density of the earth and its layer (short note)
Answers
The internal structure of the Earth is layered in spherical shells: 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 the 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 through the Earth, measurements of the gravitational and magnetic fields of the Earth, and experiments with crystalline solids at pressures and temperatures characteristic of the Earth's deep interior.
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Density of Earth
The average density of Earth is5.515 g/cm3. Because the average density of surface material is only around3.0 g/cm3, we must conclude that denser materials exist within Earth's core.
It's layer
Structure of the Earth
Thickness (km) Density (g/cm3)
- Density (g/cm3)Crust 30. 2.2
- Upper mantle 720. 3.4
- Lower mantle 2,171 4.4
- Outer core. 2,259. 9.9
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