Unit 2 Sailing the oceans-Listening 课件.ppt

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1、Unit2Sailingtheoceans-Listening课件1.Readthesewordsandthenlistentothetape.Circlethoseaidsthatearlysailorsusedtofindtheirway.compassmapsfishmovementsstarsweatherwavescurrentscloudsrainfallbirdsothershipsmountains2.Listentothetapeagainandfillinthechart.SailorsfromSeaorOceanSkillsPhoeniciaMediterr

2、aneanUsedtheskytofindtheirwayNorthPolynesiaNorwayPacificStudiedthewavesoftheoceanWatchedbirdstofindland3.ThesearesomeVikingsailingdirectionsfromNorwaytoGreenland.SailwestbutkeeptothenorthoftheShetlandIslandssoyoucanhardlyseethemingoodweather.StayfarenoughsouthoftheFaroessothattheirsteepmounta

3、insarejusthalfwayupthehorizon.KeepsouthofIcelandsothatyoucannotseelandbutjustcoastalbirds.FollowthisrouteandyoushouldreachGreenland.Usetheinformationfromthelisteningtoexplainthesesailingstrategies.Vikingsusedtoprefertosailfollowingthecoastlinesotheycouldcheckthattheywereonthecorrectroute.Viki

4、ngsusedbirds,andnaturalfeatureslikemountains,todirecttheirships.LISTENINGTEXTNAVIGATIONALSECRETSWangMing(WM)hascometotheMaritimeMuseuminGreenwichtotalktothenavalhistorianDrSmith(DS).WM:Thankyousomuchfortalkingtome.Pleasecanyoutellmehowsailorsmanagedbeforenavigationalinstrumentsorsatelliteswer

5、einvented?DS:Ofcourse.Atfirstiftherewasnolandnearbytheseamenusedtheskytofindtheirway.Theylookedatthecloudsinthedaytimeandthestarsatnight.Butverysoontheybegantodeveloplocalmaps.About5,000yearsagosailorsfromPhoeniciainNorthAfricausedsimplemapstoguidetheirshipsaroundtheMediterraneanSea.Theyweret

6、hebesttradersoftheirday.WM:Really?Howcleaver!Dideverybodyusesimplemaps?DS:No.I'mafraidnot.Itwasdifficulttohaveamapforsailingacrossopenseathen.WeknowtheVikingsfromNorwayhadnowrittenmapswhentheysailedacrosstheNorthSea.WM:TheVikings?Didn'ttheysailaroundandattackpeopleandtownsfromtheirships?DS:So

7、metimes.Butwe'renotinterestedinthat,onlyintheirsuperiorsailingability.WM:Isee!Sowhatdidtheydo?DS:Well,oneofthethingstheydidwasconcentrateonwatchingbirds.There'sthestoryofaVikingcalledRaven-Floki.Heusedtokeepbirdsonhisshipsbuthedidn'tfeedthem.