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Ohio, river, United States
(Encyclopedia)Ohio, river, 981 mi (1,579 km) long, formed by the confluence of the Allegheny and Monongahela rivers in SW Pa., at Pittsburgh; it flows northwest, then generally southwest to enter the Mississippi Ri...Chechnya
(Encyclopedia)Chechnya chəchĕnˈ [key], republic (1990 est. pop. 1,300,000, with neighboring Ingushetia), c.6,100 sq mi (15,800 sq km), SE European Russia, in the N Caucasus. Grozny is the capital. Prior to 1992 ...helium
(Encyclopedia)helium hēˈlēəm [key], gaseous chemical element; symbol He; at. no. 2; at. wt. 4.0026; m.p. below −272℃ at 26 atmospheres pressure; b.p. −268.934℃ at 1 atmosphere pressure; density 0.1785 g...jazz
(Encyclopedia)jazz, the most significant form of musical expression of African-American culture and arguably the most outstanding contribution the United States has made to the art of music. ...Punjab
(Encyclopedia)Punjab pŭnˌjäbˈ [key] [Pers.,=five rivers], historic region in the NW of the Indian subcontinent. Since 1947 it has been separated into an Indian state and a Pakistani province bearing the same na...seaweed
(Encyclopedia)seaweed, name commonly used for the multicellular marine algae. Simpler forms, consisting of one cell (e.g., the diatom) or of a few cells, are not generally called seaweeds; these tiny plants help to...Tennessee Valley Authority
(Encyclopedia)Tennessee Valley Authority (TVA), independent U.S. government corporate agency, created in 1933 by act of Congress; it is responsible for the integrated development of the Tennessee River basin. The h...Northern War
(Encyclopedia)Northern War, 1700–1721, general European conflict, fought in N and E Europe at the same time that the War of the Spanish Succession was fought in the west and the south. It arose chiefly from the d...Pacific Ocean
(Encyclopedia) CE5 Pacific Ocean, largest and deepest ocean, c.70,000,000 sq mi (181,300,000 sq km), occupying about one third of the earth's surface; named by the explorer Ferdinand Magellan; the southern part i...Atlantic Ocean
(Encyclopedia) CE5 Atlantic Ocean [Lat.,=of Atlas], second largest ocean (c.31,800,000 sq mi/82,362,000 sq km; c.36,000,000 sq mi/93,240,000 sq km with marginal seas). The North Atlantic Ocean has some of the w...Browse by Subject
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