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...
The Earth's core is mainly made up of. A. Iron and nickel B. Oxygen and nitrogen C. Silicon 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。氧和氮是大气中的主要成分,硅和铝更多存在于地壳等部分,碳和氢不是地球核心的主要组成成分。
1、The Structure of the Earth and Plate TectonicsStructure of the Earth The Earth is made up of 3 main layers: Core Mantle CrustInner coreOuter coreMantleCrustThe Crust This is where we live! The Earths crust is made of:Continental Crust- thick (10-70km)- buoyant (less dense than ...
According to the study, the "snow" in the Earth's core is made of tiny particles of iron -- much heavier than any snowflake on the planet's surface -- that fall from the molten outer core and pile on top of the inner core, creating layers up to 320 km thick that cover the inner...
The inner core is considered to be reversing and backtracking relative to the planet’s surface due to moving slightly slower instead of faster than the Earth’s mantle for the first time in approximately 40 years. Relative to its speed in previous decades, the inner core is slowing down. ...
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 is made up of three layers. In the centre is the core, which is as big as the Mars and has a high 1 of over 7,000˚C. 2 the core is a thick layer called the mantle, 3 lower part is solid rock, 4 portion is molten rock called the magma. Floating on top of th...
Earth - Core, Crust, Mantle: Earth’s outermost, rigid, rocky layer is called the crust. It is composed of low-density, easily melted rocks; the continental crust is predominantly granitic rock (see granite), while composition of the oceanic crust corres
Geologists believe the earth is neither liquid nor solid all the way through. It is a made up of different layers. Some of these layers are solid. Some are liquid, and some are both. The layers of the earth have special names. They are the crust, the mantle, and the core. These lay...
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。