The outer core of the Earth is liquid metal, which conducts electricity.

地球的外核是能够导电的液态金属。

The motion from its liquid outer core generates a magnetic field.

来自其液体外核的运动产生了一个磁场。

And if you thought the mantle was hot, well, the outer core is even hotter.

如果你认为地幔已经够热的了，我要告诉你，外核更热。

The outer core is also mostly iron and nickel, but it's liquid.

外核也主要是铁和镍，但它是液态的。

At its very center is the core, which actually has two layers, the inner core and the outer core.

位于正中心的是地核，它实际上有两层，内核和外核。

Many scientists think it's because the Earth's magnetic field is tied to a liquid outer core deep inside the planet.

许多科学家认为这是因为地球的磁场与地球深处的液态外核相联系。

It was formed inside a DAC at 113 gigapascals — about as much pressure as just outside the Earth's outer core.

这种物质是用DAC制造的113兆帕的压强中形成的——大致相当于外地核的压强。

In the outer core, where it's still hot, but the pressure is a little bit lower, iron is a liquid.

而外核虽然也很热，但是压强稍微低一些，铁元素就是液态。

The outer core generates a strong magnetic field, which protects the Earth's atmosphere from the onslaught of the solar wind.

外核产生了强大的磁场，保护地球大气层免受太阳风的冲击。

For example, Earth's magnetic field is generated by charged molten metals circulating in the planet's outer core.

例如，地球的磁场是由在地球外核中循环的带电熔融金属产生的。

The outer core provides the extra heat that helps the magma get pumped up into the mantle.

外核提供额外的热量， 帮助岩浆被泵入地幔。

The 2,400 kilometer thick outer core is so hot, all that iron becomes molten and turns to liquid.

2400 公里厚的外核非常热，所有的铁都熔化并变成液体。

The outer core is a swirling mass of molten – or liquid – metal and it’s as hot as the surface of the Sun!

外壳是融化的或者说是液态的漩涡，它的温度和太阳表面的温度一样高！

In 2.3 billion years from now, the outer liquid core of Earth will freeze which means that Earth will lose its magnetic field forever.

在距今 23 亿年后，地球外层的液态内核将会冻结，这意味着地球将永远失去它的磁场。

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.

是的。我们地球稠密的内核由一个液态的外核包裹着。说明一下，Dense是指体积一定时重量大。

Well, the reason that the Earth even has a magnetic field has to do with the molten iron in the outer core.

好吧，地球甚至有磁场的原因都与外核中的铁水有关。

A new study models how a gigantic, morphing blob of liquid iron in Earth's outer core underneath the Canadian Arctic is losing its grip on the North magnetic pole.

一项新研究模拟了加拿大北极下的地球外核中一个巨大变形液态铁团如何失去对北磁极的控制。

And because that core is separated from the Earth's mantle by a liquid outer core, it allows the inner core to potentially rotate at a different speed from Earth's crust.

由于内地核与地幔之间隔着一层液态的外地核，这使得内地核能够以不同于地壳表面的速度进行旋转。

Scientists are generally agreed that the world beneath us is composed of four layers, rocky outer crust, a mantle of hot, viscous rock, a liquid outer core, and a solid inner core.

科学家们普遍认为，我们脚底下的世界共分4层，一个岩石外壳，一个由炽热而又黏稠的岩石组成的地幔，一个液态的外核，以及一个坚实的内核。

The internal structure of the Moon is roughly similar to the Earth: it has a solid, iron inner core; a liquid outer core, a thick mantle, and a crust of lighter material on top.

它有一个实心的铁质内核、一个液态的外核、一层厚厚的地幔和一层较轻物质组成的外壳。