Columbia Encyclopedia

Search results

500 results found

Balkash, lake, Kazakhstan

(Encyclopedia)Balkash, lake, 6,562 sq mi (16,996 sq km), c.350 mi (560 km) long, maximum width c.45 mi (70 km), in E Kazakhstan. The lake, which has an average depth of 20 ft (6 m), stretches from the Kazakh Upland...

Buchans

(Encyclopedia)Buchans, town, central Newfoundland, N.L., Canada, on Red Indian Lake. It has a large mine that yields lead, silver, zinc, and copper. ...

voltaic cell

(Encyclopedia)voltaic cell, a simple device with which chemical energy is converted into electrical energy. Two dissimilar metals (e.g., copper and zinc) are immersed in an electrolyte (e.g., a dissolved sulfate). ...

Buttle Lake

(Encyclopedia)Buttle Lake, 11 sq mi (28 sq km), central Vancouver Island, SW British Columbia, Canada. It is the site of major zinc and copper deposits. ...

Bronze Age

(Encyclopedia)Bronze Age, period in the development of technology when metals were first used regularly in the manufacture of tools and weapons. Pure copper and bronze, an alloy of copper and tin, were used indiscr...

nickel

(Encyclopedia)nickel, metallic chemical element; symbol Ni; at. no. 28; at. wt. 58.6934; m.p. about 1,453℃; b.p. about 2,732℃; sp. gr. 8.902 at 25℃; valence 0, +1, +2, +3, or +4. Nickel is a hard, malleable, ...

Carteret

(Encyclopedia)Carteret, borough (2020 pop. 25,326), Middlesex co., NE N.J., on Arthur Kill, opposite Staten Island; inc. 1906. It has oil and copper refineries and in...

Bordeaux mixture

(Encyclopedia)Bordeaux mixture bôrdōˈ [key], fungicide consisting of cupric sulfate and lime in water. Its fungicidal activity is associated with the slow formation of copper compounds, the ultimate toxicant bei...

Bisbee

(Encyclopedia)Bisbee bĭzˈbē [key], city (2020 pop. 4,923), seat of Cochise co., SE Ariz., near the Mexic...

Copperbelt

(Encyclopedia)Copperbelt, mining region, N central Zambia, central Africa. A natural extension of the mineral-rich region of SE Congo, the Copperbelt is one of the richest sources of copper in the world. Cobalt, se...