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Sumatra

(Encyclopedia)Sumatra so͝omäˈtrə [key], island (1990 pop. 36,471,731), c.183,000 sq mi (473,970 sq km), Indonesia, in the Indian Ocean along the equator, S and W of the Malay Peninsula (from which it is separat...

İstanbul

(Encyclopedia)İstanbul ĭsˌtănbo͞olˈ, ĭstanˈbo͞ol [key], city and metropolitan muncipality,...

space station

(Encyclopedia)space station or space platform, artificial earth satellite, usually manned, that is placed in a fixed orbit and can serve as a base for astronomical observations; zero-gravity materials processing; s...

New Zealand

(Encyclopedia)CE5 New Zealand zēˈlənd [key], island country (2015 est. pop. 4,615,000), 104,454 sq mi (270,534 sq km), in the S Pacific Ocean, over 1,000 mi (1,600 km) SE of Australia. The capital is Wellingt...

Java

(Encyclopedia)Java jäˈvə [key], island (1990 pop. 107,525,520), c.51,000 sq mi (132,090 sq km), Indonesia, S of Borneo, from which it is separated by the Java Sea, and SE of Sumatra across Sunda Strait. Although...

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 extent, of the s...

Sparta

(Encyclopedia)Sparta spärˈtə [key], city of ancient Greece, capital of Laconia, on the Eurotas (Evrótas) River in the Peloponnesus. By the 6th cent. b.c., Sparta was the strongest Greek city. In the Persian ...

wave, in the earth sciences

(Encyclopedia)CE5 A. Diagram of wave: Wave travels one wavelength during one period B. Diagram of wave: Phase relationships wave, in oceanography, an oscillating movement up and down, of a body of water caused ...

Tokyo

(Encyclopedia)Tokyo tōˈkēō [key], city (1990 pop. 8,163,573), capital of Japan and of Tokyo prefecture, E central Honshu, at the head of Tokyo Bay. The Tokyo-Yokohama metropolitan area is the world's most popul...

nuclear reactor

(Encyclopedia)CE5 Power reactor system nuclear reactor, device for producing controlled release of nuclear energy. Reactors can be used for research or for power production. A research reactor is designed to pr...