根据倒数第三段中的“In the 1990s, two scientists, Paul Richards and Xiaodong Song, studied the inner core by looking at the waves from earthquakes that travel through the center of the Earth.(上世纪90年代,保罗·查兹(Paul Richards)和宋晓东(Xiaodong Song)两位科学家通过观察穿过地球中心的地震波来...
The inner core is slightly smaller than the Moon but is more than three times denser. It represents less than two per cent of the mass of the Earth but nevertheless has had important effects on the Earth's magnetic field and on the thermal history of the core....
The mantle is made up of solid rock that can flow very slowly over long periods of time. The core is the innermost layer of the Earth. It is divided into two parts: the outer core and the inner core. The outer core is liquid and mainly composed of iron and nickel. The inner core ...
Surrounding the inner core of the Earth is Earth's LayersIf you could cut the Earth in half, you could see that it's made of several different layers. The outermost layer, called the crust, is the one that we walk on every day. The layer beneath the crust is called the mantle....
Yes. The Earth has a dense inner core surrounded by a fluid outer core. Dense, by the way, means heavy in relation to its size. But, Rob, I've got a question for you as usual: how big do you think the inner core is? Is it the ...
Both of these are made mainly of the metals iron and nickel. The outer core is liquid. But the inner core is a solid ball held in this liquid...(地核有两部分:外核和内核。 这两部分主要由金 属铁和镍构成。 外核是液态的。 但内核是一个被液体包裹 的固体球 … ”可知,本段主要介绍的是...
Being a crystalline phase, the body-centered cubic phase of iron possesses the viscosity close to that of a liquid iron. The high attenuation of sound in the inner core is due to the unique diffusion characteristic of the body-centered cubic phase. The low viscosity of iron in the inner ...
Scientists have learned more about the inner workings of the Earth by studying the way waves from earthquakes travel through the planet's center. The results suggest that the Earth's inner core may be starting to spin more slowly than the Earth.The Earth's core has two parts: the outer co...
The core is the innermost layer of Earth, extending from the exact center of the Earth. It has an average depth of 6470km. The border between the inner core and outer core is about 5100km below the Earth's crust. The core has two parts....
Inner Coreis made ofiron,nickel,alloy 内核是由铁、镍、合金制成 Inner Core is center of the Earth 内壳是地球的中心 单词 crust :[krʌst]n. 外壳;面包皮;坚硬外皮 mantle :[ˈmæntl]n. 地幔;斗篷;覆盖物 outer core:外核; inner co...