About USA

About The United States of America

The United States of America is a federal constitutional republic comprising fifty states and a federal district. The country is situated almost entirely in the western hemisphere: its forty-eight contiguous states and Washington, D.C., the capital district, lie in central North America between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south; the state of Alaska is in the northwest of the continent with Canada to its east, and the state of Hawaii is in the mid-Pacific. The United States also possesses fourteen territories, or insular areas, that are scattered around the Caribbean and Pacific.

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At 3.79 million square miles (9.83 million km²) and with over 300 million people, the United States is the third or fourth largest country by total area, and third largest by land area and by population. The United States is one of the world's most ethnically diverse nations, the product of large-scale immigration from many countries. Its national economy is the largest in the world, with a nominal 2006 gross domestic product (GDP) of more than US$13 trillion.
 
The nation was founded by thirteen colonies of Great Britain located along the Atlantic seaboard. Proclaiming themselves "states," they issued the Declaration of Independence on July 4, 1776. The rebellious states defeated Britain in the American Revolutionary War, the first successful colonial war of independence.

A federal convention adopted the current United States Constitution on September 17, 1787; its ratification the following year made the states part of a single republic. The Bill of Rights, comprising ten constitutional amendments, was ratified in 1791. In the nineteenth century, the United States acquired land from France, Spain, Mexico, and Russia, and annexed the Republic of Texas and the Republic of Hawaii. The American Civil War ended slavery in the United States and prevented a permanent split of the country. The Spanish-American War and World War I confirmed its status as a military power. In 1945, the United States emerged from World War II as the first country with nuclear weapons and a permanent member of the United Nations Security Council. The sole remaining superpower in the post–Cold War era, the United States is perceived by many as the dominant economic, political, cultural, and military force in the world.

Geography

The United States is the world's third or fourth largest nation by total area, before or after the People's Republic of China, depending on how two territories disputed by China and India are counted. Including only land area, the United States is third in size behind Russia and China, just ahead of Canada. The continental United States stretches from the Atlantic Ocean to the Pacific Ocean and from Canada to Mexico and the Gulf of Mexico. Alaska is the largest state in area. Separated by Canada, it touches the Pacific and Arctic Oceans. Hawaii occupies an archipelago in the Pacific, southwest of North America. The commonwealth of Puerto Rico, the largest and most populous U.S. territory, is in the northeastern Caribbean. With a few exceptions, such as the territory of Guam and the westernmost portions of Alaska, nearly all of the country lies in the western hemisphere.

Economy

The United States has a capitalist mixed economy, which is fueled by abundant natural resources, a well-developed infrastructure, and high productivity. According to the International Monetary Fund, the United States GDP of more than $13 trillion constitutes 20% of the gross world product. The largest national GDP in the world, it was slightly larger than the combined GDP of the European Union at purchasing power parity in 2006. The country ranks eighth in the world in nominal GDP per capita and fourth in GDP per capita at purchasing power parity. The United States is the largest importer of goods and second largest exporter. Canada, China, Mexico, Japan, and Germany are its top trading partners. The leading export commodity is electrical machinery, while vehicles constitute the leading import. The U.S. national debt is the world's largest; in 2005, it was 23% of the global total. As a percentage of GDP, U.S. debt ranked thirtieth out of 120 countries for which data is available.

The private sector constitutes the bulk of the economy, with government activity accounting for 12.4% of the GDP. The economy is postindustrial, with the service sector contributing over 75% of GDP. The leading business field by gross business receipts is wholesale and retail trade; by net income it is finance and insurance. The United States remains an industrial power, with chemical products the leading manufacturing field. The United States is the third largest producer of oil in the world, and its largest consumer. It is the world's number one producer of electrical and nuclear energy, as well as liquid natural gas, aluminum, sulfur, phosphates, and salt. Agriculture accounts for only 1% of GDP but 60% of the world's agricultural production. The country's leading cash crop is marijuana, despite federal laws making its cultivation and sale illegal.

Science and technology

The United States has been a leader in scientific research and technological innovation since the late nineteenth century, attracting immigrants such as Albert Einstein. The bulk of research and development funding, 64%, comes from the private sector. The United States leads the world in scientific research papers and impact factor. In 1876, Alexander Graham Bell was awarded the first patent for the telephone. The laboratory of Thomas Edison developed the phonograph, the first long-lasting light bulb, and the first viable movie camera. In the early twentieth century, the automobile companies of Ransom Olds and Henry Ford pioneered assembly line manufacturing. The Wright brothers, in 1903, made what is recognized as the "first sustained and controlled heavier-than-air powered flight." During World War II, the United States developed nuclear weapons, ushering in the atomic age. The space race produced rapid advances in rocketry, material science, computers, and many other areas. The United States largely developed the Arpanet and its successor, the Internet. Americans enjoy high levels of access to technological consumer goods. Almost half of U.S. households have broadband Internet service. The country is the primary developer and grower of genetically modified food; more than half of the world's land planted with biotech crops is in the United States.

Transportation
As of 2003, there were 759 automobiles per 1,000 Americans, compared to 472 per 1,000 inhabitants of the European Union the following year. Approximately 39% of personal vehicles are vans, SUVs, or light trucks. The average American adult (accounting for all drivers and nondrivers) spends 55 minutes behind the wheel every day, driving 29 miles (47 km). The U.S. intercity passenger rail system is relatively weak. Only 9% of total U.S. work trips employ mass transit, compared to 38.8% in Europe. Bicycle usage is minimal, well below European levels. The civil airline industry is entirely privatized, while most major airports are publicly owned. The five largest airlines in the world by passengers carried are all American; American Airlines is number one. Of the world's thirty busiest passenger airports, sixteen are in the United States, including the busiest, Hartsfield-Jackson Atlanta International Airport (ATL).

Demographics
On October 17, 2006, the United States population was estimated by the U.S. Census Bureau to be 300,000,000. The U.S. population included an estimated 12 million unauthorized migrants, of whom an estimated 1 million were uncounted by the Census Bureau. The overall growth rate is 0.89%, compared to 0.16% in the European Union. The birth rate of 14.16 per 1,000 is 30% below the world average, while higher than any European country except for Albania and Ireland.[120] In 2006, 1.27 million immigrants were granted legal residence. Mexico has been the leading source of new U.S. residents for over two decades; since 1998, China, India, and the Philippines have been in the top four sending countries every year. The United States is the only industrialized nation in which large population increases are projected.
 

The United States has a very diverse population—thirty-one ancestry groups have more than a million members. Whites are the largest racial group, with German Americans, Irish Americans, and English Americans constituting three of the country's four largest ancestry groups. African Americans, mostly descendants of former slaves, constitute the nation's largest racial minority and third largest ancestry group. Asian Americans are the country's second largest racial minority; the two largest Asian American ancestry groups are Chinese and Filipino. In 2005, the U.S. population included an estimated 4.5 million people with some Native American or Alaskan native ancestry (2.4 million exclusively of such ancestry) and nearly 1 million with some native Hawaiian or Pacific island ancestry (0.4 million exclusively).

Hispanic American population growth is a major demographic trend. The approximately 44 million Americans of Hispanic descent constitute the largest ethnic minority in the country. About 64% of Hispanic Americans are of Mexican origin. Between 2000 and 2004, the country's Hispanic population increased 14% while the non-Hispanic population rose just 2%. Much of this growth is due to immigration: As of 2004, 12% of the U.S. population was foreign-born, over half that number from Latin America. Fertility is also a factor: The average Hispanic woman gives birth to three children in her lifetime. The comparable fertility rate is 2.2 for non-Hispanic black women and 1.8 for non-Hispanic white women (below the replacement rate of 2.1). Hispanics accounted for nearly half of the national population growth of 2.9 million between July 2005 and July 2006. It is estimated on the basis of current trends that by 2050 whites of non-Hispanic origin will be 50.1% of the U.S. population, compared to 69.4% in 2000. They are already less than half the population in four "majority-minority states"—California, New Mexico, Hawaii, and Texas —as well as the District of Columbia.

About 83% of the population lives in one of the country's 361 metropolitan areas. In 2005, 254 incorporated places in the United States had populations over 100,000, nine cities had more than 1 million residents, and four global cities had over 2 million (New York City, Los Angeles, Chicago, and Houston). The United States has fifty metropolitan areas with populations greater than 1 million. Of the fifty fastest-growing metro areas, twenty-three are in the West and twenty-five in the South. Among the country's twenty most populous metro areas, those of Dallas (the fourth largest), Houston (sixth), and Atlanta (ninth) saw the largest numerical gains between 2000 and 2006, while that of Phoenix (thirteenth) grew the largest in percentage terms.


Language
Although the United States has no official language at the federal level, English is the national language.

In 2003, about 215 million, or 82% of the population aged five years and older, spoke only English at home. Spanish, spoken by over 10% of the population at home, is the second most common language and the most widely taught foreign language. Immigrants seeking naturalization must know English. Some Americans advocate making English the country's official language, as it is in at least twenty-eight states. Both Hawaiian and English are official languages in Hawaii by state law. Several insular territories also grant official recognition to their native languages, along with English: Samoan and Chamorro are recognized by Samoa and Guam, respectively; Carolinian and Chamorro are recognized by the Northern Mariana Islands; Spanish is an official language of Puerto Rico. While neither has an official language, New Mexico has laws providing for the use of both English and Spanish, as Louisiana does for English and French.


Religion

The United States government does not audit Americans' religious beliefs. In a private survey conducted in 2001, 76.7% of American adults identified themselves as Christian, down from 86.4% in 1990. Protestant denominations accounted for 52%, while Roman Catholics, at 24.5%, were the largest individual denomination. A different study describes white evangelicals, 26.3% of the population, as the country's largest religious cohort; evangelicals of all races are estimated at 30–35%. The total reporting non-Christian religions in 2001 was 3.7%, up from 3.3% in 1990. The leading non-Christian faiths were Judaism (1.4%), Islam (0.5%), Buddhism (0.5%), Hinduism (0.4%), and Unitarian Universalism (0.3%). Between 1990 and 2001, the number of Muslims and Buddhists more than doubled. From 8.2% in 1990, 14.2% in 2001 described themselves as agnostic, atheist, or simply having no religion, still significantly less than in other postindustrial countries such as Britain (44%) and Sweden (69%).

Education

American public education is operated by state and local governments, regulated by the United States Department of Education through restrictions on federal grants. Children are obliged in most states to attend school from the age of six or seven (generally, kindergarten or first grade) until they turn eighteen (generally bringing them through 12th grade, the end of high school); some states allow students to leave school at sixteen or seventeen. About 12% of children are enrolled in parochial or nonsectarian private schools. Just over 2% of children are home schooled. The United States has many competitive private and public institutions of higher education, as well as local community colleges of varying quality with open admission policies. Of Americans twenty-five and older, 84.6% graduated from high school, 52.6% attended some college, 27.2% earned a bachelor's degree, and 9.6% earned graduate degrees. The basic literacy rate is approximately 99%. The United Nations assigns the United States an Education Index of 99.9, tying it with twenty other nations for the top score.

Health
The American life expectancy of 77.8 years at birth is a year shorter than the overall figure in Western Europe, and three to four years lower than that of Norway and Switzerland. Over the past two decades, the country's rank in life expectancy has dropped from 11th to 42nd place in the world. The infant mortality rate of 6.37 per thousand likewise places the United States 42nd out of 221 countries, behind all of Western Europe. Approximately one-third of the adult population is obese and an additional third is overweight; the obesity rate, the highest in the industrialized world, has more than doubled in the last quarter-century. Obesity-related type 2 diabetes is considered epidemic by healthcare professionals. The U.S. adolescent pregnancy rate, 79.8 per 1,000 women, is nearly four times that of France and five times that of Germany. Abortion in the United States, legal on demand, is a source of great political controversy. Many states ban public funding of the procedure and have laws to restrict late-term abortions, require parental notification for minors, and mandate a waiting period prior to treatment. While the incidence of abortion is in decline, the U.S. abortion ratio of 241 per 1,000 live births and abortion rate of 15 per 1,000 women aged 15–44 remain higher than those of most Western nations.


Culture

The United States is a culturally diverse nation, home to a wide variety of ethnic groups, traditions, and values. The culture held in common by the majority of Americans is referred to as "mainstream American culture," a Western culture largely derived from the traditions of Western European migrants, beginning with the early English and Dutch settlers. German, Irish, and Scottish cultures have also been very influential. Certain Native American traditions and many cultural characteristics of enslaved West Africans were absorbed into the American mainstream. Westward expansion brought close contact with the culture of Mexico, and large-scale immigration in the late nineteenth and early twentieth centuries from Southern and Eastern Europe introduced many new cultural elements. More recent immigration from Asia and especially Latin America has had broad impact. The resulting mix of cultures may be characterized as a homogeneous melting pot or as a pluralistic salad bowl in which immigrants and their descendants retain distinctive cultural characteristics.


Food and clothing

Mainstream American culinary arts are similar to those in other Western countries. Wheat is the primary cereal grain. Traditional American cuisine uses ingredients such as turkey, white-tailed deer venison, potatoes, sweet potatoes, corn, squash, and maple syrup, indigenous foods employed by Native Americans and early European settlers. Slow-cooked pork and beef barbecue, crab cakes, potato chips, and chocolate chip cookies are distinctively American styles. Soul food, developed by African slaves, is popular around the South and among many African Americans elsewhere. Syncretic cuisines such as Louisiana creole, Cajun, and Tex-Mex are regionally important. Fried chicken, which combines Scottish and African American culinary traditions, is a national favorite. Iconic American dishes such as apple pie, pizza, hamburgers, and hot dogs derive from the recipes of various European immigrants. So-called French fries, Mexican dishes such as burritos and tacos, and pasta dishes freely adapted from Italian sources are widely consumed. During the last two decades of the twentieth century, Americans' daily caloric intake rose 24%, as the share from food consumed outside the home went from 18 to 32%. Frequent dining at fast food outlets such as McDonald's is closely associated with what government researchers call the American "obesity epidemic." The popularity of well-promoted diets such as the Atkins Nutritional Approach has sent sales of "carb-conscious" processed food soaring.

Sports
Since the late nineteenth century, baseball has been regarded as the national sport; football, basketball, and ice hockey are the country's three other leading professional team sports. College football and basketball also attract large audiences. Football is now by several measures the most popular spectator sport in the United States. Boxing and horse racing were once the most watched individual sports, but they have been eclipsed by golf and auto racing, particularly NASCAR. Soccer, though not a leading professional sport in the country, is played widely at the youth and amateur levels. Tennis and many outdoor sports are also popular.
 

While most major U.S. sports have evolved out of European practices, basketball was invented in 1891 by Dr. James Naismith in Springfield, Massachusetts, and the regionally popular lacrosse was a precolonial Native American sport. At the individual level, skateboarding and snowboarding are twentieth-century U.S. inventions, related to surfing, a Hawaiian practice predating Western contact. Eight Olympic Games have taken place in the United States, four summer and four winter. The United States has won 2,191 medals at the Summer Olympic Games, more than any other country, and 216 in the Winter Olympic Games, the second most. Several American athletes have become world famous, in particular baseball player Babe Ruth, boxer Muhammad Ali, basketball player Michael Jordan, and golfer Tiger Woods.


States
The United States is a federal union of fifty states. The original thirteen states were the successors of the thirteen colonies that rebelled from British rule. Most of the rest have been carved from territory obtained through war or purchase by the U.S. government. The exceptions are Vermont, Texas, and Hawaii; each was an independent republic before joining the union. Apart from the temporary secessions of the southern states during the American Civil War, the number of states has never shrunk. Early in the country's history, three states were created out of the territory of existing ones: Kentucky from Virginia; Tennessee from North Carolina; and Maine from Massachusetts. West Virginia broke away from Virginia during the Civil War. Otherwise, state borders have been largely stable; the only major exceptions are cessions by Maryland and Virginia to create the District of Columbia (Virginia's portion was later returned); a cession by Georgia; and expansions by Missouri and Nevada. The most recent state—Hawaii—achieved statehood on August 21, 1959.

The states comprise the vast bulk of U.S. territory; the only other areas considered integral parts of the country are the District of Columbia, the federal district where the capital, Washington, is located; and Palmyra Atoll, an uninhabited but incorporated territory in the Pacific Ocean.
( Source: http://en.wikipedia.org/wiki/United_States ) 
 

Educational System in the United States of America ( USA )

Higher Education in the USA

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