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This series shows the physical processes and human activities that shape our planet. From earthquakes and volcanoes to the creation of sea-floor crusts and shifting river courses, Earth Revealed offers stunning visuals that explain plate tectonics and other geologic concepts and principles. Follow geologists in the field as they explore the primal forces of the Earth.
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Category Videos
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Not Right For WatchKnowLearn
Ages: 16 - 18
2114 Views:
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The weight of a mountain creates enough pressure to recrystallize rock, thus creating metamorphic rocks. This program outlines the recrystallization process and the types of rock it can create — from claystone and slate to schist and garnet-bearing g...neiss. The relationship of metamorphic rock to plate tectonics is also covered.
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March 9, 2010 at 10:20 PM
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Not Right For WatchKnowLearn
Ages: 16 - 18
1302 Views:
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This program erodes the myth of the mountain as a solid, permanent structure. Animations are used to illustrate the process of orogeny (mountain building) through accretion and erosion, as well as the role of plate tectonics, the rock cycle, and how ...different types of rock are formed in the course of mountain building.
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March 9, 2010 at 10:08 PM
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Not Right For WatchKnowLearn
Ages: 16 - 18
1275 Views:
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The Cleopatra’s Needle obelisk in New York City’s Central Park is severely weathered after only 75 years, whereas the dry climate of Egypt has preserved similar structures in that country for millennia. This program shows how weather, climate, chemic...als, temperature, and type of substrate factor into rock and soil erosion. Environmental connections are also considered.
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March 9, 2010 at 10:17 PM
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Not Right For WatchKnowLearn
Ages: 16 - 18
1140 Views:
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Glaciers
From learner.org, produced by Intelecom
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Many of the world’s most beautiful landscapes were made by glaciers. This program shows how, explaining glacial formation, structure, movement, and methods of gouging and accumulating earth. The program provides images of glaciers and glacial landfor...ms such as moraines, and discusses how study of glaciers may help us understand ice ages and the greenhouse effect.
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March 9, 2010 at 10:26 PM
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Not Right For WatchKnowLearn
Ages: 16 - 18
2903 Views:
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Rivers are the most common land feature on Earth and play a vital role in the sculpting of land. This program shows landscapes formed by rivers, the various types of rivers, the basic parts of a river, and how characteristics of rivers — their slope,... channel, and discharge — erode and build the surrounding terrain. Aspects of flooding are also discussed.
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March 9, 2010 at 10:22 PM
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Not Right For WatchKnowLearn
Ages: 16 - 18
1146 Views:
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In the 1960s, earth scientists developed the theory of plate tectonics. This program traces the development of plate tectonics, beginning with the contributions and methods of geologist Alfred Wegener. Sea-floor spreading, continental drift, paleomag...netism, and the primordial supercontinent Pangaea are some of the topics covered.
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March 9, 2010 at 10:06 PM
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Not Right For WatchKnowLearn
Ages: 16 - 18
1027 Views:
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Land in arid climates is shaped in particular ways. This program shows how deserts are defined by infrequent precipitation and how desertification relates to proximity to the equator, proximity to mountains, and ultimately plate tectonics. Images of ...landscapes illustrate how wind creates features such as dunes, playas, blow-outs, and even oases.
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March 9, 2010 at 10:25 PM
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Not Right For WatchKnowLearn
Ages: 16 - 18
994 Views:
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Since the nineteenth century, humans have turned to the Earth for energy sources to fuel their industry. This program discusses where oil comes from, how it is extracted, and how it is converted into energy. The effects of oil drilling and the burnin...g of fossil fuels are also addressed, and the potential of alternative energy sources is considered.
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March 9, 2010 at 10:29 PM
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Not Right For WatchKnowLearn
Ages: 16 - 18
967 Views:
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Early Greek astronomers believed that Earth was the center of the universe. However, this notion changed dramatically over time, especially after the invention of the telescope. This program traces the development of astronomical theory with discussi...ons of the discoveries of Copernicus, Galileo, Kepler, and Newton. Unique characteristics of Earth are also discussed.
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March 9, 2010 at 10:01 PM
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Not Right For WatchKnowLearn
Ages: 16 - 18
754 Views:
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Anyone undertaking a building project must understand mass wasting — the downslope movement of earth under the influence of gravity. Various factors in mass wasting, including the rock’s effective strength and pore spaces, are discussed, as are diffe...rent types of mass wasting such as creep, slump, and landslides. Images of an actual landslide illustrate the phenomenon.
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March 9, 2010 at 10:18 PM
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