Is the largest country in the world, lies on a landmass comprised of two continents called it is separated by the mountains . most of its population lives in __4__ to the of the mountains 1: russia , the czech repub, ukraine, slovenia 2: pangea , atlantis, gondwana, eurasia 3: dinaric, ural, caucasus, balkan 4: the artic, europe, asia , siberia 5: south, east, north, west