美国地理英语

The total land area of the contiguous United States is approximately 1.9 billion acres. Alaska, separated from the contiguous United States by Canada, is the largest state at 365 million acres. Hawaii, occupying an archipelago in the central Pacific, southwest of North America, has just over 4 million acres.[17] After Russia and Canada, the United States is the world's third or fourth largest nation by total area, ranking just above or below China. The ranking varies depending on how two territories disputed by China and India are counted and how the total size of the United States is calculated: the CIA World Factbook gives 3,794,083 sq mi (9,826,630 km2),[1] the United Nations Statistics Division gives 3,717,813 sq mi (9,629,091 km2),[18] and the Encyclopedia Britannica gives 3,676,486 sq mi (9,522,055 km2).[19] Including only land area, the United States is third in size behind Russia and China, just ahead of Canada.[20]The Teton Range, part of the Rocky MountainsThe coastal plain of the Atlantic seaboard gives way further inland to deciduous forests and the rolling hills of the Piedmont. The Appalachian Mountains divide the eastern seaboard from the Great Lakes and the grasslands of the Midwest. The Mississippi–Missouri River, the world's fourth longest river system, runs mainly north–south through the heart of the country. The flat, fertile prairie of the Great Plains stretches to the west, interrupted by a highland region in the southeast. The Rocky Mountains, at the western edge of the Great Plains, extend north to south across the country, reaching altitudes higher than 14,000 feet (4,300 m) in Colorado. Farther west are the rocky Great Basin and deserts such as the Mojave. The Sierra Nevada and Cascade mountain ranges run close to the Pacific coast. At 20,320 feet (6,194 m), Alaska's Mount McKinley is the country's tallest peak. Active volcanoes are common throughout Alaska's Alexander and Aleutian Islands, and Hawaii consists of volcanic islands. The supervolcano underlying Yellowstone National Park in the Rockies is the continent's largest volcanic feature.

The United States is located in southern North America, east to the Atlantic, West Pacific, north of Canada, South to Mexico and the Gulf of Mexico. The whole territory from east to west can be divided into 5 geographical regions: the coastal plain in southeastern coastal plain is divided into two parts of the Atlantic and Mexico coastal plain. This is an area of at an elevation of 200 meters below, the majority formed by the alluvial rivers, especially the Mississippi River Delta, Delta, the world's largest soil and oil, fertile soil. There are some swamps near the mouth of the river. Located in the geographical area of the Florida Peninsula is the United States of America's largest peninsula.The Appalachian Mountains located in the west of the Atlantic coastal plain, basic parallel with the coast, more than 2300 km long, the general elevation of 1000 ~ 1500 meters, composed of several parallel mountains. The plain was inverted triangle, long North American and Canadian border, south the Atlantic Coastal Plains along the Rio Grande river. Western mountains from the west is composed of two mountains, east of Rocky Mountains, west of the Sierra Nevada mountains and the cascade mountains. A product of the old fold after exercise. Whitney Nevada mountain peak 4418 meters above sea level, as the United States, the highest point, the Cascade Mountains of Mount Rainier 4392 meters, after Whitney peak. Western mountain plateau by the Colorado plateau, Wyoming plateau, Columbia Plateau and the Grand Canyon, the most complex geological structure in the western region of the United States of america. The Grand Canyon is located in the northwest part of Arizona, a series with many twists and turns, perplexing and deep valley gorge, the momentum of the majestic, steep rock wall, as the world's rare natural landscape. The United States has numerous rivers and lakes, water complex, in general can be divided into three major river systems: where is located in the east of the rocky mountains into the the Atlantic River are called the Atlantic river system, mainly in the Mississippi River, Connecticut River and the Hudson river. The Mississippi River is full-length 6020 kilometers, ranking third in the world. Where a river called into the Pacific Ocean water. Mainly in the Colorado River, Columbia River, Yukon etc.. North America east of the Great Lakes group. Including Lake Superior, Lake Michigan, Lake Huron, Lake Erie and lake Ontario, a total area of 245000 square kilometers, is the world's largest freshwater, known as the "North American Mediterranean", the Michigan lake is the United States of America, the other 4 Lake as the United States and canada. Lake Superior is the world's largest freshwater lake, the lake area in the world only to the Caspian Sea and ranked the second in the world.In most parts of the United States of America's climate is temperate and subtropical climate, only the tip of the Florida Peninsula tropical. Northern California is located in north latitude 60 to 70 degrees, is the cold Arctic climate zone; Hawaii Prefecture is located to the south of the Tropic of cancer, is a tropical climate zone. But because the United States has a vast territory, complicated terrain, different climate. Can be divided into 5 climatic zones: the northeast coast temperate climate zone. This area because of the impact, the Labrador Current and the cold northern winter, the average January temperature is -6 ℃, mild and rainy in summer, in July the average temperature is about 16 ℃. Average annual precipitation is about 1000 mm. Southeast subtropical climate zone. Because of the influence of Mexico gulf stream, warm and humid climate, the average January temperature is 96 ℃, the average July temperature of 24 ~ 27 ℃, the average annual rainfall of 1500 mm. Central Plains continental climate zone. This area is characteristic of the climate, the winter cold, in January, the average temperature of -14 ℃, hot summer, the average temperature in July up to 27 ~ 32 ℃. Average annual precipitation is 1000 ~ 1500 mm. The western plateau dry climate zone. The regional inland climate, large temperature difference between the plateau last year, Colorado plateau temperature up to 25 ℃. The average annual precipitation 500 mm below the desert plateau, less than 250 mm of precipitation. Along the coast of the Pacific Ocean Climate zone. Winter in the region, with plenty of rainfall. In January the average temperature over 4 ℃, the average July temperature of 20 ~ 22 ℃. Average annual precipitation is about 1500 mm.The United States agricultural, mineral and forest resources play a decisive role, plays a role in the world. The United States of America's geographical location, climate and terrain structure is be richly endowed by nature. The United States agricultural land (cultivated land and pasture) of about 430000000 hectares, accounting for all of earth agriculture with around 10%. Abundant rainfall, fertile soil, of the world's total grain output of 1/5, the main agricultural products such as wheat, corn, soybean, cotton, meat production ranks first in the world.The United States is rich in mineral resources, iron ore, coal, natural gas, lead, zinc, silver, molybdenum, zirconium, uranium output occupies the world front row, but strategic resources such as titanium, manganese, tin, cobalt, chromium, nickel, mainly rely on imports. The total coal reserves of 35996 tons, the total oil reserves of about 24000000000 tons, natural gas reserves of 5603400000000 cubic meters.The United States has 1800000000 hectares of forest, accounted for about 31.5% of the total land area, the main tree species are pine, ponderosa pine, American white pine and oak class.

he United States of America is a federal nation comprising fifty states. The country is situated in central North America, where its forty-eight contiguous states and Washington, D.C., the capital district, lie between the Pacific and Atlantic Oceans. The state of Alaska is in the northwest of the continent, with Canada to its east and Russia to the west across the Bering Strait. The state of Hawaii is in the mid-Pacific. The country also possesses several territories around the Caribbean and Pacific.With more than 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 and multicultural nations, the product of large-scale immigration from many countries.The U.S. economy is the largest national economy in the world.