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chemistry

(Encyclopedia)chemistry, branch of science concerned with the properties, composition, and structure of substances and the changes they undergo when they combine or react under specified conditions. Organic chemi...

Chad

(Encyclopedia)CE5 Chad chăd, chäd [key], officially Republic of Chad, republic (2020 est. pop. 16,425,864), ...

China

(Encyclopedia)CE5 CE5 China, Mandarin Zhonghua Renmin Gongheguo [central glorious people's united country; i.e., people's republic], officially People's Repu...

Afghanistan

(Encyclopedia)CE5 Afghanistan ăfgănˈĭstănˌ, ăfgänˌĭstänˈ [key], officially Islamic Republic of Afghanistan, republic (2020 est. pop. 38,930,000), 249,999 sq mi (6...

Mali

(Encyclopedia)CE5 Mali mäˈlē [key], officially Republic of Mali, independent republic (2015 est. pop. 17,468,000), 478,764 sq mi (1,240,000 sq km), the largest country in W Africa. Mali is bordered on the nor...

strategy and tactics

(Encyclopedia)strategy and tactics, in warfare, related terms referring, respectively, to large-scale and small-scale planning to achieve military success. Strategy may be defined as the general scheme of the condu...

Tunisia

(Encyclopedia)CE5 Tunisia to͞onēˈzhə, tyo͞o– [key], Fr. Tunisie, officially Republic of Tunisia, republic (2015 est. pop. 11,274,000), 63,378 sq mi (164,150 sq km), NW Africa. Occupying the eastern portio...

Afroasiatic languages

(Encyclopedia)Afroasiatic languages hămˈĭtō-səmĭtˈĭk [key], family of languages spoken by more than 250 million people in N Africa; much of the Sahara; parts of E, central, and W Africa; and W Asia (especia...

sculpture

(Encyclopedia)sculpture, art of producing in three dimensions representations of natural or imagined forms. It includes sculpture in the round, which can be viewed from any direction, as well as incised relief, in ...

Siberia

(Encyclopedia)Siberia sībērˈēə [key], Rus. Sibir, vast geographical region of Russia, covering c.2,900,000 sq mi (7,511,000 sq km) and having an estimated population (1992) of 32,459,000. Historically it has h...