Earth Interior Structure
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A solid metal core made up of nickel and iron 2440 km diameter 2 the outer core.
Earth interior structure. At the heart of our planet lies a solid iron ball about as hot as the surface of the sun. It is made up of four main layers. However the depth of drill holes and therefore the direct observation of earth materials at depth is severely limited.
Structure of the interior of earth. Earth interior structure it is 3 950 miles 6 370 km from the earth s surface to its center. Interior structure of the earth the interior of the earth can be understood only by indirect evidences as no one has reached the interior of the earth.
The internal structure of earth is layered in spherical shells. The crust can be divided into. Scientific understanding of the internal structure of earth is based on observations of topography and bathymetry observations of rock in outcrop samples brought to the surface from greater depths by volcanoes or volcanic activity analysis of the seismic waves that pass t.
The interior of earth can be observed through direct evidence such as rock samples from mining deep ocean drilling project volcanic eruptions and indirect evidence such as seismic waves meteorite investigation gravitation force magnetic field etc. This composition is assumed based upon calculations of its density and upon the fact that many meteorites which are thought to be portions of the interior of a planetary body are iron nickel alloys. A cut away illustration of earth s interior.
The deepest layer is a solid iron ball about 1 500. The rock units and layers near the surface are understood from direct observation core samples and drilling projects. A liquid molten core of nickel and iron.
The crust is the outermost brittle solid part of earth ranging from 5 70 km. 1 the inner core. An outer silicate solid crust a highly viscous asthenosphere and mantle a liquid outer core that is much less viscous than the mantle and a solid inner core.
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