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tide

(Encyclopedia) tide, alternate and regular rise and fall of sea level in oceans and other large bodies of water. These changes are caused by the gravitational attraction of the moon and, to a lesser…

The Top Ten: States with Longest Coastlines

December 10 - 17 States with Longest Coastlines RankStateBodies of WaterMiles—General Coastline1. Alaska Pacific/Arctic 6,640 2. Florida Atlantic/Gulf 1,350 3. California Pacific…

Principal Rivers of the World

The following table lists the principal rivers of the world including the name, source location, outflow, and approximate length. The Nile is the world's longest river stretching 6,690…

Homework Center: World Geography

Subjects » Geography » History » Language Arts » Mathematics » Science » Social Studies Homework Skills Writing | Research Speaking & Listening Studying Reference Sources…

seal, in zoology

(Encyclopedia) seal, carnivorous aquatic mammal with front and hind feet modified as flippers, or fin-feet. The name seal is sometimes applied broadly to any of the fin-footed mammals, or pinnipeds,…

sirenian

(Encyclopedia) sireniansireniansīrēˈnēən [key] or sea cow, name for a large aquatic mammal of the order Sirenia. Living sirenians are the dugong and the manatee, both found in warm, shallow waters in…

Labrador-Ungava

(Encyclopedia) Labrador-UngavaLabrador-Ungavalăbˈrədôrˌ-əngāˈvə, –əngävˈə [key], peninsular region of E Canada, c.550,000 sq mi (1,424,500 sq km), bounded on the W by Hudson Bay, on the N by Hudson…

Orinoco

(Encyclopedia) OrinocoOrinocoōrēnōˈkō [key], river of Venezuela, estimated to be from 1,500 to 1,700 mi (2,410–2,735 km) long. Rising near Mt. Delgado Chalbaud in the Guiana Highlands, S Venezuela,…