What is the geographical name of the strip of land that seperates North and South America?

What was strip of land?  Land between North and South America?  What seperates north and south america?  What line seperates North and South korea?  What seperates north america from south america?  Where is the geographical center of north america near?  Whats is a narrow strip of land that connects continents?  Name the ocean that seperates southern europe and america?  Water that seperates north and south islands of newzeland?  Which line unofficially seperates the North from the South?  What narrow strip of water seperates north america and asia?  What is the strip of land that seperates north and south korea?  What narrow strip of land connects North the US and South the US?  What is the border that seperates north america from south america?  North the US and South the US are connected by what thin strip of land?  North America and south america are connected by what geographical land mass?  Central America connects North America to South America What is the geographical term for this type of land forms m?  Central america what is the geographical name of this strip of land that seperates noth america from south america?  Central america connects north america to south american what is the geographical term for this type of landform?  What is the geographical name for the type of land form that conects central america to north and south america?