convectional current

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• Convectional precipitation — describes rainfall that is produced when convectional currents form in the atmosphere. When the earth s surface is heated, as on hot summer days, the temperature of the air above it increases. Heated air rises, forming an updraft. The rising air… …   Wikipedia

• climate — /kluy mit/, n. 1. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. 2. a region or… …   Universalium

• river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… …   Universalium

• United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …   Universalium

• Ecuador — Ecuadoran, Ecuadorean, Ecuadorian, adj., n. /ek weuh dawr /, n. a republic in NW South America. 11,690,535; 109,483 sq. mi. (283,561 sq. km). Cap.: Quito. * * * Ecuador Introduction Ecuador Background: The Republic of the Equator was one of three …   Universalium

• Florence — Firenze and Florentine redirect here. For other uses, see Florentin, Florentine (disambiguation), Florence (disambiguation) or Firenze (disambiguation). Florence Firenze   Comune   …   Wikipedia

• Eastern Highlands (Papua New Guinea) — Infobox Papua New Guinea Province name = Eastern Highlands othername = districts = Daulo District Goroka District Henganofi District Kainantu District Lufa District Obura Wonenara District Okapa District Unggai Bena District flag capital = Goroka …   Wikipedia

• Papua New Guinea — an independent republic in the W Pacific Ocean, comprising the E part of New Guinea and numerous near lying islands, including the Bismarck Archipelago, the Admiralty Islands, the Trobriand Islands, and Bougainville and Buka in the Solomon… …   Universalium

• Sahara — Saharan, Saharian, adj. /seuh har euh, hair euh, hahr euh/, n. 1. a desert in N Africa, extending from the Atlantic to the Nile valley. ab. 3,500,000 sq. mi. (9,065,000 sq. km). 2. any arid waste. * * * Largest desert in the world, encompassing… …   Universalium

• Southeast Asia — Southeast Asian. the countries and land area of Brunei, Burma, Cambodia, Indonesia, Laos, Malaysia, the Philippines, Singapore, Thailand, and Vietnam. * * * Vast region of Asia lying east of the Indian subcontinent and south of China. It includes …   Universalium

• convection — n. 1 transference of heat in a gas or liquid by upward movement of the heated and less dense medium. 2 Meteorol. the transfer of heat by the upward flow of hot air or downward flow of cold air. Phrases and idioms: convection current circulation… …   Useful english dictionary