INTERNAL STRUCTURE OF EARTH
From eighteenth century, geology became a central issue for scientists, who, with the development of new and increasingly sophisticated instruments, able to provide increasingly accurate data. Until the late twentieth century with the arrival of new and more accurate theories, such as "plate tectonics", geology underwent a major boost.
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"Geodynamics: studies the changes and movements of the crust.
" Historical Geology: Study succession of geological time.
"Geology applied: Studies and analyzes surface and subsurface resources.
"Geophysics: studied physical phenomena occurring in the atmosphere.
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To study the structure of the earth, scientists have developed new direct and indirect methods.
Direct methods are generally used in the search for minerals in soil and subsoil, and indirect costs are those that use seismic waves to create reliefs model for the study of formaaciones and structures.
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With this type studies, has succeeded in concluding with the theory that suggests that Earth is comprised of internal layers and layers externas.Las inner layers are composed of very hot and heavy materials such as iron and nickel. These are divided into core, mantle and discontinuities.
With this type studies, has succeeded in concluding with the theory that suggests that Earth is comprised of internal layers and layers externas.Las inner layers are composed of very hot and heavy materials such as iron and nickel. These are divided into core, mantle and discontinuities.
The nucleus: With a temperature between 3000 and 5500 ยบ C, which in turn can be divided into two parts, outer and inner core. The inner core, which scientists believe is strong and is comprised almost entirely of iron. And the outer core, which by contrast is believed to be liquid and is composed of iron and nickel. The transition zone between both, could be what makes up the planet's magnetic field.
Mantle: is very large and is just below the crust, covering discontinuities Mohorovicic Gutenberg and is divided in two. The outer mantle contains lava pits (which emerges from the volcano), have different temperatures and densities, in addition to performing constant movements that lead to fracture or failure of the plates in the earth's crust. And the inner mantle, consists of small stones formed by iron and magnesium, so it is a solid body, and the deeper, more iron it contains.
The crust: is the uppermost layer of the planet, she finds the ocean floor and plate tectonics; understood from the discontinuity of Mohorovicic and even the atmosphere. Its structure is very complex. And it will make two layers: the hydrosphere and atmosphere.
The hydrosphere: is that which contains all the planet's water in oceans, rivers, lakes and aquifers.
The atmosphere: contains all those gases that allow us to breathe and move on with life.
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