False, they are 7 continents
Note: In some parts of the world students are taught that there are only six continents, as they combine North America and South America into one continent called Americas. Other experts use only six continents by combining Europe and Asia into a continent called Eurasia.
The sentence:
Geologists use the term continent in a different manner than geographers, where a continent is defined by continental crust: a platform of metamorphic and igneous rock, largely of granitic composition.