboutthem?
2.Getthemtotelltheirstories.Encouragethemtotelldifferentstories.
3.Getthemreadthetitleandpredictwhatthereadingwillbeabout.
Step4Reading
1.Fastreading:
getthemreadthepassagequicklyandthenwritedownthemainideaforeachparagraphandthewholepassageinthefollowingchart.
Howlifebeganontheearth
Paragraph1
Awidelyacceptedtheoryabouttheformationoftheuniverse.
Paragraph2
Theformationoftheearth.
Paragraph3
TheImportanceofwaterforlife.
Paragraph4
Thedevelopmentofplantsandanimalsontheearth.
Paragraph5
Thearrivalofhumansandtheirimpactontheearth.
Thepassage
Abriefintroductiononhowtheuniversedevelopedandhowlifebeganontheearth.Itprovidesascientificbackgroundtoanyinvestigationintospaceanditisfactual.
2.Intensivereading:
allowthemseveralminutetoreadandgettheimportantdetails,thenfinishthefollowing.
Time
Events
Between4.5and3.8billionyearsago
Thedustsettledintoasolidglobe,whichwastheearth.
Theearthexplodedwithfireandrock.Theywereintimetoproducecarbon,nitrogen,watervaporandothergases,whichweretomaketheearth`satmosphere.Whentheearthcooleddown,waterappeared.WateralsoappearedonotherplanetslikeMarsbutunliketheearth,ithaddisappearedlater.
Manymillionsofyearslater
Smallplants-begantoappearonthesurfaceofthewater.Theymultipliedandfilledtheoceansandseaswithoxygen.
Nextandlater
Plants
Greenplantsbegantogrowonland,whichwerefollowedbylandanimals.
Animals
Reptilesappearedandtheyproducetheyoungbylayingeggsandexistedontheearth.
Mammalsappearedontheearthwhichgavebirthtoyoungbabyanimalsandfedthemonmilk.
About2.6millionyearsago
Smallcleveranimalswithhandsandfeetappeared.Theyspreadallovertheearth.Thusthey,intheirturn,becamethemostimportantanimalsontheplanet.
3.Puttheorderofdevelopmentoflifeintoatime-line.
1).Insectsandamphibiansappeared.(H)
2).Dinosaursappeared.(J)
3).Theearthbecameasolidball.(C)
4).Smallplantsgrewonthewater.(E)
5).Reptilesappeared.(I)
6).Plantsbegantogrowondrydust.(G)
7).Waterappearedontheearth.(B)
8).Shellfishandotherfishappeared.(D)
9).Theuniversebeganwitha“BigBang”.(F)
10).Cleveranimalswithhandsandfeetappeared.(A)
11).Mammalsappeared.(L)
12).Theearthwasacloudofdust.(K)
4.Choosethebestanswerstothequestions:
1).Whatisimportantforthebeginningoflife?
A.Thewaterontheearth.B.Theearth`satmosphere.
C.Theformofforests.D.Dissolvingharmfulgases.
2).Whichofthefollowingappearedontheearthfirst?
A.InsectsB.ReptilesC.AmphibiansD.Shellfishandfish.
3.Whichofthefollowingstatementsistrue?
A.waterstillexistsonMars
B.theearth`satmosphereismadeupofoxygenandnitrogen
C.theearthhaddissolvedtheharmfulatmosphereintotheoceanandseas.
D.Plantsprovideoxygentotheearth.
4).Whatisthepassagemainlyabout?
A.Theappearanceanddevelopmentoflifeontheearth.
B.Thebirthoftheearth.
C.Whydinosaursdiedout.
D.Thefactthathumanbeingcausedbeginsglobalwarming.
4.Readinganddiscussion:
1).Whywastheearthdifferentfromtheotherplanets?
(Becausethewaterremainedontheearth.)
2).Whydidtheplantsgrowbeforetheanimalscame?
(Becauseplantsprovideoxygenforanimalstobreathe.)
3).Whyisitwrongtoshowfilmswithdinosaursandpeopletogether?
(Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.)
4).Whatproblemiscausedbyhumanbeings?
(Humanbeingscausedglobalwarming.)
5.Explanations:
discussthefollowingimportantsentencesandphrases.
1).Whatiswastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintosolidglobe.
2).Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.
3).Theywereintimetoproducecarbon,nitrogen,watervaporandothergases,whichweretomaketheearth`satmosphere.
4).Sowhetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.
Suggestedanswers:
6.Readingaloudandunderstanding:
askthemtoreadthepassagealoudtothetapeandletthempayattentiontothepronunciationofeachnewwordsandthepausewithineachsentenceandpickouttheusefulexpressionsandcollocations.
Ontheearth,accordingto,acloudofdust,so…that,whether…ornot,intime,watervapor,cooldown,onone`ssurface,allow…todosth.achainreaction,millionsof,onthesurfaceof,beableto,aswellas,bydoing….Layeggs,bedifferentfrom,givebirthto,spreadallovertheearth,inone`sturn,prevent…from,asaresultof,too…to,depend…on
7.填空
Exist,live,prevent….from,protect…from,multiply,develop,climate,weather
Onehundredandfortymillionyearsbeforehumansexisted,dinosaursruledtheearth.Theylivedforsolongontheearththattheydevelopedintomanydifferentspecies.Theyhadfewnaturalenemiesbesideseachother,s
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