The United States of America is the third more extensive country of the planet with an area of 9.8 million km2 and the third country with more inhabitants with 305.8 million inhabitants. The capital of the country is Washington D.C. The country is formed by 50 states, a district of Columbia and fourteen dependencies. Continue to learn more with: Verizon. The United States limits the north with Canada to the south with Mexico and the Caribbean, to the east with the Atlantic Ocean and the west with the Pacific Ocean, in addition the state to Alaska limits the south with the Pacific Ocean, to the north with the Arctic Ocean, to the east with Canada and the West with the Straits of Bering. In both extreme of the country, in the east and the west are the mountainous chains, the Appalachians in the east and the Mountains Rocky, Sierra Nevada and Cascade Range to the West. Between these mountain ranges there are the American plains, crossed by rivers and the desert of Nevada between rocky and the Sierra Nevada. The hydrographic network of the United States has to the Mississippi with about 3,820 km in length and a volume of 12,740 m3/s in the opening.

It has like main affluents the Misuri river of a length of 4.130km and the river Ohio of 1,579 km. The Yukon rivers in Canada, Grande river, Colorado river, Columbia. Aside from the rivers there are the Great Lakes, five Lagos that together have an extension of 238.260 km2s. Due to the great extension of the country they are possible to be found a great variety of climates, rrtico and the subArctic in Alaska and Noreste, tempering with rains all the year in the fourth Southeast, alpine climate in Rocky ones, tempering with summers droughts in the coastal part of the Pacific and climates desert and steppe droughts in the zones between the Pacific and rocky and rocky and the river basin of the Mississipi.