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A dam began in the late 20th century on the Chang Jiang in China to help control flooding, generate power, and allow ships to sail farther into China.
The kingdoms formed in Korea’s peninsula by a.d. 300-Koguryo in the northeast, paekche in the southwest, and Silla in the southeast.
A Latin American climatic zone reaching from sea level upward to approximately 3,000 feet (914 m).
A Latin American climatic zone found between 6,000 feet (1,800 m) and 12,000 feet (3,600 m) above sea level.
A Latin American climatic zone above 10,000 feet (3,048 m) has little vegetation and frequent snow cover.
A Latin American climatic zone extending from approximately 3,000 to 6,000 feet (914-1,829 m) above sea level.
One of the most important rivers of southwest Asia. It supported several ancient river valley civilizations and flowed through parts of Turkey, Syria, and Iraq.
A time zone is an area that observes a uniform standard time for legal, commercial, and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude because it is convenient for frequent communication areas to keep the same time.
Shogunate The period 1600 to 1868 in Japan, characterized by a feudal hierarchy and Japan’s isolation from the outside world.
A general reference map. A representation of natural and human-made features on the earth.
The combined characteristics of landforms and their distribution in a region.
A powerful funnel-shaped column of spiraling air.
The total fertility rate gives a figure for the average number of children born per woman if all women lived to the end of their childbearing years and took children according to an offered fertility rate at each age.
A proposed mechanism for reducing total global greenhouse gases in which each country would be assigned the right to emit a certain quantity of carbon dioxide, according to its population size, setting the total at an acceptable global standard.
Streams of air that originate in semipermanent highpressure cells on the margins of the tropics and are attracted equator ward by a semipermanent low-pressure cell.
A railroad that would eventually link Moscow to the Pacific port of Vladivostok. Built between 1891 and 1903.
A region that consists of the republics of Armenia, Azerbaijan, and Georgia. Located between the Caucasus mountains and the borders of Turkey and Iran.
The movement of pastoral nomads and their herd animals between low-elevation winter pastures and high-elevation summer pastures.
A treaty between Spain and Portugal in 1494 gave Portugal control over the land that is present-day Brazil.
The treaty signed by the British and Maori in 1840 giving Britain control over New Zealand.