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。
I think this is a good way to bring in the new words and phrases in the context. And it helps the students to learn core vocabulary about this topic in forms of various complete sentences. And also these three...
The surface of the Earth is completely liquefied, and the core of the impacting body penetrates the Earth's mantle, becoming part of the Earth's core. We think the Earth's core fused with that of the impacting body.地球表面完全液化，撞击体的核穿透地幔，成为地核的一部分。我们认为地核与撞击...
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 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...
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 inner core and outer core are made up mainly of iron and nickel, the lower and upper mantle mainly of iron and magnesium silicate minerals, and the crust mainly of silicate minerals. Earth (ûrth) 1.The third planet from the sun and the fifth largest. Earth is the only planet know...
Earth’s magnetic field is generated by turbulent motion in its fluid outer core. Although the bulk of the outer core is vigorously convecting and well mixed, some seismic, geomagnetic and geodynamic evidence suggests that a global stably stratified layer exists at the top of Earth’s core. Su...
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 ...