Unit+1+Science+and+Scientists+Using+Language+(I)+課件【知識精講精研】高中英語人教版（2019）選擇性必修第二冊

Unit1Period3UsingLanguage(I)Talkaboutscientificexperiences新課導入Lookatthesephotos,andcanyousaywhattheyare?ChinaJiaolongSubmarineChinaSkyEyeTelescopeTheBeidouNavigationSatelliteSystem1.能學會使用圖片進行預測，獲取聽力對話中的線索和關鍵信息；2.能學會談論常見的科學現(xiàn)象。課堂學習Pre-listeningLookatthephotobelow,anddiscussingroupswhattheseactivitieshavetodowithscience.Ithinkthedishinthisexhibitionisrelatedtosound.Maybetheboyiswhisperingintothesmallercircleandthedishcanmakehisvoicelouder.AThislookslikeapianoyouplaywithyourfeet.Maybeitshowshowsoundworks.BI'mnotsurewhatthisoneshows,butitmustbeaboutlightoreyesight.CItisahallofmirrors.Maybeithastodowiththeprinciplesofreflection.Thisisprobablyanexperimentinvolvingthecompositionoflight.DEThephotosabovearerelatedtotheconversationyouwillhear.Usingthephotos,trytopredicttheanswerstothefollowingquestions.21Wherearethepeopleintheconversationgoingtogo?2Whatkindofplaceisit,andwhatdoesitfocuson?3Whatkindsofthingscanyoudothere?PredictbyusingpicturesOnewaytogetmoreoutofyourlisteningistopredictwhatyouwillhear.Usingthepicturesprovidedandtheknowledgeyoualreadyhave,youcanguessthekindsofinformationyoushouldlistenfor.Attimes,youmayevenbeabletoguessexactlywhatwillbetalkedabout.Thiswillhelpyoufocusbetterwhenlistening,makingyourlisteningmoreeffective.1Wherearethepeopleintheconversationgoingtogo?2Whatkindofplaceisit,andwhatdoesitfocuson?3Whatkindsofthingscanyoudothere?Youcanprobablytrydifferentactivitiestolearnaboutsound,light,reflection,andsoon.Forexample,youcangotoaroomwithmanymirrorsfacingeachothersoitlooks

liketherearemanycopiesofyou!Oryoucanplaywithabigpianoonthefloor.Theyaregoingtoasciencemuseum.Itisasciencemuseumthatfocusesonlettingvisitorsexperiencesciencethroughinteractivelearningexhibitions.ListentotheconversationandseeifyouranswersforActivity2arecorrect.Thenwritedowntheletters(A-E)forthephotosintheorderthatyouhearthemdescribed.3While-listening1._________2._________3._________4._________5._________DCEBAListenagainandcompletethedescriptionsofthephotosabove.4PhotoA:Agiantdish;whenyouspeakintoit,it_______thesoundbackand_____________.Youcanuseittospeakina_______tosomeone17metersaway.PhotoB:Agiant____________thatyoucanuseyourfeettoplay.Insteadofplayingthesoundsofapiano,itplaysthevoicesof_____________.PhotoC:Youlookatabluescreenforawhile,andthensuddenlyyoucansee

______________movingaroundonit.Theseareour____________.PhotoD:A____________whereyoucanseeyourselfreflectedthousandsoftimes.PhotoE:Youstandinfrontof____________anditcastsdifferentshadowsofyou,in____________therainbow.reflectsmakesitlouderwhisperpianokeyboardclassicalsingerstinybrightlightsownbloodcellshallofmirrorsawhitelighteverycolorofPost-listeningDiscussthefollowingquestionsingroups.51.TheconversationisabouttheCityofScienceandIndustry,amuseuminParis.Wouldyouliketogotothismuseum?Whyorwhynot?2.ArethereanymuseumslikethisinChina?Whatotherinterestingmuseumsarethere?Yes.Icanlearnalotaboutscienceanditcanbroadenmyhorizons.Yes.Thereareotherinterestingmuseumssuchasartmuseumormuseumaboutancienttreasure.Ingroups,chooseoneofthemuseumactivitiesonthepreviouspageorbrainstormanotherscientificresearchorexperimentthatyouareinterestedin.6waterplants5Gtechnologylifeforceenergy...Makeashortpresentationtotheclassaboutyourchoice.Usetheexampleandusefulphrasesbelowtohelpyou.7EXAMPLEToday,Iwanttotalktoyouaboutaverystrangephenomenoncalledanon-Newtonianfluid.Youcanmakeiteasilyusingequalpartsofwaterandcornflour,likeIhavehere.Anon-Newtonianfluidisstrangebecauseyoucanpouritlikealiquid,butifyouputanypressureonit,itsuddenlybecomeshardasconcrete.Infact,itbecomeshardenoughtostandon.Then,assoonasyoutakethepressureoff,itbecomesaliquidagain.Thisshowsthatitispossiblethatsomethingcanexistasaliquidandasolidatthesametime....can/cannotexistintheformofasolid/gasandaliquid/plasma......isbotha...anda...atthesametime... howlight/soundisreflected......theexistenceofother… Thisoccurswhen...Ifyou...,itwillbecome... Thatdemonstrates… Thisexperiment/researchshows... Throughthis,weknowthat... Wecanprovethat... Thisevidenceproves…TalkingaboutscientificphenomenaSampleToday,Iwanttotalktoyouaboutthepositiveandnegativechargesofmolecules.Wecandemonstratehowtheseinteractthroughasimpleexperimentusingmilk,dishsoap,andfoodcolouring.First,coverthebottomofashallowplatewithmilk.Nowaddtwoorthreedropsofdifferentliquidfoodcolouringtothecentreofthemilk.Theyshouldformonelargedarkpuddleinthemiddleofthemilk.Now,dipacottonswabintodishsoap,andplaceitintothemiddleofthefoodcolouring.Youwillseethecoloursquicklymovetoescapefromthesoap,makinginterestingandbeautifulpatterns.Thishappensbecausethedishsoapmoleculeshaveastrongnegativecharge,andthemilkmoleculeshaveastrongpositivecharge.Likemagnets,thesemoleculesareattractedtoeachother,andsotheyappeartomovearoundontheplate,takingthefoodcolouringwiththem,makingitlooklikethecoloursarequicklymovingtoescapefromthesoap.shadown.陰影；影子；背光處Eg:Youstandinfrontofawhitelight,anditcastsdifferentshadowsofyou,….你站在一道白光前，它投射出不同的你的影子，……Keypoints[歸納拓展]

shadow與shadeshadow指某物在光線的照射下映在墻上、地上等處的陰影。shade表示光線照不到的地方或陰涼處。[即學即練]

辨析填空：shadow,shade1.Infrontofourhousestandsatalltree,whichprovides________forusinsummer.2.