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Life on the earth has been evolving since 3 5 billion years ago.
Earth s interior composition. Interior structure of the earth. The core makes up about 31 of the earth. The core is composed mostly of iron fe and is so hot that the outer core is molten with about 10 sulphur s.
Finally the core is mostly iron metal. Because our earth has got every ingredient for the life to emerge. It is composed of basalt a dark igneous rock with a density of 3 0 g cm 3.
Earth has a core but this is really two distinct parts. Let s start from the inside and work our way out. 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.
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. The inner core is under such extreme pressure that it remains solid. The deepest layer is a solid iron ball about 1 500.
Our earth is a unique planet in the solar system and also in the known universe because it supports life. The interior structure of the earth is composed of three main layers. This work is divided into eight chapters that primarily focus on the physical chemical and petrological state.
Core mantle and crust are divisions based on composition. The crust makes up less than 1 percent of earth by mass consisting of oceanic crust and continental crust is often more felsic rock. The earth s interior is composed of four layers three solid and one liquid not magma but molten metal nearly as hot as the surface of the sun.
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