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Rocky Mountains
A major mountain system of the united states and Canada, extending 3,000 miles from Alaska south to New Mexico.
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Romania
Location: Southeast Europe Official name: Romania Formation (date of independence / date current borders were established): 1878 / 1947 Capital city: Bucharest Population: 21.2 million / 238 people per sq mile (92 people per sq km) Total land area: 91,699 square miles (237,500 square km) Language(s) spoken: Romanian (official language), Hungarian (Magyar), Romani, German Main …
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Rub al Khali
Also known as the empty quarter. One of the world’s largest sandy deserts covers about 250,000 square miles (647,497 square km). Located on the Arabian peninsula.
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Runoff
Rainfall is not absorbed by the soil, carrying pesticides and fertilizers from fields into rivers, endangering the food chain.
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Russia
Location: Europe / Asia Official name: Russian Federation Formation (date of independence / date current borders were established): 1480 / 1991 Capital city: Moscow Population: 140 million / 21 people per sq mile (8 people per sq km) Total land area: 6,592,735 square miles (17,075,200 square km) Language(s) spoken: Russian (official language), Tatar, Ukrainian, Chavash, …
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Russian revolution
The revolt of 1917, in which the Russian communist party, led by V. I. Lenin, took control of the government from the czars.
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Russification
The effort, particularly under the Soviets, to implant Russian culture in non-Russian regions of the former Soviet Union and its Eastern European neighbors.
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Rwanda
Location: Central Africa Official name: Republic of Rwanda Formation (date of independence / date current borders were established): 1962 / 1962 Capital city: Kigali Population: 10.3 million / 1069 people per sq mile (413 people per sq km) Total land area: 10,169 square miles (26,338 square km) Language(s) spoken: Kinyarwanda (official language), French, Kiswahili, English …