外研版高中英语必修三 （The world of science）新课件(第2课时)

第2课时Unit3

Theworldofscience

1.Understandthemainideaofthepassageandgetsomedetailedinformation.2.Getthefeaturesofargumentationandfindoutthestructureofthepassage.3.Havetheabilityofwritingareportoftheexperimentaccordingtotheinstructionsfortheexperimentgiven.GoalsWarmupHomeworkcheckingFillintheblankswiththegivenwordsintheproperform.1.Thebridge___________(build)lastyear.

2.Greatchanges____________(take)placeinmyhometown.3.Sofar,manyvillages_______________(visit).4.Theparty__________________(plan)sincetheNewYear.5.Withthehelpofhightechnology,moreandmorenewsubstances________________(find)inthepastfewyears.6．Papermoney_____________(use)foroverathousandyears.7．Greatchangeshavetakenplaceinmyhometownandalotoffactories________________(set)up.8．Thisbook___________________(translate)intomanylanguagesuptonow.9．Thefirehasgottothefifthfloor.Iwonderwhetherallthepeople____________________(save)．10．—Wewanttositatthetablenearthewindow.—I'msorry，butit_________________(take)already.wasbuilthavetakenhavebeenvisitedhasbeenplannedhavebeenfoundhasbeenusedhavebeensethasbeentranslatedhavebeensavedhasbeentakenTalkaboutthisperson.BackgroundinformationBenjaminFranklin(1706–1790)wasoneoftheFoundingFathersoftheUnitedStatesandhelpeddrafttheDeclarationofIndependence.Apartfrombeingasuccessfulstatesman,hewasalsowellknownasaleadingAmericanauthor,printerandpublisher,successfuldiplomat,creativescientistandinventor.HighlightsinthelifeofBenjaminFranklin1.____________________________________2.____________________________________3.____________________________________4.____________________________________5.____________________________________6.____________________________________7.____________________________________8.____________________________________OneoftheFoundingFathersoftheUSAsuccessfulstatesmanAleadingAmericanauthorAprinterApublisherAsuccessfuldiplomatAcreativescientistAninventorFillinthetable1.whatFranklin’sexperimentaimedtoprove.2.WhatdoesthenewstudysayaboutthestoryofFranklin’sexperiment?3.WhydoestheauthormentionthestoryabouttheapplefallingonNewton’sheadinthetext?Franklin'sexperimentaimedtoprovethatlightningwasaformofelectricity.Hisexperimentaimedtotestiflightningwasreallyproducedbyelectricityorsomethingelse.Newresearchsuggeststhatthestorymaybefictioninsteadoffact.Fast-reading2.Readthetextagainandmatchthemainideaswiththeparagraph(s).1．Paragraphs1A．Theeffectoftheexperiment.2．Paragraphs2B.TheintroductiontoFranklin’sfamousexperiment.3．Paragraphs3 C．ArethestoriesofFranklin’sandNewton’strue?4．Paragraphs4－6 D．Howtheexperimentiscarriedout.payattentiontothefirstandthelastsentence.Careful-readinga).Franklin’sspiritofscientificexplorationisstillconsideredaninspiration._________b).PeopleareamazedatandinspiredbyFranklin’sexperiment.___________c).ScientistsquestionwhatreallyhappenedinFranklin’sexperiment._________Numberthestatementstoshowhowpeople’sattitudestowardsFranklin’sexperimenthavechanged.312Answerthetwoquestions:PassageStructure1.Howdoyouunderstandthestatement“...weshouldnotalwaysbelieveeverythingwereadorhear‒evenifitisagreatstory”?2.Whatqualitiesdoyouthinkagreatscientistshouldhave?Ithinkthestatementisright.Froma

scientific

standpoint,peopleshouldstick

to

thefactsandthefactsshouldbeprovedbyexperimentsandresearch.Agoodstoryisfictionwhichisoftenmoreinterestingthanthetruth.Asagreatscientist,heorsheshouldhavemorethanonegoodquality,suchasbeingsmart,honest,objective,persistent,curious,imaginative.Giveatalkabouttheirunderstandingofthesaying“Seeingisbelieving.”ThestudentscompletetheexercisestepbystepundertheguidanceofActivity4.Workingroups.a)Yourunderstanding:b)SupportingdetailsAstheoldChinesesayinggoes,“Whatyouhearmaybefalse,butwhat youseeistrue.”Weofteneasilybelieveinwhatweseeorhearwithdoubt,butasamatteroffact,itisnotalwayssoconvincing.1.NewresearchsuggeststhatthestoryofFranklin’sexperimentmaybefictioninsteadoffact.2.SomescientistsquestionsthestoryaboutanapplethatfellonNewton’sheadandledhimtocomeupwithhistheoryofgravity.Infact,thereisnoproofthattheapplehithimonthehead.ThinkandshareWorkingroups.c)Fromthepassagewecanlearn...Somepartsofthestoriesaretrue,andsomearenot,becausetheydon’tfollowthecommonsense.However,thescientists’spiritofscientificexplorationiswhatmostlymatters.Personally,wecannotbecontentwithwhatweseeorhear.Astheoldsayinggoes,“Practiceisthesolecriterionfortestingtruth.”Whatweseeorhearistrueorfalseremainstobeseeninthefuture.Pleasedon’thesitatetotastewhatyouseeorhear.ThinkandshareGoodbye第3课时Unit3

Theworldofscience

1.Readanexperimentreportandunderstandthestructureofanexperimentreport.2.Practiseanexperimentreportwiththehelpofthegivenstructure.3.ImproveyourownabilityofwritingGoalsBenjaminFranklinwasoneoftheFoundingFathersoftheUnitedStates.Apart1._____beingasuccessfulstatements,hewasalsoa2._______(create)scientistaninventor.BenjaminFranklin3.________(fly)akiteduringastormin1752.heraisedthekitewithapieceofsting4.______(tire)toit.Ametalkeywasattachedtithesting.Aflashoflightinghitthekite,andelectricitywasconductedthroughthestingtothekey.Franklinthentouchedthekeyandgot5.________electricshock.Generationsofschoolchildrenhavebeenamazedbyhis6.___________(brave)andscientificapproachto7.________(look)forthetruth.However,newresearchsuggeststhatthestorymaybefictioninsteadofafact.Morethanonescientisthasquestioned8._______reallyhappened.TheyallagreedthatifFranklinhad9.___________(actual)touchedthekey,hewouldcertainlyhavediedfromelectricshock.Inscience,factsshould10.________(prove)byexperimentsandresearch,andweshouldnotalwaysbelieveeverythingwereadorhear--evenifitisagreatstory.HomeworkcheckingfromcreativeflewtiredanbraverylookingwhatactuallybeprovedReadtheinstructions(onpage35)fortheexperimentandanswerthequestions.2.Whatcanyoulearnfromthisexperiment?1.Whatwilltheresultsofthisexperimentbe?Aftertheeggissuckedintothemouthofthebottle,itisslowlyabsorbedintothebottleandfallstothebottom.Throughmyownexperience,Ihavelearnedthataslongaswestudyhard,observeandthinkcarefully,wecanfigureoutthesecretofsomescientificfacts.WritinghelpHowtowriteanexperimentreport:①.Introduction:②.Mainbody:③.Conclusion:Introducetheaimoftheexperiment.Describethematerialsusedintheexperimentandexplaintheprocedure.Reporttheresultsandwhatyouhavelearnt.FillinthetableIntroductionMainbodyconclusionTheaimoftheexperimentThematerialsusedandtheprocedureTheresultandwhatwehavelearnedThisexperimentisdesignedtoa)______________________Iprepareb)____________________________________________________todothisexperimentProcedurec)_________________________________________________________________________________________________________________________________________________________________________________________________________________Aftertheexperiment,Icandrawtheconclusionthatd)figureoutwhytheboiledeggisswallowedbythehotglass.suchmaterialsasaboiledegg,aglassbottleandhotwater1)Removetheshelloftheegg.2)Carefullypoursomehotwaterintothebottle.3)Shakethebottlegently.4)Pourthehotwater.5)Quicklyputtheeggontopofthebottle.Aftertheexperiment,Icandrawtheconclusionthatitistruethataboiledeggcanbeswallowedbyahotglassbottleintherightexperiment.Throughthismyownexperience,Ihavelearnedthatsolongaswejuststudyhard,observeandthinkcarefully,wecanfigureoutthesecretofsomescientificknowledge.Theanswerisallaboutairpressure.Ifyoufirstsettheeggonanemptybottle,theairpressureinsidethebottlematchestheairpressureoutside,sonothinghappens.Butwhenyoupoursomehotwaterintothebottle,itcausestheairinsidetoheatupandexpandrapidly,sosomeoftheairinthebottlegetsout.Whentheeggisputonthebottle,theairpressureoutsideofthebottlepushestheeggintothebottle.Theresultisanunbalancedforce–theforceoftheairpushingontheeggfromoutsidethebottleisgreaterthantheforceoftheairpushinguponitfrominsidethebottle.Asaresult,theeggispushedintothe

bottle.Whydoestheegggetpushedinsidethebottle?DiscussionThisexperimentisdesignedtoprovewhetherairpressurereallyexists.Ipreparedthematerials,includingaboiledegg,aglassbottlewhoseneckisabitsmallerthantheegg,andsomehotwatertodothisexperiment.First,Iremovedtheshelloftheegg.Then,Icarefullypouredsomehotwaterintothebottle,andshookthebottlegently.Afterafewminutes,Ipouredoutthehotwater.Justatthesametime,Iquicklyplacedtheeggontopofthebottle.Aftertheexperiment,Icandrawtheconclusionthatairpressureindeedexists,anditisverypowerful.Itistheforceoftheairthatpushedtheeggintothebottle.WriteareportoftheexperimentandshareitwiththeclassTheexperimentisdesignedtoprove1.________airpressurereallyexists.Atthebeginningoftheexperiment,Ipreparedthematerials,2._________(include)aboiledegg,aglassbottle3.______neckisabitsmallerthantheegg,andsomehotwater.Withallthethings4.________(prepare),theexperimentbegan.First,Iremovedtheshelloftheegg.Then,I5.________(careful)pouredsomehotwaterintothebottle,and6.________(shake)thebottlegently.Afterafewminutes,Ipouredoutthehotwater.Justatthesametime,Iquicklyplaced7.______eggontopofthebottle.Tomy8.__________(amaze),theeggsqueezedintothebottleatonce.9._______theexperiment,Icandrawtheconclusion10.______airpressureindeedexists,anditisverypowerful.Itistheforceoftheairthatpushedtheeggintothebottle.FillintheblankswhetherincludingwhosepreparedcarefullyshooktheamazementAfterthat假如今天在物理老师的帮助下,你们做了一个有趣的实验。请根据以下实验步骤,用英语写一篇80词左右的短文。1.准备一支蜡烛、一个盆和一些水,一个比蜡烛稍高些的玻璃杯。2.将蜡烛置于盆底,并向盆中倒入一些水。3.点燃蜡烛,将玻璃杯罩在蜡烛上。4.当蜡烛熄灭后,看到玻璃