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geology
(Encyclopedia) geology, science of the earth's history, composition, and structure, and the associated processes. It draws upon chemistry, biology, physics, astronomy, and mathematics (notably…volcano
(Encyclopedia) volcano, vents or fissures in the earth's crust through which gases, molten rock, or lava, and solid fragments are discharged. Their study is called volcanology. The term volcano is…ocean
(Encyclopedia) ocean, interconnected mass of saltwater covering 70.78% of the surface of the earth, often called the world ocean. It is subdivided into four (or five) major units that are separated…Africa
(Encyclopedia) CE5 AfricaAfricaăfˈrĭkə [key], second largest continent (2015 est. pop. 1,194,370,000), c.11,677,240 sq mi (30,244,050 sq km) including adjacent islands. Broad to the north (c.4,600…Trending
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