高中英语-4.3《Unit4-Key-to-exercises-in-the-workbook-(III)》课件-新人教版选修9VIP专享VIP免费

新课标人教版课件系列《高中英语》选修(模块）9-4.3ExperimentreportsLookatthepicturesinExercise1andguesstheanswerstothequestions:Whatmaterialsarebeingusedinthisexperiment?Whatdoyouthinkthepurposeoftheexperimentis?Whatorderdoyouthinkthepicturesshouldgoin?ListeningonP79Numberthepicturesintheorderyouhearaboutthem.23154Listentothefirstpartagainandanswerthequestions.1.Whatisthepurposeoftheexperiment?Tofindoutthreeimportantconditionsthatseedsneedinordertostartgrowing.2.Arestudentsgoingtodotheexperimentingroupsorindividually?Ingroups.3.Wherearethematerialsthatthestudentsneedtosetuptheexperiment?Onthebench.4.Whatmaterialsdothestudentsneedtosetuptheexperiment?Fourdishesandfourpiecesofcloth,adishofseeds,sometapwater,someboiledwaterandsomecookingoil.ThirdlisteningListentothefirstpartagainandcompletethetableofconditionsthateachdishofseedswasgiven.ConditionsDishADishBDishCDishDtapwater,warmtemperature,oxygentapwater,coldtemperature,oxygennowater,warmtemperature,oxygenboiledwater,oil,warmtemperature,nooxygenFourthlisteningNowlistentothesecondpartofthetapeinwhichtheclassdiscussestheresultsoftheexperiment.Completethetableofresults.Didtheseedsgrow?ReasonswhyorwhynotDishADishBYesBecausetheyhadwater,warmthandoxygen.NoBecauseitwastoocold.Didtheseedsgrow?ReasonswhyorwhynotDishCDishDNoNoBecausetheywerewateredwithboiledwaterwhichhasnooxygen.Also,theywerecoveredwithoilwhichpreventedoxygengettingtotheseeds.Becausetheydidn’tgetanywater.Listentothesecondpartofthetapeagainanddiscussthequestion:Whatwastheconclusionoftheexperiment?Seedsneedwarmth,waterandoxygentogrow.AnexperimentonplantsPart1:Listentoateacher(TH)helpingherclasssetupanexperiment.TH:OK,everybody,thismorningwe’regoingtodoanexperimenttofindoutthreeimportantconditionsthatseedsneedinordertostartgrowing.LISTENINGTEXTThematerialsareallonthebench.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.NowIwantyoualltowriteup...