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Pixelgost`s Dynamic Planet test
Pixelgost`s Dynamic Planet test

... 3. What is the name of the Most recent supercontinent? 4. What are the names of the two Supercontinents that broke apart to form today’s Earth? 5. What was the name of the ocean that surrounded the most recent supercontinent? 6. What is North America’s Craton? 7. What is the process of the movement ...
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Answer Key - Scioly.org

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Continental Drift and Sea-Floor Spreading 7.2

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Chapter 5: Earth and its Moon - Otto

... Creates magnetic field in and around earth Compasses respond to this magnetic field North and south magnetic poles roughly aligned with the earth’s rotation axis • Magnetic N is 13.5° E of true N in LB • Caused by charged particles in earth’s molten metallic core ...
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History of geomagnetism



The history of geomagnetism is concerned with the history of the study of Earth's magnetic field. It encompasses the history of navigation using compasses, studies of the prehistoric magnetic field (archeomagnetism and paleomagnetism), and applications to plate tectonics.Magnetism has been known since prehistory, but knowledge of the Earth's field developed slowly. The horizontal direction of the Earth's field was first measured in the fourth century BC but the vertical direction was not measured until 1544 AD and the intensity was first measured in 1791. At first, compasses were thought to point towards locations in the heavens, then towards magnetic mountains. A modern experimental approach to understanding the Earth's field began with de Magnete, a book published by William Gilbert in 1600. His experiments with a magnetic model of the Earth convinced him that the Earth itself is a large magnet.
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