Daily Archives: March 16, 2008

Earthquake and Plate Tectonics

Posted on March 16, 2008 by

Earthquakes are not randomly distributed over the Earth’s surface. They are concentrated in narrow zones. The theory of plate tectonics combines many of the ideas about continental drift (originally proposed in 1912 by Alfred Wegener in Germany) and sea-floor spreading … Continue reading →

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Plate Tectonics:Plate Boundaries

Posted on March 16, 2008 by

The theory of plate tectonics has done for geology what Charles Darwin’s theory of evolution did for biology. It provides geology with a comprehensive theory that explains “how the Earth works.” The theory was formulated in the 1960s and 1970s … Continue reading →

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Plate Tectonic Theory

Posted on March 16, 2008 by

  Plate tectonics is the theory that Earth’s outer layer is made up of plates, which have moved throughout Earth’s history. The theory explains the how and why behind mountains, volcanoes, and earthquakes, as well as how, long ago, similar … Continue reading →

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Landsat 5 Satellite Back in Action

Posted on March 16, 2008 by

Orbiter’s Designed Three-Year Mission, Begins its 24th Year in Operation March 13 March 2008 The earth imaging satellite Landsat 5 is once again collecting and downlinking land-image data. The satellite was temporarily taken out of service in October 2007 following … Continue reading →

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