Unit 3 Using Language 課件 人教版（2019）選擇性必修第四冊

Unit3UNIT3SEAEXPLORATIONGettoknowaboutwhalesandotherseaanimalsToknowaboutwhalesandotheranimals.Tolearnhowtolistenforsequence.Touseproperexpressionstotalkaboutwhathappened.parrotfishcoralreefsea-starturtleeel鱔;鰻sharkHaveyouseenplantsandanimalsthatliveunderthesea?Wheredidyouseethem?Howmuchdoyouknowaboutwhales?Couldyoucompletethefunfactsaboutwhales?Whalescanholdtheirbreathsforatleast_____minutes.The________whaleisthelargestknowncreaturetoeverinhabittheplanet.Humpbackwhalessing_________songs.Thereare________typesofwhales.Whales________sleep.20bluecomplextwo

don’tReadtheposteronpage30,describethepicture.Thephotoisofa26-meterbluewhaleapproachingawhalewatchingboatinMontereyBay,California.1.Whataspectofthecampwouldyoulikebest?Iwouldliketheopportunitytoseethewhalescloseupbest.2.Doyouthinkitisimportanttocarryoutresearchonwhalesandotherseacreatures?

Thisresearchhelpsuslearnmoreaboutthewonderfulworldwelivein,anditalsohelpsuslearnmoreabouttheseamazingcreaturessothatwecanbetterprotectthem.Listentotheheadresearchertalkingtothecampersattheendoftheday.Whatthreethingswerethecampersaskedtodo?ListenforsequenceWhenpeopletalkaboutaseriesofactionsoreventshappeninginsequenceoftime,theyoftenusecertainwordsandphrases,suchasfirst,next,then,afterthat,later,andfinally.1.____________________________________2.____________________________________3.____________________________________

____________________________________tofindoutsomefactsforawhaleprofiletothinkaboutwhytheydowhaleresearchtogooutwithandwriteareportoftheworktheydoListentoLuke’spartoftheconversationagain.Numberthefollowingsentencesinthecorrectorder.Afterthat,wegavethegroupofwhalesaname,andeachmemberanumber.Theywillbeaddedtothedirectorysowecanidentifytheminthefuture.Mostwhaleshaveslightlydifferentfinsandmarks,whichcanhelpustotellthemapart.Meanwhile,wealsonotedtheirlocation,sowecantracktheirmovementsandplottheirmigrationpath.Thenwetookpicturesoftheirfins.Finally,wecontactedotherwhaleresearchgroupsaroundtheworldtosharetheinformationwiththem.First,wefollowedagroupofwhaleswiththeboat.Later,wecreatedadatabaseoftheirfinsandlocations.12345678n.目錄;名錄n.遷徙Listentotheconversationagainandanswerthequestions.Lookatthequestionsandcirclethekeywords.1.Howmanyspeciesofwhalesarethere?2.Whatisthecriteriontodividethemaintypesofwhales?3.Whatdowhalesusesoundsfor?4.Whydothecamperstakepicturesofthewhales'fins?5.Whydotheycontactotherresearchgroups?1.Howmanyspeciesofwhalesarethere?Over80.2.Whatisthecriteriontodividethemaintypesofwhales?

Thecriterioniswhethertheyhaveteethornot.3.Whatdowhalesusesoundsfor?

Theyusesoundstocommunicateandhunt.4.Whydothecamperstakepicturesofthewhales'fins?

Thiscanhelpthemtotellthewhalesapart.5.Whydotheycontactotherresearchgroups?

Theywanttoshareinformationwiththem.Completethemindmapandtalkaboutwhales.Whalesover80speciesWhaleswithteethWhaleswithoutteethfoodspeciesfoodtypicalspeciesfish,seaanimals70smallorganismsbluewhalelengthweight100feet200tonsSomeofthestudentscouldnotmakeittothecamp.Imagineyouwerethere.Tellyourpartneraboutwhathappened,usingtheexpressionsintheboxbelow.Yourpartnercanalsoaskquestionstofindoutmoreaboutwhathappened.A:Todaywelearntaboutwhalesandwhaleresearch.First,wefoundsomeinformationandfactsaboutwhales.WeusedthelibraryandtheInternet.B:Whatdidyoudoafterthat?First(ly),…Second(ly),...Third(ly),...Firstofall...Then/Afterthat/Afterwards/Next/Lateron…Intheend/Atlast,...Atthattime..Itbeganwhen...Meanwhile…Later…Finally…Expressingsequenceadv.與此同時A:Todaywelearntaboutwhalesandwhaleresearch.First,wefoundsomeinformationandfactsaboutwhales.WeusedthelibraryandtheInternet.B:Whatdidyoudoafterthat?A:Well,afterthatwethoughtaboutwhywedowhaleresearch.B:Butwhydowedowhaleresearch?A:Therearelotsofreasons.Firstofall,weneedtoknowhowmanywhalesthereare.Then,weneedtoknowwheretheygo.Andfinally,weneedtounderstandmoreaboutthem.B:Thenwhatdidyoudonext?A:Afterthat,wewentoutwhalewatching,followingagroupofwhalesinaboat.B:Thatsoundsgreat.Didyoujustwatchthem,ordidyoudoanythingelse?A:Westartedbytakingpicturesoftheirfins,sowecouldtellthemapart.Atthesametime,wenotedtheirlocation,sowecouldtrackthem.B:Whatdidyoudoafterwards?A:Wecreatedadatabaseandgaveeachwhaleanameandnumber.Thenfinally,wesharedourinformationwithotherwhaleresearchgroupsaroundtheworld.B:Itallsoundssowonderful!IwishIcouldhavejoinedyouA:Ido,too.WatchthevideoProtectingBiodiversity,andthendiscusswhatotherseaanimalsyouwouldliketosee.Talkwithyourpartnerandmakeaplanforatriptoseetheanimals.Yourplanshouldincludeactivitiesyouwouldliketodo.Forourtrip,wewouldliketogototheShanghaiOceanAquarium,whosethemeis“Spanningfivecontinentsbyaconnectionofwater”.Wecanfirstvisitthespecialexhibitionofsavingsharks.Thenwecangotoseetheseahorseswhosenumberdeclinedgreatlyforthepastdecade.However,mostpeopledonotknowmuchaboutseahorsesatall.IthinkweneedtoraiseawarenessaboutseahorsesandmarineconservationinChina.ThelastspotwillbeTheChinesePavilion,whichdisplaystheaquaticorganismsandbio-systemintheYangtzeRiverandsomenationalendangeredrareaquaticcreatures,likeChinesealligatorandChineseSturgeon.Ingroups,makealistofplantsandanimalsthatliveundertheseathatyouandyourclassmateshaveseeninanyofthewayslistedabove.Sharewhatyouknowabouttheseplantsandanimals.Doyouhaveanyfavoriteseaplantsoranimals?Tellyourclassmateswhattheyare.Whatdoyouknowabouttheoceans?SurveyForthevisitorsWhatismarinebiodiversityexactly?Whataretheworld’srarestmarinespecies?Whyaresomanyspeciesdisappearing?Howcanyouhelppromotemarinebiodiversity?ForthestaffinthemuseumDoesspeciesdiversityfollowanypatterns?Howismarinebiodiversitymeasured?Whatisbeingdonetopreservemarinebiodiversity?Whatdidyoudotopromotebiodiversitywhileexploringorstudyingtheoceans?ThelastwhalingstationinAustraliaclosedin1978.Whalesarenowanendangeredspeciesandinneedofconservation.Theyarenowprotectedbyaninternationalbanonwhaling.However,somecountriesopposetheban.Ingroupsdiscussthereasonsforandagainstbanningwhaling.Aspartofthe"TidesofChange"livestream,Areportertookadeepdivealongsideateamofmarinebiologiststowitnesstheirfascinatingworkunderneaththesea.Howtomakesuchanunderwaterlivestreamcometrue?Howtoplantcoralsintheocean?Whyisitimportanttoprotectthem?Let’swatchavideoandgettoknowwhatpeopledotoprotectbiodiversityandprotectth