高中英语人教版必修3Unit4Astronomythescienceofthestarsperiod1教案1

Unit4Astronomy:thescienceofthestarsWarmingup&ReadingTextbookEdition:NSECBook3Sections:ModuleⅠUnit4Astronomy:thescienceofthestarsTopic:HowLifeBeganOnTheEarthTeachingMaterialsAnalysis教学分析Thislessonismainlyareadingskillstrainingclass.Howlifebeganontheearth,isthepassagefromStudent’sBook3Unit4,isconcernedwithastronomyandhowhumanbeingsfirstevolvedontheearthandunderstandtheuniversearoundthem.ThislessonisthefirstpartofUnit4.Focusingonthetopicoftheunit,astronomy,studentsaretrainedtolearntheknowledgeaboutastronomyandthelanguageusedtodescribethedevelopmentoflifethroughspeakingandreadingactivities.Mostimportantly,studentsaresupposedtomandtheeffectivewayofreadingaexpositorywritingwrittenintheorderoftimeandgettrainedtoimprovetheirreadingability,likeskimming,summarizingthemainideaofthepassage,guessingthemeaningofnewwordsinthecontextandsoon.Teachinggoals教学目标1).Targetlanguage目标语言a.Wordsandexpressions:astronomy,theory,atom,billion,globe,violent,carbon,atmosphere,fundamental,harmful,acid,multiply,oxygen,exist,prevent…from,blockout,cheerup,nowthatb.Grammar:NounClausesasthesubjectWhatitwastobeewasamystery.(主语从句)Itwasnotclearwhetherthesolidshapewastolastornot.(主语从句)2).Abilitygoals能力目标a.EnableSstotalkaboutthescienceofthestars,thedevelopmentoflife.b.Enablestudentstoimprovetheirspeakingskillsandreadingability.3).Learningabilitygoals学能目标a.EnableSstolearnhowtotalkaboutthebeginningoflifeontheearth.b.FostertheSs’interestsofscienceandleadtheSstostudyscientifically.c.TraintheSs’creativityandexpandtheirimagination.Teachingimportantpoints教学重点1).Talkaboutthebeginningoflifeontheearth.2).Discusstheorderofdevelopmentoflife.Teachingdifficultpoints教学难点Understandthebeginningoflifeontheearth.Teachingmethods教学方法1).Taskbasedteachingandlearning2).Cooperativelearning3).Discussionandpractice4).Fastreading,scanningandcarefulreadingTeachingaids教具准备MultimediaandPowerPointTeachingprocedures&ways教学过程与方式Step1Leadin TalkaboutsciencesubjectsT:Goodmorning/afternoon,everyone.Whatclassdoyouhavetoday?S1:Maths,English,Chinese,physics,history,andgeology.T:Whatothersubjectsdoyouhaveinschool?S2:puter,chemistry,biology,music,PE,andpolitics.T:Whichisyourfavourite?Why?S3:Myfavouriteoneis…becauseit’sveryinteresting/exciting/instructive/…S4:Ilike…bestbecause…T:Whichonesaresciencesubjects?S5:Physics,chemistry,biology,geologyandmathematics.T:Allthesesubjectsplayanimportantroleinthestudyofscience.Whatsubjectsareusedtostudymedicine?Howaboutbiochemistry?Whataboutgeophysics?Whatsubjectsarepartofastronomy?S6：Mathematicsandphysics.T:Canyouunderstandthefollowingbinedsciencesubjects?→physics+mathematics=astronomy→geology+physics=geophysics（地球物理学）T:Whatdoesastronomydealwith?S7:Astronomyisthescientificstudyoftheuniverseandtheheavenbodies(suchasthesun,moon,andstars),gas,anddustwithinit.T:Whatdowecallpeoplewhostudyastronomy?S8:Astronomer.Step2WarmingupTalkaboutuniverseandsolarsystemT:Let’sfollowthisastronomertolearnaboutuniverse.Howdidtheuniverseeintobeing?S9:Afterthe“BigBang”,theuniversecameintobeing.T:Doyouknowthesolarsystemintheuniverse?Whatisitmadeupof?S10:Thesolarsystemcontainseightplanetsandmanyetsandotherobjects.(Note：Accordingtothepresentdayscientificstudy,thereareonlyeightplanets,withthePlutoexcluded.WhytheplanetsremovethePluto?)T:Canyounametheeightplanets?S11:Mercury,Venus,Earth,Mars,Jupiter,Saturn,Uranus,andNeptune.T:Whichplanetdoweliveon?Canyoudescribewhatitlookslike?S12:Earth.Itsupportsavarietyoflifeand70%oftheearthiscoveredwithseasoroceans.T:Istherelifeonotherplanets?S13:Notyet.T:Right,thereisafamoussaying“Wateristheheadspringoflife”.Buthowdidthewaterappearontheearth?Ifyouwanttogetthecorrectanswer,pleasereadthepassageonP25.Itwilltellyou.Step3ReadingTask1:FastreadingFastreadingforthemainideaandthestructure1.

Askthestudentstonumbertheparagraphsandpayattentiontothefirstandthelastsentencesofeachparagraph.2.

Askthestudentstoreadthewholepassagequicklyandmatchthemainideaofeachparagraph.Para.1ThedevelopmentofplantsandanimalsPara.2

TheimportanceofwaterPara.3

TheformationoftheuniversePara.4

ThearrivalofhumanbeingsPara.5

TheformationoftheearthTask2:Scanning(Para1,2,3)thebeginningofwater&thebeginningoflifeMaketheSsreadparagraph1andanswerthefollowingquestions.Whatistheimportantevent(事件)totheearthbeforetheappearanceofwater?Whyiswaterimportantforthebeginningoflife?2.MaketheSsreadparagraphs23andfinishthefollowingchart.Acloudofdust→asolidball→presenceofwater→smallplantsgrowonthewater→shellfishandotherfishappear→plantsbegintogrowondryland→insectsandamphibiansappear→retilesappear→dinosaursappear→mammalsappearQ:Whywasitnecessaryforplantstogrowbeforeanimals?(Plantsprovidedoxygenforanimalstobreathe.)Task3:CarefulreadingReadthetextcarefullyanddiscussthesequestionsinpairs.Whytheearthwasdifferentfromtheotherplants?Whydidtheplantsgrowbeforetheanimalscame?Whydidanimalsfirstappearintheseanotontheland?Whatisthemaindifferencebetweenreptilesandmammals?Canyougivesomeexamplesofmammals?Task4:RetellthetextSupposeyouareDr.…whostudiesastronomy.Youareinvitedtogiveaspeechtotheschoolstudentsaboutthedevelopmentoflifeon“EarthDay”(April22nd).Goodmorning/afternoon.IamDr….Iamgreatlyhonoredtobeheretogiveyouaspeechaboutthedevelopmentoflife”.…Step4:CooperativelearningLettheSsreadparagraph4andthinkovertheproblemscausedbyhumanstotheearth.Activity1:DiscussingHowtoprotectourearthandmakeitabetterplacetoliveon?Earthishometousthelivingthings.Weoughttotakegoodcareofit.Dowehumanbeingslookaftertheearthwell?Whatproblemshavebeencausedbyhumanstotheearth?(air/water/earthpollution,globalwarming,desertification,endangeredwildlife…)Wemakeourhomeearthindanger.Ifwestillkeepdoingdamagetotheearth,wewillbehomelessoneday.Itistimew