How did America divided to south and north america?

Answer 1

If you mean the Canada/US split, much of Canada was once owned by the Hudson's Bay company (the largest land ownership by a company in human history, about half the size of the US) which chose to merge with the parts that already were Canada (Ontario, Quebec, etc.).
The last parts, British Columbia and Alberta, chose to join Canada because the US promised nothing but statehood and Canada promised a national railway. The US got Alaska only because the Russians owned it and sold to them; they probably would have joined Canada.

That's the short answer, look it up if you need more.

Answer 2

The Americas consist of the continents of North America and South America and their associated islands, located entirely within the Western Hemisphere. They are often referred to as the New World, juxtaposed with the Old World, as they were unknown to the civilizations of Europe, Asia and Africa until 1492.

The term is a relatively recent and less ambiguous alternative to the term America, which may refer to either the entire landmass or the colloquial name for the United States of America. The original usage to describe what is sometimes considered a single continent or supercontinent is deprecated for clarity, for which the Americas is used to collectively refer to the landmass and various regions of it. When used to describe a single landmass, analogous terms to America or (the) Americas are Eurasia, which consists of Europe and Asia collectively, and Eurafrasia, which is Eurasia and Africa.
The earliest known use of the name America for this particular landmass dates from 1507. It appears on a globe and a large map created by the German cartographer Martin Waldseemüller in Saint-Dié-des-Vosges. An accompanying book, Cosmographiae Introductio, explains that the name was derived from the Latinized version of the explorer Amerigo Vespucci's name, Americus Vespucius, in its feminine form, America, as the other continents all have Latin feminine names.

http://en.wikipedia.org/wiki/Americas

Answer 3

Amerigo Vespucci was the first European navigator to reach the Americas after Columbus, and he was also the first to recognize that what he had discovered was not a route to Asia, but an entirely "new" world. That's why amateur German geographer, Waldseemuller, proposed naming the new continent "America" in Vespucci's honor, and the name became popular. When later voyages revealed another large land mass to the north, the names were assigned as North and South America.

Answer 4

It was never one America. America is actually named after Christopher Columbus's navigator who was the first to point out that ol' Chris hadn't gotten to the West Indies as he had first believed.

Answer 5

one is south and one is north