Landscape. Major rivers, lakes and waterfalls in the United States.

The U.S.A. is divided into three areas: Eastern area — highland with the Appalachian Mountains, Central area — plain, and Western mountainous area including the Cordilleras and the Rocky Mountains. Between the mountain ranges are the central lowlands, called the prairie, and the Eastern Lowlands, called the Mississippi Valley. The geography of the United States is extremely diverse. The Rocky Mountains in the West can reach over 14,440 feet (4,401 meters) high, but the land of the Great Plains stretches flat for hundreds of miles. Large reserves of coal, oil, gas, iron ores, ferrous and non-ferrous metals form a solid base for the development of the U.S.A. industry.

The north-eastern part of the U.S.A. is the region of the five Great Lakes — Lake Superior, Huron, Michigan, Erie and Ontario. The largest is Superior. The lakes are joined together by short rivers and canals and cut by rapids. The greatest of these rapids is the Niagara Falls. It is one of the largest waterfalls in the world. The waters of the five lakes have the outlet into the Atlantic Ocean by the St. Lawrence River. In the west of the U.S.A. there is another lake called the Great Salt Lake.

The greatest rivers of the U.S.A. are the Colorado and the Columbia flowing into the Pacific Ocean, the Mississippi with its tributaries — the Missouri and the Ohio — flowing into the Gulf of Mexico, and the Hudson river, which flows into the Atlantic Ocean. The rivers in the west are unsuitable for navigation as they are cut by deep rapids. They serve as a great source of electric power.

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The geographical position and the territory of the USA. The national capital. The US national symbols (the national anthem, the national flag, the national bird).	\|	Climate. Plant and animal life.

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