A large fraction of Earth’s interior, from a depth of about 650 km (400 miles) down to 2,900 km (1,800 miles), consists of the lower mantle, which is composed chiefly of magnesium- and iron-bearing silicates, including the high-pressure equivalents of olivine and pyroxene....
In the upper stratospheric regions, absorption ofultraviolet lightfrom the Sun breaks down molecular oxygen (O2); recombination of single oxygen atoms with O2molecules intoozone(O3) creates the shieldingozone layer. Above the relatively warm stratopause is the even more tenuousmesosphere, in which ...
In the earth science experiment about the Earth's interior, the layer that is much thicker than the crust and surrounds the core is ___. A. the crust B. the mantle C. the outer core 相关知识点: 试题来源: 解析 B。解析:这道题涉及地球内部结构的比较知识。地幔(the mantle)比地壳(the ...
The Crust Think of the crust of the earth like you would a peel of a fruit. This area is thin compared to the rest of the item. It is the weakest layer that is usually meant to prevent major damage to the other layers by breaking the fall. The crust of the earth is about 5 mile...
The interior of Nando's restaurant in Chesterfield. Image © Clayworks Rammed earth is one of the oldest methods of constructing walls and still holds great potential for modern earth construction. One aspect of this potential is the gift of its colors and layers, which become visible as the...
and heat transport across the boundary layer are strongly sensitive to the thermal dependence of the viscosity. We cannot rule out the possibility that a somewhat higher temperature sensitivity would imply that the models are in a stagnant-lid regime with boundary layer geometry determined by rheology...
The density of the Earth's interior varies from layer to layer. Which layer has the highest density? A. Crust B. Mantle C. Outer core D. Inner core 相关知识点: 试题来源: 解析 D。解析:地球内部各层密度不同,内核由高密度的铁镍等物质组成,其密度是最高的,地壳密度相对最小,地幔密度次之,...
The interior of Nando's restaurant in Chesterfield. Image © Clayworks Rammed earth is one of the oldest methods of constructing walls and still holds great potential for modern earth construction. One aspect of this potential is the gift of its colors and layers, which become visible as the...
A diamond layer in Mercury’s deep interior Surface observations suggest that carbon may exist in Mercury’s interior. Under planetary mantle pressures and temperatures, carbon may be present as a stable diamond layer which may have important implications for the physical and chemical properties of ...
Planetary scientists have determined that the moon formed nearly 100 million years after the start of the solar system, according to a new article. This conclusion is based on measurements from the interior of the Earth combined with computer simulations of the protoplanetary disk from which the Ea...