What is a continent?

What is a continent?
A continent is a huge, continuous stretch of land that is generally thought of as a single location. According to size, Asia, Africa, North America, South America, Antarctica, Europe, and Australia are the seven continents on Earth. Europe and Asia are referred to as a single continent by the word Eurasia. Tectonic plate locations loosely connect with continents.  A continent is not defined by its size, location, who found it, or if it is surrounded by oceans from a geology standpoint but it is defined by the rocks it is made of and how it got to be that way.

A continent is described as a huge, continuous, distinct body of land, ideally separated by an expanse of ocean. This term creates some ambiguity. Many of today's continents are not independent landmasses separated by bodies of water. The adjective "big" leads to arbitrary classification: Greenland is the world's largest island, with a surface area of 2,166,086 km2, yet

Australia is a continent, with a landmass of 7,617,930 km2. Because of the existence of the continental shelf and oceanic islands, the requirement that each be a continuous landmass is overlooked, and the classification of North and South America, Asia, and Africa as continents without a natural division by water is disputed. If Europe and Asia are regarded as two continents, this concept remains. Furthermore, the Earth's major landmasses are encircled by a single, continuous World ocean that has been separated into several distinct 'oceans' by the landmasses themselves and several other geographic factors. The number of continents has fluctuated throughout time as the Earth has evolved.

Composition of continents
Plate tectonics and continental drift have influenced the composition of continents. There was just one landmass when the world was created (the Mesozoic Era). This continent did not appear anywhere. Plate tectonics and continental movement crushed partly formed magma together, causing it to burst. Those forces are active even today.  
Different countries supports in different models of continent. In China and most English-speaking nations, the seven-continent model is commonly taught. The geographic community, the former Soviet Union, and Japan advocate a six-continent model uniting Europe and Asia.
The continental platforms "float" on a crust of heavier material that forms a layer entirely enclosing the Earth.  Each continent has a shield zone, which formed 2 billion to 4 billion years ago and serves as the continent's core, to which the rest (the majority) has been added. Even in the most ancient shield sections, the rocks are older in the center and younger at the edges, showing that the accumulation process began early.

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