The four oceans are the Pacific, Atlantic, Indian and Arctic, and the seven continents are North America, South America, Africa, Asia, Antarctica, Europe and Australia. However, some geographers consider there to be five oceans and either five or six continents.
Some geographers consider the Southern, also called the Antarctic, to be the fifth ocean. Rejecting the seven-continent model, some geographers consider there to be only six continents and combine Europe and Asia into Eurasia. Others argue that there are only five continents: Australia, Eurasia, Africa, Antarctica and the Americas. The argument against combining Europe and Asia or North and South America into one continent, however, illustrates the importance of considering cultural differences when demarcating continents.
Asia is the largest continent in the world, followed by Africa. The Pacific Ocean is the largest ocean.