Historia

THE CONTINENTS

The Earth's land is separated into large landmasses called continents. One definition of the term continent describes distinct and separate large landmasses,
continent: one of the seven very large areas that make up all of the earth's land
continents are understood to be large, continuous, discrete masses of land, ideally separated by expanses of water. Many of the seven mostcommonly recognized continents identified by convention are not discrete landmasses separated by water. The criterion "large" leads to arbitrary classification: Greenland, with a surface area of 2,166,086 square kilometres (836,330 sq mi) is considered the world's largest island, while Australia, at 7,617,930 square kilometres (2,941,300 sq mi) is deemed to be a continent. Likewise, the idealcriterion that each be a continuous landmass is often disregarded by the inclusion of the continental shelf and oceanic islands, and contradicted by classifying North and South America as two continents; and/or Eurasia and Africa as two continents, with no natural separation by water.

Extend of continents
The narrowest meaning of continent is that of a continuous] area of land or mainland, withthe coastline and any land boundaries forming the edge of the continent. In this sense the term continental Europe (sometimes "the Continent") is used to refer to mainland Europe, excluding islands such as Great Britain, Ireland, and Iceland, and the term continent of Australia may refer to the mainland of Australia, excluding Tasmania and New Guinea. Similarly, the continental UnitedStates refers to the 48 contiguous states in central North America and may include Alaska in the northwest of the continent (the two being separated by Canada), while excluding Hawaii in the middle of the Pacific Ocean.

Separation of continent
The ideal criterion that each continent be a discrete landmass is commonly disregarded in favor of more arbitrary, historical conventions. Of the seven most commonlyrecognized continents, only Antarctica and Australia are completely separated from other continents.
Several continents are defined not as absolutely distinct bodies but as "more or less discrete masses of land".[10] Asia and Africa are joined by the Isthmus of Suez, and North and South America by the Isthmus of Panama. Both theseisthmuses are very narrow in comparison with the bulk of thelandmasses they join, and both are transected by artificial canals (the Suez and Panama canals, respectively) which effectively separate these landmasses.

THE CONTINENTS ARE:

* EUROPa
* OCEANIA
* AMERICA
* ASIA
* ANTARTIDA
* AFRICA
* AMERICA

CONTINENTS AMERICAN

The Americas are lands in the Western Hemisphere that are also known as the New World. Comprising thecontinents of South America and North America, linked by the isthmus of Panama, along with their associated islands, they cover 8.3% of the Earth's total surface area (28.4% of its land area). The topography is dominated by the American Cordillera, a long chain of mountains that run the length of the west coast. The flatter eastern side of the Americas is dominated by large river basins, such asthe Amazon, Mississippi, and La Plata. Extending 14,000 km (8,699 mi) in a north-south orientation, the climate and ecology varies strongly across the Americas, from arctic tundra of Canada, Greenland, and Alaska, to the tropical rain forests in Central America and South America. When the continents joined 3 million years ago, the Great American Interchange resulted in many species being spreadacross the Americas, such as the cougar, porcupine and hummingbirds.
North America
The northern continent of the Western Hemisphere, extending northward from the Colombia-Panama border and including Central America, Mexico, the islands of the Caribbean Sea, the United States, Canada, the Arctic Archipelago, and Greenland.

Mexico City is arguable the largest metropolis in the world with a...