Unit16Scientistsatwork_1精品文檔

1、unit 16 scientists at workunit16scientistsatwork一、明確教學(xué)目標(biāo).developthestudentsreadingability,especiallytheirreadingcomprehension.2.readthereadingpassageandknowabout3.enablethestudentstoknowtheseriousattitudetoscience.二、教學(xué)過程step1presentation（整體感知）doyouknowthenamesofsomefamousscientist?whataretheyfamousf

2、or?einsteindarwinnewtonedisonmariecuriefranklinrelativetheoryevolutiongravityelectricbulbradioactivitykiteexperimenttodaywecometothereading.itsaboutasweallknow,benjaminfranklinisafamouspoliticianbuttoday,wewillreadapassageabouthimasascientist.hisseriousattitudetoscience.letsseehowfranklinmadehisfamo

3、uselectricityexperimentbyflyingakitestep2pre-readingdiscussionsweallknowthatitisthescientistsgreateffortthatmakesthegreatachievementonscience.couldyounamesomescientistsnames?andwhataretheyfamousfor?trytofillintheblanksofthefollowingform,ifyoucant,askyourclassmatetohelpyouform:inthe18th&19thcentu

4、riesscientistsallovertheworldmademanyimportantdiscoveriesgivesomeexamplephysicsmedicinechemistrybiologysomefamousscientistsare:archimedes:mathematicsandphysics:hediscoveredpidarwin:biology:hediscoveredthattheancestorsofpeopleweremonkeyscurie:physics:shediscoveredradiumandradio¬activitynewton:phy

5、sics:hediscoveredwhyallthingsfalldowntoearth.physicsmedicinechemistrybiologymadamecurieflorencenightingalewatson&crickbeatrixpotterisaacnewtonjohnsnowgay-lussaccharlesdarwinlordkelvinlouispasteurmendeleevcarllinnaeusstep3readingfastreadinglistentothetapeandanswerthefollowingquestion.wastheexperi

6、mentdoneinjune1752successful?yes,theexperimentwassuccessful2.whatdidthisexperimentprove?thisexperimentprovedthatlight-ingandelectricitywerethesame.readthetextcarefullyagain,andgivethestudentssomeexplanations.getthestudentsreadthetestandthendecideifthefollowingstatementsaretrueorfalse.in1752scientist

7、salreadyknewwhatelectricityis.t2franklinwashelpedbyafriendtodotheexperiment.3franklinmadethekiteofsilkbecausewetsilkdoesnotconductelectricity.4acondenserwasusedintheexperimenttostoreelectricity.t5thekeytiedtothestringwasputintothedoortostophekitefromflyingaway.6.franklinconductedthekiteexperimentins

8、unnydays.readhepassageandthenfindoutthemainideaparagraph1introductionoffranklinsexperimentparagraph23theprocessoftheexperimentparagraph46thetipofdoingtheexperimentaim:toshowthatlightningandelectricityarethesame.materials:somewoodensticks,apieceofsilk,somerope,averysharppieceofmetal,asilkribbon,akey,

9、acondenser,asmallshed,athunderstormwithlightning.instructions:paragraphs5and6.description:paragraph3.results:theelectricitystoredinthecondensercanbeusedtodootherexperiments,whichprovesthatlightningandelectric¬ityarethesame.discussion:none.step4listeningtothereadingpassageplaythetapeforthestudent

10、stolistenandfollow.payattentiontothepro-nunciationandintonation.step5post-readinganswerstoexercise1:1true2false3false4true5falsesuggestedanswerstoexercise2:hewantedtoprovethatlightningandelectricityarethesamething.2asilkkitewilllastlongerinbadweatherthanapa¬perkite.3yes.franklinsexperimentwasver

11、ydangerousbe¬causeifsomethingwentwronghecouldbekilledbythelightning.answerstoexercise3:1incorrect2correct3incorrect4correctextension1franklinsaid,youcancollectandstoretheelectricitywiththecondenseranduseitforotherexperiments.askstudentswhatotherkindsofsimpleexperimentscouldbedoneusingtheelectric

12、itystoredinthecondenser.benjaminfranklinconductedmanyexperimentsinhislife.youmightwantyoursstogoontheinternettofindoutwhattheywereandreportbacktotheclass.step6summarythepurposeoftheexperimenttoshowthelightingandelectricityarethesame:time:june1752people:franklin,hissonplace:ashedinthefieldsweather:thunderstorm,rainydayfourthings