GPS(globalpositioningsystem)ZhengHe1371-1433HeledalargefleettoexploreSoutheastAsia,IndiaandtheMiddleEastintheMingDynasty
Altogetherhemade7voyagesinthe15thcentury
MarcoPolo1254--1324HeisthemostfamouswesternertotraveltheSilkRoad
Whileinprison,hetoldthestoryofhistravelstoafellowprisonerwhowrotehisadventuresdown
WhenthebookthetravelsofMarcoPolowaspublished,itbecameabest-seller
Scanthewholetextandmakeamind-map
Mind-mapMainideaHowseamenexploredtheoceansbefore17CnaturecoastlinecelestialbodiesNorthStarSunwildlifeseaweedbirdsweatherseacloudsfogwindsnavigationalinstrumentslongitudelatitudetheBearingCircletheAstrolabetheQuadranttheSextantknottedropecompass&mathsComprehendyourgeographicalknowledgeanddiscussthemethodsyouarefamiliarwithandsharewithothers
(Makeadiagramifnecessary)Students’workWorkinpairs