Unit+5+Into+the+unknown+Listening+Facing+the+unknown 高中英語(yǔ)外研版選擇性必修第四冊(cè)

Unit5

IntotheunknownListeningFacingtheunknown1.Graspsomebasicfactsandthecurrentresearchsituationaboutthebrain;

2.Ignitethedesiretodigoutmorescientificmysteriesandformthehabitofsleepingearly.Readthepassageandanswerthequestions.Whatfunctionsofthebrainarementionedinthepassage?Whatisthecurrentresearchsituationconcerningthebrain?Doyouknowanyotherinterestingfactsaboutthebrain?Sharethemwiththeclass.71.Whatfunctionsofthebrainarementioned?Thebrainisthecentreofthenervoussystemandcontrolsmostofthebody’sactivities.Thebackpartofitisinvolvedwithourvisionandthesidesofitareinvolvedinmemory,speechandrhythm.2.What’sthecurrentresearchsituationaboutthebrain?Thereisstillalongwaytogobeforewecancompletelyunderstandtheworkingsofthebrain.Listentotheinterviewandchoosethetopicdiscussed.Methodstokeepthebrainhealthyandactive.Sleep-relatedmysteries.Waysofimprovingsleepquality.Methodsofinterpretingdreams.√8Listen

againandcompletethetable.

TheoriesDrLong’scommentsThebrainneedstimeto1_____________________.Recentstudiesprovethatourbrains2____________duringsleep.Thebrain3_____________________________whenwe’reawake.

Itneedssleepto4_____________________.Thereisn’t5_____________

toconfirmthis.Itmightnotbe6

______________________forsleep.restanddomaintenancemakeslotsofpoisonouschemicals

removethesechemicalsremainactiveenoughdatathemostimportantreason9TheoriesDrLong’scomments7__________________________________________inthebrainwhilewe’reawake,andthebrainreflectsonthemand8

___________________________inourdreams.Alotofresearchhasbeenconducted,butwestillcan’tprovethat9_____________________________.Otherunansweredquestions?Whydowe“see”ourdreams??10_____________________________________________________________________Whydosomepeopledreamincolourandothersdon’t

?sleepisnecessarytothisfunctionusethemtoformnewmemoriesNewconnectionsareformedbetweendifferentpartsNowusetheinformationintheformertabletogivealectureaboutsleep-relatedmysteriestotheclass.Dofurtherresearchifnecessary.

Individualwork:DeliveraspeechCompletetheboxeswiththeexpressionsfromtheinterview.

Couldyoutellussomethingabout...?Whatotherreasonscouldtherebeforit?It’sbecause......provethat...Wouldyoutellusmoreabout...?AskingformoreinformationExplainingCouldyoutellussomethingabout...?Whatotherreasonscouldtherebeforit?Wouldyoutellusmoreabout...?It’sbecause......provethat...10Interviewer:WelcometoScienceMatters.MyguesttodayisbrainscientistDrJaniceLong.

DrLong,couldyoutellussomethingaboutyourresearch?JaniceLong:Ofcourse.Oneofmyresearchareasissleep,surroundingwhichtherearestill

manymysteries.Forexample,wespendonethirdofourlivessleeping,butstill

don’tfullyunderstandwhyweneedsleep.Interviewer:It’sbecauseourbrainsneedtimetorestanddomaintenance,right?JaniceLong:Certainly,thatisbelievedbysomeresearchers.Butactually,morerecentstudies

provethatourbrainsremainactiveduringsleep.Interviewer:Really?Ifsleepisnotforrest,whatotherreasonscouldtherebeforit?JaniceLong:Anothertheorysayswesleepduetothebrainmakinglotsofpoisonous

chemicalswhenwe’reawake.Itcanonlyremovethesechemicalswhenwe’re

asleep.Butsofar,thereisn’tenoughdatatoproveit.Personally,Ithinkitmight

beonereasonforsleep,butnotthemostimportantone.ListeningmaterialInterviewer:Isee.Sowhatfactordoyoubelievetobethemaincauseofsleep?JaniceLong:Well,mostscientists,includingmyself,believethatsleep,especiallydreams,

canaidlearningandhelpusmakememories.Interviewer:Makememories?Wouldyoutellusmoreaboutthis?JaniceLong:Yousee,whilewe’reawake,newconnectionsareformedbetweendifferent

partsofthebrain.Sleepgivesourbrainstheopportunitytoreflectonthose

connectionsandusethemtoformnewmemoriesindreams.Interviewer:That’sfascinating.So,Iguesssleepisn’tquiteasmysteriousanymore?JaniceLong:Oh,Iwouldn’tsaythat.Thoughwe’veconductedalotofresearch,westill

can’tprovethatsleepisnecessarytothisfunction.Hopefullywe’llfigureit

outeventually!Interviewer:Goodluckwiththat!Andwhatothermysteriesaretheresurroundingsleep?JaniceLong:Well,therearemanyunansweredquestions:whydowe“see”ourdreams?Why

dosomepeopledreamincolourandothersdon’t?Thelistgoeson,andthereis

alotof