人教版选修九课件Unit 4 Exploring Writing

ExperimentreportsWriting,LookatthepicturesinExercise1andguesstheanswerstothequestions:Whatmaterialsarebeingusedinthisexperiment?Whatdoyouthinkthepurposeoftheexperimentis?Whatorderdoyouthinkthepicturesshouldgoin?ListeningonP79,Numberthepicturesintheorderyouhearaboutthem.23154,Listentothefirstpartagainandanswerthequestions.Whatisthepurposeoftheexperiment?Tofindoutthreeimportantconditionsthatseedsneedinordertostartgrowing.,2.Arestudentsgoingtodotheexperimentingroupsorindividually?Ingroups.3.Wherearethematerialsthatthestudentsneedtosetuptheexperiment?Onthebench.,4.Whatmaterialsdothestudentsneedtosetuptheexperiment?Fourdishesandfourpiecesofcloth,adishofseeds,sometapwater,someboiledwaterandsomecookingoil.,ThirdlisteningListentothefirstpartagainandcompletethetableofconditionsthateachdishofseedswasgiven.,ConditionsDishADishBDishCDishDtapwater,warmtemperature,oxygentapwater,coldtemperature,oxygennowater,warmtemperature,oxygenboiledwater,oil,warmtemperature,nooxygen,FourthlisteningNowlistentothesecondpartofthetapeinwhichtheclassdiscussestheresultsoftheexperiment.Completethetableofresults.,Didtheseedsgrow?ReasonswhyorwhynotDishADishBYesBecausetheyhadwater,warmthandoxygen.NoBecauseitwastoocold.,Didtheseedsgrow?ReasonswhyorwhynotDishCDishDNoNoBecausetheywerewateredwithboiledwaterwhichhasnooxygen.Also,theywerecoveredwithoilwhichpreventedoxygengettingtotheseeds.Becausetheydidn’tgetanywater.,Listentothesecondpartofthetapeagainanddiscussthequestion:Whatwastheconclusionoftheexperiment?Seedsneedwarmth,waterandoxygentogrow.,AnexperimentonplantsPart1:Listentoateacher(TH)helpingherclasssetupanexperiment.TH:OK,everybody,thismorningwe’regoingtodoanexperimenttofindoutthreeimportantconditionsthatseedsneedinordertostartgrowing.LISTENINGTEXT,Thematerialsareallonthebench.Choosesomeonefromyourgrouptogoandgetfourdishesandfourpiecesofcloth,adishofseeds,sometapwater,someboiledwaterandsomecookingoil.Lookattheinstructionsontheboard.Let’sreadthroughthem.,One:Putthepiecesofclothonthedishesandspreadtheseedsonthecloth.LabelthedishesAtoD.Two:TakeDishAandwettheclothwithtapwaterandplaceitinawell-airedwarmspot–sobythewindowovertherewouldbefine.Three:TakeDishB,wetitwithtapwaterandputitinthefridge.,Four:TakeDishCandputitnexttoDishA.Donotwaterit.Five:TakeDishDandwateritwiththeboiledwater.ThendropasmallamountofoilontotheclothandputitnexttoDishC.Six:Leavethemallforafewdays.OK,nowyoucangoaheadandsetuptheexperiment.,Part2:Listentotheclassdiscussingtheresultsoftheexperiment.StudentsincludeAndrew(A),Rosemary(R)andSandy(S).TH:Right,let’stalkaboutwhat’shappenedinourexperiment.Whataretheresults?Andrew?A:TheseedsinDishAhavestartedgrowingbutnoneoftheothershave.,TH:Good.WhydoyouthinktheseedsinDishBdidn’tgrow?Rosemary?R:Becauseitwastoocold?TH:That’sright.AndwhataboutDishC?,R:Theseedsdidn’tgetanywatersotheycouldn’tgrow.TH:Yes.Now,DishDisinteresting.Theseedsgotbothwaterandwarmthsowhydidn’ttheygrow?Anyideas?Andrew?,A:Well,theseedsgotboiledwater.TH:So,why’sthatimportant?Anyone?Well,boiledwaterhasnooxygeninitandseedsneedoxygentogrow.AndWhatabouttheoil?Sandy?S:Wouldn’ttheoilmakesurethatnoOxygencouldgettotheseeds?,TH:Excellent.Welldone.So,what’sourconclusionaboutthreeimportantconditionsthataseedneedsinordertostartgrowing?S:Thatseedsneedwarmth,waterandoxygentogrow.,TH:Verygood.NowIwantyoualltowriteuptheexperimentinyoursciencenotebook.,WritingtaskWhenwritinganexperimentreport,youcanaskquestionsabout:●thepositionoftheheadings,whattheheadingsare,theirorder:●howtheitemsinthe“materials”sectionarepresented(asalist);,●whatthe“procedure”tellsyou(thestepsyoucarryouttosetuptheexperiment);●thegrammaticalstructuresusedforeachsectionofthereport.,OutlineMaterials:ABCDAim:Tofindoutthreeimportantconditionsthatseedsneedinordertostartgrowing.1.fourdishes2.fourpiecesofcloth,4.sometapwater3.someboiledwater5.adishofseeds6.somecookingoil,Procedure:Putthepiecesofclothonthedishes.Spreadtheseedsonthecloth.LabelthedishesAtoD.2.TakeDishAandwettheclothwithtapwaterandplaceitinawell-airedwarmspot—sobythewindowovertherewouldbefine.3.TakeDishB,wetitwithtapwaterandputitinthefridge.,4.TakeDishCandputitnexttoDishA.Donotwaterit.5.TakeDishDandwateritwiththeboiledwater.ThendropasmallamountofoilontotheseedsandputitnexttoDishC.6.Leavethemallforafewdays.,ResultsDishA:DishB:DishC:DishD:ConclusionSeedsneedwarmth,waterandoxygentogrow.Theseedsgrew.Theseedsdidn’tgrow.Theseedsdidn’tgrow.Theseedsdidn’tgrow.,Samplereport:Ididtheexperimenttofindoutthreeimportantconditionsthatseedsneedinordertostartgrowing.First,Iputthefourpiecesofclothoneachdish,spreadtheseedsontheclothandlabelthedishesAtoD.,ThenIplacedDishAinawell-airedwarmspotbythewindow,tookDishBandwetitwithtapwaterandputitinthefridge,tookDishCandputitnexttoDishAwithoutwateringit.,FinallyIwateredDishDwiththeboiledwater,droppedasmallamountofcookingoilontotheseedsandputitnexttoDishC.Afewdayslater,IfoundthatonlyDishAgrew.SoIdrewaconclusionthatseedsneedwarmth,waterandoxygentogrow.,Discussion:Lookatthepicturesofaplantexperiment.Thepicturesareinthecorrectorder.Discusswithpartnersabouttheprocessestheplantsgothrough.Reporteachpictureonebyone:,Plantthreebeansinapot,waterthemandleavetheminawarm,lightspot.,Twosmallshootsappear.,Cuttheendsoffaplasticbottle.,Wrapthebottleindarkpaper.,Laythebottleonitssideinthepotandputsomewetpapertowelinside.Putoneoftheseedsinthecentreofthebottle.,Theseedhavetwolongshoots,oneheadingtowardsthesoilandtheothergrowinguptowardthelight.,Sample:Iplantedthreebeansinapot,wateredthemandlefttheminawarmlightspot.Inaweekeachseedhadtwosmallshoots.Icuttheendsofaplasticbottleandwrappeditindarkpaper.Ilaidthebottleonitssideonthetopofthepotofsoilandplaceawetpieceofpapertowelinsidethebottle.,Iputoneoftheseedsinthecentreofthebottle.Twoweekslatertheseedhadtwoshoots,onegrowingupandtheothergrowingdown.SoIdrewaconclusionthatshootsgrowuptowardsthelight,rootsgrowdownwardsintothesoil.