![]() ![]() Initially named "National Military Establishment" Initially named "Department of Foreign Affairs" ![]() Government and politics in the United States Territories of the United States Location of the insular areas of the United States: Note that Alaska and Hawaii are shown at different scales, and that the Aleutian Islands and the uninhabited northwestern Hawaiian Islands are omitted from this map. In the following years, the number of states has grown steadily due to expansion to the west, conquest and purchase of lands by the American government, and division of existing states to the current number of 50 United States: Map of the United States with state border lines. state and Administrative divisionĪt the Declaration of Independence, the United States consisted of 13 states, former colonies of the United Kingdom. Pacific Mountain System – the coastal mountain ranges and features in the west coast of the United States.Īdministrative divisions of the United States States of the United States.It is the setting for the Grand Canyon, the Great Basin and Death Valley. Intermontane Plateaus – also divided into the Columbia Plateau, the Colorado Plateau and the Basin and Range Province, it is a system of plateaus, basins, ranges and gorges between the Rocky and Pacific Mountain Systems.Rocky Mountain System – one branch of the Cordilleran system lying far inland in the western states.Interior Highlands – also part of the interior contentintal United States, this division includes the Ozark Plateau.Interior Plains – part of the interior contentintal United States, it includes much of what is called the Great Plains.Appalachian Highlands – lying on the eastern side of the United States, it includes the Appalachian Mountains, Adirondacks and New England province.Atlantic Plain – the coastal regions of the eastern and southern parts includes the continental shelf, the Atlantic Coast and the Gulf Coast.Laurentian Upland – part of the Canadian Shield that extends into the northern United States Great Lakes area.Within the continental U.S., eight distinct physiographic divisions exist, though each is composed of several smaller physiographic subdivisions. The geography of the United States varies across their immense area. Physiographic divisions of the United States Lush temperate, subtropical, and tropical vegetation and low to moderately high mountains prevail throughout the humid east, and high mountains, plateaus, temperate and subtropical savannas, and hot dry deserts prevail in the west. Cities of the United States, by populationĮnvironment of the United States An enlargeable satellite composite image of the contiguous United States.Area of the United States: 9,826,630 km 2 (3,794,080 sq mi) – 4th most extensive country.Population of the United States: 308,745,538 (2010 census) – 3rd most populous country. ![]()
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