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earth, in geology and astronomy

(Encyclopedia)CE5 A. Cross section of the earth, showing its shells B. Detailed cross section of the crust and upper mantle: The lithosphere consists of the hard rock in the crust and upper mantle, lying above t...

Mars, in astronomy

(Encyclopedia)Mars, in astronomy, 4th planet from the sun, with an orbit next in order beyond that of the earth. Mars has two natural satellites, discovered by Asaph Hall in 1877. The innermost of these, Phobos...

time , sequential arrangement of all events

(Encyclopedia)time, sequential arrangement of all events, or the interval between two events in such a sequence. The concept of time may be discussed on several different levels: physical, psychological, philosophi...

geography

(Encyclopedia)geography, the science of place, i.e., the study of the surface of the earth, the location and distribution of its physical and cultural features, the areal patterns or places that they form, and the ...

Gambia, The, country, Africa

(Encyclopedia)CE5 Gambia, The gămˈbēə, gämˈ– [key], officially Republic of The Gambia, republic (2015 est. pop. 1,978,000), 4,361 sq mi (11,295 sq km), W Africa. It is bordered by the Atlantic Ocean on t...

Hawaii, state, United States

(Encyclopedia)CE5 Hawaii həwīˈē, häväˈē [key], 50th state of the United States, comprising a group of eight major islands and numerous islets in the central Pacific Ocean, c.2,100 mi (3,380 km) SW of San...

solar system

(Encyclopedia)CE5 Solar system CE5 solar system, the sun and the surrounding planets, natural satellites, dwarf planets, asteroids, meteoroids, and comets that are bound by its gravity. The sun is by far the ...

children's literature

(Encyclopedia)children's literature, writing whose primary audience is children. See also children's book illustration. The contributions and innovations of the 19th cent. continued into the 20th cent., achieving...

Liberia

(Encyclopedia)CE5 Liberia lībērˈēə [key] [New Lat.,=place of freedom], officially Republic of Liberia, republic (2015 est. pop. 4,500,000), 43,000 sq mi (111,370 sq km), W Africa. Liberia fronts on the Atla...

Uruguay , country, South America

(Encyclopedia)CE5 Uruguay yo͝oˈrəgwā, gwī, Span. o͞oro͞ogwiˈ, o͞oro͞owīˈ [key], officially Oriental Republic of Uruguay, republic (2015 est. pop. 3,432,000), 68,536 sq mi (177,508 sq km), SE South Am...