A river is a flowing（流动的）, moving stream of water. Usually a river feeds water into an ocean, lake, pond, or even another river. Rivers can differ in size and there is no strict rule on how big a flow of water must be to be called as a river. Here are the five longest rivers in the world.
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| The Nile River The Nile River is4, 135 miles long. It is located in the continent of Africa, mostly in the countries of Egypt and Sudan. It flows north into the Mediterranean Sea. |
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| The Amazon River The Amazon River is 3, 980 miles long. It is located in the continent of South America and flows through several countries including Brazil, Venezuela, Bolivia, and Ecuador. It ends at the Atlantic Ocean. |
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| The Yangtze River Located in China, the Yangtze River is 3, 917 miles long and flows into the East China Sea. |
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| The Mississippi River and the Missouri River The river system of the Mississippi River and the Missouri River is the longest river system in North America at 3, 902 miles. It flows south into the Gulf of Mexico. |
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| The Yenisei River The Yenisei River starts in Mongolia and flows through Russia to the Kara Sea in the Arctic Ocean. It's 3, 445 miles long. |
There are 76 rivers in the world over 1.000 miles long. A lot of people think that rivers always flow south, but 4of the 10 longest rivers in the world flow north. The United States alone has around 3.5 million miles of rivers. Four of the top 10 longest rivers flow through China at some point.
