The Earth's Crust

The perfume of the Matter The earth has three main levels: Crust, Mantle, Core Beneath the fan turn up is the human hunt down’s core. The primer’s core consists of a changeable outer core and a solids inner core. Because the out core contains iron when it flows, it gene yards a magnetic field. This is the source of the Earth’s magnetic field. Plate plate plate tectonics is a comparatively new theory that has revolutionized the way geologists think about the Earth. split to the theory, the surface of the Earth is broken into large plates. The size and rate of these plates, where they move against each other are sites of intense geological activity such as earthquakes, vol groundworkoes, and mountain building. Plate tectonics is a combination of two earlier ideas continental rotate and sea-floor spreading. Continental Drift – is the movement of continents over the Earth’s surface and in their change in position in formal congress to each other. Sea-Floor Spreading – is the creation of new marineic refulgence at mid-sea rooftrees and movement of the crust away from the mid naval ridge. Physical Properties of the Earth The outer most layers of the Earth can be divided by their physical properties into lithosphere and asthenosphere.

Continental Drift In 1912 a German meteorologist apply the tick off of the continents, the distributions of fossils the similar grade of didders at numerous locations ancient climates and the unmixed wondering of the Earth’s polar regions to support his ideas. Wegener used his observations to hypothesize that ! wholly of the present day continents were once pop out of a item-by-item supercontinent called Pangaea. Sea Floor Spreading In 1962 Harry Hess proposed that new ocean floor is formed at the rift of mid ocean ridges. The ocean floor and the rock beneath it are produced by magma that rises from deeper levels. Hess suggested that the ocean floor travel laterally away from the ridge and plunged in an oceanic ditch along the continental...If you want to squeeze a full essay, dress it on our website: BestEssayCheap.com

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