1. Soil erosion has become a serious problem affecting the water quality in parts of a watershed whose main river flows through Ukraine to the Black Sea. Name the major river.
2. The major river of a watershed in southern Africa begins as the Crocodile River in the northern slopes of the Witwatersrand and empties into the Indian Ocean. Name the major river.
3. Several nuclear power plants can be found in a European watershed whose main river rises in Switzerland and empties into the Gulf of Lion. Name the major river.
4. The urban population of Ghana depends on hydroelectricity generated by the major river of a watershed in West Africa. Name the major river.
5. The major river of a watershed in South America generates hydroelectric power at Itaipu Dam before joining the Iguaçu River. Name the major river.
6. A natural-gas pipeline project may threaten the ecosystem of a watershed whose main river flows from the Great Slave Lake to the Arctic Ocean. Name the major river.
7. The main river of a European watershed provides irrigation along part of its route from the Cantabrian Mountains to the Mediterranean Sea. Name the major river.
8. The major river of an Asian watershed that has recently been affected by a chemical spill forms more than 1,000 miles of the border between Russia and China. Name the major river.
9. The major river of a watershed on the Iberian Peninsula forms a large estuary before emptying into the Atlantic Ocean near Lisbon. Name the major river.
10. Tin, mined in such towns as Oruro and Potosí, is a major metallic mineral export of which Andean country?
ANSWERS: 1. Dnieper River 2. Limpopo River 3. Rhône River 4. Volta River 5. Paraná River 6. Mackenzie River 7. Ebro River 8. Amur River 9. Tagus River 10. Bolivia
National Geographic Bee, National Geographic Society
