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Why is the inner core solid while the outer core is liquid?

Why is the inner core solid while the outer core is liquid?

Scientists know that the outer core is liquid and the inner core is solid because: S-waves do not go through the outer core. The strong magnetic field is caused by convection in the liquid outer core. Convection currents in the outer core are due to heat from the even hotter inner core.

Why is the inner core metal solid?

Lighter, less dense substances stayed closer to the crust. That’s why the inner core is comprised of some of the heaviest materials on Earth. With a gigantic ball of solid metal as its core, all of Earth is magnetic. Scientists believe Earth’s powerful magnetic field is controlled by the liquid outer core.

What is the best explanation why the inner core is solid?

3 Answers. Earth’s inner core is solid even though the temperature is so high because the pressure is also very high. According to the Wikipedia article on the Earth’s inner core, the temperature at the center is 5,700 K and the pressure is estimated to be 330 to 360 GPa (∼3⋅106 atm).

Is the inner core solid or liquid?

However, unlike the outer core, the inner core is not liquid or even molten. The inner core’s intense pressure—the entire rest of the planet and its atmosphere—prevents the iron from melting.

Which is used as evidence that the inner core is solid?

“A PKJKP traverses the inner core as a shear wave, so this is the direct evidence that the inner core is solid,” Cao told LiveScience, “because only in the solid material the shear wave can exist. In the liquid material, say water, only the compressional wave can travel through.”

What is the thinnest part of the planet?


Why can’t we get to the Earth’s core?

It’s the thinnest of three main layers, yet humans have never drilled all the way through it. Then, the mantle makes up a whopping 84% of the planet’s volume. At the inner core, you’d have to drill through solid iron. This would be especially difficult because there’s near-zero gravity at the core.

Do we live on top of earth or inside?

Earth’s interior is made of several layers. The surface of the planet, where we live, is called the crust—it’s actually a very thin layer, just 70 kilometres deep at its thickest point. The crust and the lithosphere below (the crust plus the upper mantle) is made of several ‘tectonic plates’.

Where are we live on Earth?

Earth is the planet we live on. It is the only planet in the Solar System with liquid water on its surface. It is also the only planet we know to have life on it.