The Nile River is the longest river in the world, stretching about 4,132 miles (6,650 kilometers). It flows northward through northeastern Africa, passing through 11 countries, and empties into the Mediterranean Sea. The Nile was crucial to the development of ancient Egyptian civilization. Which river is the longest in the world?

The Amazon River is the largest river in the world by volume of water discharged (about 209,000 cubic meters per second). It is also the second-longest river (about 4,000 miles / 6,400 kilometers). The Amazon flows through South America, primarily Brazil, Peru, and Colombia. It discharges into the Atlantic Ocean. Which river carries the most water?

The Yangtze River (Chang Jiang) is the longest river in Asia and the third-longest in the world (about 3,915 miles / 6,300 kilometers). It flows through China from the Tibetan Plateau to the East China Sea. The Three Gorges Dam on the Yangtze is the world's largest hydroelectric power station. Which river is the longest in Asia?

The Mississippi-Missouri River system is the longest river system in North America (about 3,902 miles / 6,275 kilometers). The Mississippi River flows from Minnesota to the Gulf of Mexico. The Missouri River is a tributary of the Mississippi. Which river is the longest in North America?

The Yenisei River is the largest river system flowing into the Arctic Ocean. It is the fifth-longest river in the world (about 3,445 miles / 5,539 kilometers). It flows through Mongolia and Russia (Siberia). Which river is the largest flowing into the Arctic Ocean?

The Congo River is the deepest river in the world (over 720 feet / 220 meters deep in some places). It is also the second-largest river by volume (after the Amazon). It flows through central Africa, primarily the Democratic Republic of the Congo. Which river is the deepest?

The Yellow River (Huang He) is the second-longest river in China (after the Yangtze). It is called the "Cradle of Chinese Civilization" because the earliest Chinese dynasties developed along its banks. The river gets its name from the yellowish silt (loess) it carries. What is the Chinese name for the Yellow River?

The Indus River is the longest river in Pakistan. It flows from the Tibetan Plateau through India and Pakistan to the Arabian Sea. The Indus Valley Civilization (Harappa and Mohenjo-Daro) was one of the world's earliest urban civilizations (c. 2600-1900 BCE). Which river was the cradle of the Indus Valley Civilization?

The Rhine River is one of the most important rivers in Europe. It flows from the Swiss Alps through Germany and the Netherlands to the North Sea. The Rhine is a major transportation route for goods (coal, oil, chemicals). It passes through the famous Rhine Gorge (UNESCO World Heritage site) with its many castles. Which river flows through the Rhine Gorge?

The Danube River is the second-longest river in Europe (after the Volga). It flows through 10 countries: Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania, Moldova, and Ukraine. The Danube flows through four capital cities: Vienna (Austria), Bratislava (Slovakia), Budapest (Hungary), and Belgrade (Serbia). How many capital cities does the Danube flow through?