THE UNITED STATES OF AMERICA

The United States of America (USA), is a country primarily located in central North America, between Canada and Mexico. It consists of 50 states, a federal district, five self-governing territories, and several other island possessions.At 3.8 million square miles (9.8 million square kilometers), it is the world’s third- or fourth-largest country by total area. With a population of over 328 million, it is the third most populous country in the world. The national capital is Washington, D.C., and the most populous city is New York City.The United States is a federal republic and a representative democracy with three separate branches of government, including a bicameral legislature. It is a founding member of the United Nations, World Bank, International Monetary Fund, Organization of American States (OAS), NATO, and other international organizations. It is a permanent member of the United Nations Security Council. The U.S.A. ranks high in international measures of economic freedom, lack of government corruption, quality of life, and quality of higher education. Despite income and wealth disparities, the United States continuously ranks high in measures of socioeconomic performance. It is one of the most racially and ethnically diverse nations in the world. Considered a melting pot of cultures, religions, and ethnicities, its population has been profoundly shaped by centuries of immigration.

the climate

The climate of the United States varies due to changes in latitude, and a range of geographic features, including mountains and deserts. Generally, on the mainland, the climate of the U.S. becomes warmer the further south one travels, and drier the further west, until one reaches the West Coast. Higher-elevation areas of the Rocky Mountains, the Wasatch Range, Sierra Nevada, and Cascade Range are alpine. Coastal areas of Oregon and Washington have an oceanic climate. The state of Alaska, on the northwestern corner of the North American continent, is largely dominated by a subarctic climate, but with a subpolar oceanic climate in the southeast, southwestern peninsula and Aleutian Islands, and a polar climate in the north.