I've lived in America my entire life and in school I always learned that there are 7 continents (North America, South America, Europe, Asia, Africa, Australia, and Antarctica) but my mother from Italy always argued that there are 5 continents (America, Europe, Asia, Africa, Oceania) she uses the example that there are 5 Olympic rings for each continent which makes sense but I was wondering why there's a difference in different places on earth.
Some people consider Eurasia to be one continent. I have read articles that claim Greenland is a continent. If North and South America are one continent, then Africa would seem to be one with Eurasia, as they are also joined by land. Beyond that, it seems to depend on what people consider a continent. I wouldn't consider Oceania a continent, for example.