选修九 4.3Unit 4　Key to rcises in the workbook (III).ppt

新课标人教版课件系列 高中英语 选修 模块 9 4 3 experimentreports writing lookatthepicturesinexercise1andguesstheanswerstothequestions whatmaterialsarebeingusedinthisexperiment whatdoyouthinkthepurposeoftheexperimentis whatorderdoyouthinkthepicturesshouldgoin listeningonp79 numberthepicturesintheorderyouhearaboutthem 2 3 1 5 4 listentothefirstpartagainandanswerthequestions whatisthepurposeoftheexperiment tofindoutthreeimportantconditionsthatseedsneedinordertostartgrowing 2 arestudentsgoingtodotheexperimentingroupsorindividually ingroups 3 wherearethematerialsthatthestudentsneedtosetuptheexperiment onthebench 4 whatmaterialsdothestudentsneedtosetuptheexperiment fourdishesandfourpiecesofcloth adishofseeds sometapwater someboiledwaterandsomecookingoil thirdlisteninglistentothefirstpartagainandcompletethetableofconditionsthateachdishofseedswasgiven tapwater warmtemperature oxygen tapwater coldtemperature oxygen nowater warmtemperature oxygen boiledwater oil warmtemperature nooxygen fourthlisteningnowlistentothesecondpartofthetapeinwhichtheclassdiscussestheresultsoftheexperiment completethetableofresults yes becausetheyhadwater warmthandoxygen no becauseitwastoocold no no becausetheywerewateredwithboiledwaterwhichhasnooxygen 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 writingtask whenwritinganexperimentreport youcanaskquestionsabout thepositionoftheheadings whattheheadingsare theirorder howtheitemsinthe materials sectionarepresented asalist whatthe procedure tellsyou thestepsyoucarryouttosetuptheexperiment thegrammaticalstructuresusedforeachsectionofthereport outline materials a b c d aim tofindoutthreeimportantconditionsthatseedsneedinordertostartgrowing 1 fourdishes 2 fourpiecesofcloth 4 sometapwater 3 someboiledwater 5 adishofseeds 6 somecookingoil procedure putthepiecesofclothonthedishes spreadtheseedsonthecloth labelthedishesatod 2 takedishaandwettheclothwithtapwaterandplaceitinawell airedwarmspot sobythewindowovertherewouldbefine 3 takedishb wetitwithtapwaterandputitinthefridge 4 takedishcandputitnexttodisha donotwaterit 5 takedishdandwateritwiththeboiledwater thendropasmallamountofoilontotheseedsandputitnexttodishc 6 leavethemallforafewdays results disha dishb dishc dishd conclusion seedsneedwarmth 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 icuttheendsofaplasticbottleandwrappeditinda