Structure of the Earth

Earth's radial density distribution according to the preliminary reference earth model (PREM).[2]Earth's gravity according to the preliminary reference earth model (PREM).[2] Comparison to approximations using constant and linear density for Earth's interior.Mapping the interior of Earth with earthquake waves.Schematic view of the interior of Earth. 1. continental crust – 2. oceanic crust – 3. upper mantle – 4. lower mantle – 5. outer core – 6. inner core – A: Mohorovičić discontinuity – B: Gutenberg Discontinuity – C: Lehmann–Bullen discontinuity.

The interior structure of the Earth is layered in spherical shells, like an onion. These layers can be defined by their chemical and their rheological properties. Earth has an outer silicate solid crust, a highly viscous 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.

单词	barysphere
释义	barysphere /'bærɪ,sfɪə//'bærɪsfɪr/ 英汉-汉英词典 n. 地心圈词组 \| 习惯用语您要查找的是不是： atmosphere n. 大气；空气；气氛；气压 hemisphere n. 半球 hydrosphere n. 水圈,水气,水界 biosphere n. 生物圈 bathysphere n. 探海球, 潜水球 barysphere n. [地质] 重圈；地核网络短语: barysphere e 重圈英语百科 Structure of the Earth The interior structure of the Earth is layered in spherical shells, like an onion. These layers can be defined by their chemical and their rheological properties. Earth has an outer silicate solid crust, a highly viscous 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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barysphere /'bærɪ,sfɪə//'bærɪsfɪr/

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网络短语:

Structure of the Earth