美国地理概况.ppt

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1、TheGeographyoftheUnitedStatesALookatNorthAmerica-videoEightRegionsofNorthAmerica8RegionsofNorthAmericaCoastalRangeBasinandRangeRockyMountainsGreatPlainsInteriorLowlandsCanadianShieldAppalachianMountainsCoastalPlainsCoastalRangeWestoftheRockyMountainsStretchesfromCanadatoCaliforniaMadeupofRuggedM

2、ountainsandFertileValleysCoastalRangeCoastalRangeBasinandRangeWestoftheRockyMountainsEastoftheSierraNevadasandtheCascadesVaryingelevationsandisolatedmountainrangesDeathValleyDeathValleyisthelowestpointinNorthAmerica.ItisadesertvalleylocatedinEasternCalifornia.BasinandRangeRockyMountainsWestofthe

3、GreatPlainsEastoftheGreatBasinRuggedMountainswithHighElevationsIncludestheContinentalDivideTheContinentalDivide大陆分水岭determinesthedirectionalflowofriversRockyMountainsGreatPlainsWestoftheInteriorLowlandsEastoftheRockyMountainsFlatlandsthatincreaseinelevationslightlytothewestKnownforgrasslandsGrea

4、tPlainsGreatPlainsInteriorLowlandsWestoftheAppalachianMountainsEastoftheGreatPlainsLowlandsofrollingflatlandsRiversBroadvalleysandGrassyhillsInteriorLowlandsInteriorLowlandsCanadianShield加拿大地盾-videoWrapsaroundthesouthernportionsoftheGreatLakesandtheHudsonBayHillswornbyerosionHundredsofglaciercar

5、vedlakes冰川湖SomeoftheoldestrockformationsinNorthAmericaCanadianShieldTheseareTrees.ThousandsofLakesCanadianShield,rockformationsAppalachianMountainsWestoftheCoastalPlainsRangefromCanadatowesternAlabamaOldestmountainsinNorthAmericaOlderodedmountainsAppalachianMountainsAppalachianMountainsinthefall

6、.CoastalPlainsStretchesalongtheAtlanticOceanBroadlowlandwithexcellentharborsBorderstheGulfofMexicoLongsandybeachesAbayintheCoastalPlainsInlets河口,baysandcapes海角,岬alongtheCoastalPlainsTheContouroftheUSTheRockyMountainsinCanadaandtheUnitedStatesAppalachianMountainsMississippiRiverUSGeographyBasicsT

7、hirdlargestcountryintheworld.HalfthesizeofRussia.OnethirdthesizeofAfrica.HalfthesizeofSouthAmerica.2½timesthesizeofWesternEurope.Regions&TimeZonesoftheU.S.–video(GeographyoftheUSA)AmericanFlag-videoTheStarSpangledBanner(nat