1. Physical Geography of the USA
The US is divided into 50 states and 1 district. Most of the States in central North America, The total area is more than 9 and a half million sq. km. The world s 3rd largest country. Three land borders: 2 with Canada and 1 with Mexico. The United States shares land borders with Canada (to the north) and Mexico (to the south), and a territorial water border with Russia in the northwest. The contiguous forty-eight states are otherwise bounded by the Pacific Ocean on the west, the Atlantic Ocean on the east, and the Gulf of Mexico to the southeast. Alaska borders the Pacific Ocean to the south, the Bering Strait to the west, and the Arctic Ocean to the north, while Hawaii lies far to the southwest of the mainland in the Pacific Ocean.eight of the states are in the single region between Canada and Mexico; this group is referred to, with varying precision and formality, as the continental or contiguous United States, and as the Lower 48. Alaska, which is not included in the term contiguous United States, is at the northwestern end of North America, separated from the Lower 48 by Canada. The State of Hawaii is an archipelago in the Pacific Ocean. The capital city, Washington, District of Columbia, is a federal district located on land donated by the state of Maryland. (Virginia had also donated land, but it was returned in 1847.) The United States also has overseas territories with varying levels of independence and organization.States landscape varies greatly: temperate forestland on the East cast, the Mississippi-Missouri river system, the Great Lakes shared with Canada, Rocky Mountains west of the plains, deserts and temperate coastal zones west of Rocky Mountains and temperate rainforests in the Pacific Northwest, volcanic islands of Hawaii and Alaska.
2. Regions
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The geography of the United States varies across their immense area. Within the continental US, eight distinct physiographic divisions exist, though each is composed of several smaller physiographic subdivisions. These major divisions are:
Laurentian Upland - part of the Canadian Shield that extends into the northern United States Great Lakes area.
Atlantic Plain - the coastal regions of the eastern and southern parts includes the continental shelf, the Atlantic Coast and the Gulf Coast.
Appalachian Highlands - lying on the eastern side of the United States, it includes the Appalachian Mountains, the Watchung Mountains, the Adirondacks and New England province originally containing the Great Eastern Forest.
