The six-continent combined-Eurasia model is mostly used in Russia and some parts of Eastern Europe.
The six-continent combined-America model is taught in some Romance-speaking countries and in Greece.[20]
The Olympic flag's five rings represent the five inhabited continents of the combined-America model but excludes the uninhabited Antarctica.[28]
In the English-speaking countries, geographers often use the term Oceania to denote a geographical region which includes most of the island countries and territories in the Pacific Ocean, as well as the continent of Australia.
"Continents: What is a Continent?". National Geographic. සම්ප්රවේශය 2009-08-22. "Most people recognize seven continents—Asia, Africa, North America, South America, Antarctica, Europe, and Australia, from largest to smallest—although sometimes Europe and Asia are considered a single continent, Eurasia."
.https://books.google.com/books?id=DJgnebGbAB8C&pg=PA215.ප්රතිෂ්ඨාපනය 26 June 2012."And since Africa and Asia are connected at the Suez Peninsula, Europe, Africa, and Asia are sometimes combined as Afro-Eurasia or Eurafrasia. The International Olympic Committee's official flag, containing [...] the single continent of America (North and South America being connected as the Isthmus of Panama).".
"4 Continents
This would probably be the correct subdivision if we adopted a strict definition of continents, ideally defined as large landmasses separated by water. Furthermore, we should consider "separated" only what is naturally separated, excluding therefore the separations resulting from the artificially made Panama Canal (which separates North and South America) and Suez Canal (which separates Africa from Eurasia).
Under this model, the four continents of the world are: Afro-Eurasia (or Eurafrasia), America, Antarctica, and Australia (not Oceania, which combines Australia with smaller countries in the Pacific Ocean which are separated by water).
An alternative four-continent model, introduced at the beginning of the 20th century, included Europe, Asia, Africa, and America."worldometers
"How many continents are there?". Wonderopolis. If you count Europe and Asia as one continent (called Eurasia), then there are six continents. Some people also count North America and South America as one continent (called America), since the two land masses are separated only by the human-made Panama Canal. This would allow for a model with only five continents.wonderopolis
"In some textbooks, North and South America are combined into "America" and/or Europe and Asia are combined into "Eurasia", for a grant total of 6 or even 5."scienceline
Martin W. Lewis and Kären E. Wigen, The Myth of Continents: A Critique of Metageography (Berkeley and Los Angeles: University of California Press, 1997)Wigen
"5 Continents
This model adopts the criteria of both the six-continent models, resulting in the following 5 continents: Africa, Eurasia, America, Oceania (or Australia), and Antarctica.
An alternative five-continent model is the one adopted, among others, by the Olympic Charter, which excludes Antarctica as uninhabited and lists the following five: Africa, Europe, Asia, America, and Oceania (or Australia)."worldometers2
"There are even geographical views that prefer the presence of both a Eurasian as well as one American continent. These geographers therefore contend that there should only be 5 continents."universetoday
"Continent". The Columbia Encyclopedia. New York: Columbia University Press. 2001. 2 February 2007 දින මුල් පිටපත වෙතින් සංරක්ෂණය කරන ලදී. – via Bartleby.
"Preamble"(PDF). Olympic Charter. International Olympic Committee. 17 July 2020. p.10. සම්ප්රවේශය 3 August 2021. the five interlaced rings, which represent the union of the five continents