B. It is a layer with very low temperature. C. It is a semi - molten and ductile layer. D. It is mainly made of gas. 相关知识点: 试题来源: 解析 C。解析:软流圈(asthenosphere)是上地幔(upper mantle)的一部分,它不是完全固态和刚性的(A错误),它是一种半熔融、具有韧性的层,这里的物质...
The biosphere is the global ecosystem, which is the zone of life on Earth. It is composed of three different parts, which are abiotic, biotic and energetic components. The biosphere is where life exists. Answer and Explanation: Become a Study.com member to unlock this answer!Create your acco...
Yet, our understanding of mantle convection remains enigmatic. Questions persist on a number of fundamental topics, ranging from the origin of large igneous provinces to whether the mantle is compositionally heterogeneous.Philip J. HeronEdward J. Garnero...
The lithosphere–asthenosphere boundary is usually referred to asthe LAB. The asthenosphere is almost solid, although some of its regions are molten (e.g., below mid-ocean ridges). The lower boundary of the asthenosphere within the mantle is not well defined. Is the mantle the thickest layer?
that contains undulations of up to 3-5 miles wide. Beneath the boundary zone, the molten outer core is much denser than the mantle above as a result of the heavy amounts of iron it contains, and below this layer is the inner core, which is composed of extremely hot solid nickle and ...
Perhaps the biggest difference between the start of that legendary Red Sox season and this current one is that there was very little social media in those days. MySpace had only debuted the previous year, and while Facebook was launched one month prior to the start of the Sox season, it ...
线世格部没己王便多外金们线世格部没己王便多外金们It is composed of a single type of rock线世格部没己王便多外金们线世格部没己王便多外金们 C. 自容论表象属式过必自容论表象属式过必It can convect slowly自容论表象属式过必自容论表象属式过必 D. 器山历各整他再府图越则采不器山...
When a satellite or a rocket that is orbiting the earth photographs the planet, the picture is of the earth's surface, or crust. This is where we live and move, land and water. The highest points are the mountains and the lowest points are the ocean basi
Ozone is categorized as a highly reactive gas. It is composed of three oxygen atoms. It is demonstrated as both a natural product as well as a man-made product. It tends to rise in the upper atmosphere of the Earth. Answer and Explanation: 1 Become a Study.com member to unlock this...
Core refers to the central, most important part of something, often internal or hidden; base describes the bottom support or foundation part of an object, crucial for stability.