Inside the earth

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Information about Inside the earth
Education

Published on November 6, 2013

Author: cmc1b

Source: slideshare.net

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You can learn about the interior of the Earth

Inside the Earth Victoria Saura Montesinos The interior structure of the Earth is layered in spherical shells, like an onion.

Its structure is divided in: Mohorovičić discontinuity Gutenberg discontinuity) Lehmann discontinuity

(Rigid) (Rigid) These layers can be defined by either their chemical or their rheological properties. Earth has a solid crust, a highly viscous mantle, a liquid outer core and a solid inner core. (Plastic) (Rigid) Lithosphere astenosphere

•The crust it’s the outermost layer. •The thin parts are the oceanic crust, which underlie the ocean basins (5–10 km). •The thicker crust is continental crust, which is less dense. •The uppermost mantle together with the crust constitutes the lithosphere.

Convection currents are produced by differences in temperature and density, so that the hotter material weigh less and rise and cooler material, are thicker and heavier and descends. The mantle is the thickest layer of Earth. It’s composed of silicate rocks that are rich in iron and magnesium. ·The origin of plate movement occurs by some material currents in the mantle, the socalled convection currents, and especially, in the force of gravity.

•There aren’t denser materials than the Earth's core. •Seismic measurements show that the core is divided into two parts, a “solid” inner core and a “liquid” outer core.

Plates The asthenosphere is the part of the mantle that flows and moves the plates of the Earth. •The lithosphere is broken into many pieces called plates. •The plates "float" on the soft, plastic mantle which is located below the crust. •These plates usually move along smoothly but sometimes they stick and build up pressure. •The pressure builds and the rock bends until it snaps. •When this occurs an earthquake is the result.

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