geo

__Megaopolis:__a huge erbin area made up of several citys. __contiguous:__ in close proxsimity but not atually touching __prairie:__ a large strech of land with small sweeping hills. __cordillera:__ a chain of mountains,usually the principal mountain system or mountain axis of a large landmass. __canyon:__a deep vally with steep sides. __navigable____:__ deep and wide enoughto provide passage to ships. __glacier:__giant ice block __divide:__ split in half