How is it possible for Russia to be part of two continents?

Russia is the biggest country of the world. By and large two mainlands are delineated by expansive regular wildernesses, for example, seas, mountain ranges, oceans. The limit among Asia and Europe is Ural mountain extend. As the instance of Russia it falls both in Europe and Asia however to its vast geographic field. The part west of Ural mountains in Russia falls in Europe while the eastern part falls in Asia. another such model is turkey. By and large a nation is put inside in a landmass however there are a few inconsistencies to accomodate such geographic ideas.