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The topography of the United States is varied, with high terrain in the west and low terrain in the east. There are coastal plains on the east coast, which are wide in the south and narrow in the north, extending to New Jersey and Long Island, and there are also some glacial sedimentary plains.

Behind the coastal plain is a hilly area with undulating terrain, extending all the way to the Appalachian Mountains in North Carolina and New Hampshire, with an altitude of 1, 830 meters.

To the west of the Appalachian Mountains is the central plain of the United States, with relatively flat terrain. The Great Lakes and the Mississippi-Missouri River Basin are also located here.

To the west of the Mississippi River, the topography of the internal plain began to rise, and finally it entered the great plain with a vast area and few topographical features in the central United States.

In the west of the Great Plains, there is the majestic Rocky Mountains, which bisects the American mainland from south to north, with the highest peak of 4,270 meters in Colorado. There are Sierra Nevada and coastal mountains on the west coast.

There used to be volcanic activity in the Rocky Mountains. There is only one area left (the super volcano in Yellowstone National Park, Wyoming-probably the largest active volcano in the world). The highest mountain in the United States is Mount McKinley, which is 6 193 meters above sea level and the highest peak in North America.

Some parts of the United States have a continental climate, while the south has a subtropical climate. There is a great temperature difference between the central and northern plains. The average temperatures in Chicago in June are -3℃ and 24℃ in July, and those in the Gulf Coast in July are 65,438+065,438+0℃ and 28℃.

The United States is rich in natural resources, and the total proven reserves of mineral resources rank first in the world. Coal, oil, natural gas, iron ore, potassium salt, phosphate, sulfur and other mineral reserves rank among the top in the world.

Other minerals are copper, lead, molybdenum, uranium, bauxite, gold, mercury, nickel, potassium carbonate, silver, tungsten, zinc, aluminum and bismuth. Strategic mineral resources such as titanium, manganese, cobalt and chromium mainly rely on imports. The forest area is about 4.4 billion mu, with a coverage rate of 33%.