The Earth's core is mainly composed of _. A. Iron and nickel B. Silicon and oxygen C. Aluminum and magnesium D. Calcium and potassium 相关知识点: 试题来源: 解析 A。解析:地球的核心主要由铁和镍组成。选项A正确。选项B中的硅和氧是地壳中较为常见的元素组成。选项C中的铝和镁不是地核的主...
The Earth's core is mainly composed of ___. A. Iron and nickel B. Silicon and oxygen C. Magnesium and aluminum D. Carbon and hydrogen 相关知识点: 试题来源: 解析 A。解析:地球的核心主要由铁和镍组成。选项A符合地球科学中关于地球核心组成成分的事实。选项B硅和氧是地壳中较为常见的元素组合。
The Earth's core is mainly made up of ___. A. silicon and oxygen B. iron and nickel C. magnesium and iron 相关知识点: 试题来源: 解析 B。解析:地球的地核主要由铁和镍组成。硅和氧是地壳中含量较多的元素,镁和铁不是地核主要的组成成分。反馈...
A. molten rock B. solid iron and nickel C. gas D. water 相关知识点: 试题来源: 解析 B。解析:地球的内核主要由固态的铁和镍组成。选项A,熔融的岩石主要存在于地幔中,而非内核;选项C,地球内核不是由气体组成的;选项D,水不可能是地球内核的主要组成部分。反馈...
A. iron and nickel B. rock and soil C. water and gas D. ice and snow 相关知识点: 试题来源: 解析 A。本题考查地球内部结构的知识。地球的内核主要由铁和镍组成,选项 B 岩石和土壤主要存在于地壳,选项 C 水和气体通常不在地球内核,选项 D 冰雪更不可能在内核。反馈...
iron of the centre of the earth dissolves core and external the earth's crust to rotate and inconsistent, will dissolve core and nuclear intersection outside in the iron and form the current of the flow direction opposite to turning direction on the earth, make iron dissolve neutron and mag ...
Which part of the Earth is thought to be composed of solid iron and nickel? A. Mantle B. Outer core C. Crust D. Inner core 相关知识点: 试题来源: 解析 D。解析:内核被认为是由固态的铁和镍组成的。地幔主要由半液态岩石组成,A选项错误。外核是液态的铁镍层,B选项错误。地壳主要由岩石组成,C...
The metals which we find in the earth___(包括)iron,lead and copper.在我们地球上发现金属包括有铁,铅和铜3.If anyone ever catches___of the mugger行凶抢劫的路贼anywhere, please call the police at once.4.Where shall I___n?我在哪里下火车5.Every evening after supper晚餐,my parents would...
Iron is believed to be the main component of the Earth's core on the basis of a combination of evidence from cosmochemistry, geomagnetism, seismology, and high-pressure experimentation. With the availability of high-resolution data from seismic arrays and from the studies of the inverse problem ...
So, it’s pretty evident that iron ceases to be a ferromagnetic material beyond 770 degrees Celsius. However, we also know that Earth’s core consists of molten iron, which is so incredibly hot (nearly 6000 degrees Celsius) that it makes the core as hot as the surface of the sun itself...