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Glaciation
The changing of landforms by slowly moving glaciers.
Glossary
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Glacier
A large, long-lasting mass of ice that moves because of gravity.
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Global economy
The merging of regional economies in which nations become dependent on each other for goods and services.
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Global network
A worldwide interconnected group.
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Global warming
The buildup of carbon dioxide in the atmosphere, preventing heat from escaping into space and causing rising temperatures and shifting weather patterns.
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Globalization
The spread of free trade, free markets, investments, and ideas across borders and the political and cultural adjustments accompany this diffusion.
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Globe
A three-dimensional representation of the earth.
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GNI PPP
Per capita, gross national income purchasing power parity (per capita GNI PPP) combines gross national income (GNI) and purchasing power parity (PPP) as a method of comparing the real value of output between different countries’ economies.
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GNP
Gross national product. The total value of all goods and services produced by a country in a period of time.
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Gobi desert
A desert located in northern China and southeast Mongolia and a prime area for finding dinosaur fossils.
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Golan heights
A hilly plateau overlooking the Jordan River and the sea of galilee. A strategic location that has been the site of conflict in Southwest Asia for decades.
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Gorée island
An island off the coast of Senegal served as a major departure point for slaves during the slave trade.
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Graben
A landform is created when a segment of Earth’s crust is displaced downward between parallel tensional faults or segments of the crust that border it rides upward along parallel compressional faults.
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Grand Canyon
Created after millions of years of erosion from the Colorado River and its tributaries, this Arizona landmark is visited by millions of tourists each year.
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Great barrier reef
A 1,242-mile (1,9988 km) chain of more than 2,500 reefs and islands along Australia’s northeast coast, containing some 400 species of coral.
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Great game
A struggle between the British empire and the Russian empire for control of central Asia in the 19th century.
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Great kanto earthquake
An earthquake in 1923 in japan killed an estimated 140,000 people and left the city of Tokyo in ruins.
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Great lakes
A group of five freshwater lakes of central North America between the united states and Canada. The lakes are Huron, Ontario, Michigan, Erie, and superior.
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Great plains
A vast grassland of central North America is largely treeless and ascends to 4,000 feet above sea level.
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Great Rift Valley
The result of tectonic processes is a broad, steep-walled trough extending from the Zambezi Valley in southern Africa northward to the Red Sea and the Jordan River valley in southwestern Asia.