Unit 5 Revealing nature Developing ideas示范公开课教学课件【外研版选修1】

Unit5RevealingnatureDevelopingideasActivity1Lookatthepicturesandtickwhatplantscando.Nowtalkaboutwhatelseyouthinktheplantscandoandgiveexamples.attackbreatheeatsleepmovespeakstealthink✔✔✔✔✔Activity2Readthepassageandfindoutthewaysinwhichplantscommunicate.Theymaycommunicatewitheachotherbyusingchemicals,soundand“woodwideweb”.Activity3Completethediagram.Activity3Completethediagram.1.communicatewitheachother2.fromtheleaves3.releaseitsown,differentchemicals4.withtheirroots5.tellifaneighbouringplantishelpful,orunfriendly6.clickingnoiseswhenthereisnotenoughwater,indicatingdroughtisarriving7.therootsofdifferentplantstoeachother8.shareinformationandevenfood9.stealfoodfromeachother,orspreadpoisonsThink&Share1.Personification.Itcanmakedescriptionsmorevivid.2.“woodwideweb”referstoanamazingsystemofcommunicationthatcanlinknearlyeveryplantinaforest.Itislinkedundergroundbyfungiandthisfungalnetworklinkstherootsofdifferentplantstoeachother.Usingthewoodwideweb,plantscanshareinformationandevenfoodwitheachother.Think&Share3.Itwillhelpusknowmoreabouttheworldofplantsandthengetabetterunderstandingofthesecretofnatureandencourageustoexploremoreaboutthemysteriousnature.What’smore,itwillteachusanimportantlesson,thatis,humanshouldliveinharmonywithmothernature.Anditisourresponsibilitytofulfillthemission.4.Passage1revealsthesecretofevolutionandPassage2revealsthesecretofcommunicationbetweenplants.Theyallreflectthattherearenumeroussecretsinnaturethatarewaitingtobeexplored.Activity4Workingroups.1Readthepassageagainandtalkabouthowplantscommunicate.2Thinkaboutanddiscussthefollowingwaysofcommunicationintheanimalworld.Whatotherwayscanyouthinkof?•Bees“dance”tosignaltootherbeesthattheyhavefoundfood.•Antscommunicatewitheachotherthroughtouch,chemicalsignals,movingtheirbodiesandevenusingtheirlegstomakesounds.Activity43Organiseyourideasfollowingthestepsbelow.•Beginwithwhatlivingthingsyouhavechosentotalkabout.•Explainhowtheycommunicateandgiveexamples.•Concludebyexplainingwhatwehavelearntfromtheirbehaviour.4Giveatalktotheclassaboutcommunicationbetweenlivingthings.Nowtalkabouthowwellyoucontributedtoyourgroupdiscussionandhelpeachothertomakeimprovements.Activity5Readtheobservationaljournalandanswerthequestions.Howwerethedaffodilbulbsplanted?Theywereplantedsidebysideinsoilwiththepointedendsfacingup.2.Inwhatenvironmentdidtheleavesgrow?Theleavesgrewinasunny,butcoolplace.3.Whatdotheflowerslooklike?Theflowersareyellowandwhite,andshapedliketrumpets.Activity6Workinpairs.Lookatthepicturesandtalkabouthowthesunflowergrows.Writeyourobservationaljournalaboutthesunflower.Activity7Workinpairs.Makeimprovementstoeachother’sobservationaljournalsandsharethemwiththeclass.Anobservationaljournalaboutthesunflower1JuneGermination（使发芽）Coveredwith1/2cmofmoistsoil,thesunflowerseedtakesfiveto12daystocomeupafterbeingplanted.Waterhasbeenaddedregularlyandthehardseedcoatsoftensinthedampsoiltoallowthefirstroottopiercedownwardsandthefirstleavestopushtothesoilsurface.Activity7Workinpairs.Makeimprovementstoeachother’sobservationaljournalsandsharethemwiththeclass.6JulyGrowthTherootcontinuestogrowdownward.Thesinglestemgrowshollowandsmooth,revealinglargespade-shapedleavesfromthegrowingtip.Gradually,theplant‘sgrowingtiprevealsthefirsthintsofdevelopmentoftheflowerbud.Theplantstembecomesmorewoody.Activity7Workinpairs.Makeimprovementstoeachother’sobservationaljournalsandsharethemwiththeclass.26JulyFloweringAboutthreeweeksaftertheflowerbudfirstbecomesvisibleatthetipofthesunflowerstem,itenlargesandbeginstorevealaflatteneddisk.Overthecourseofoneweek,theyellowrayflorets,thediskfloretsbloomacrossthecoreofthesunflowerblossom.Itisyellow,lookingbeautiful.Thankyou!敬请各位老师提出宝贵意见！Goodbye！