By your own definition that can't be true. North and South America are a single continuous land mass. You can walk from the top of North America to the bottom o

By your own definition that can't be true. North and South America are a single continuous land mass. You can walk from the top of North America to the bottom of South America. The same with Eurasian and Africa - they are 100% a connected land mass - you can walk from Europe to Asia to Africa, no problem. So by your own definition there are only 4 continents. To the best of my knowledge, almost everyone else says there are 7-8 continents (depending on whether you count Zealandia or not).