Our planet is made up of 4 layers: the crust, mantle, outer core and inner core. The crust is the top-most layer, complied with by the thickest layer, the mantle. The innermost class is the core, and it is created of the outer and also inner core. This post seeks to highlight the stclairdrake.net in between the 2 innermost great of the Earth.

You are watching: Compare and contrast the outer core and the inner core

Inner CoreOuter Core
Innermost great of EarthSurrounds the inside core
Solid round of iron and nickelMade of fluid iron and nickel
Has a radius of 1,220 kilometers or 768 milesApproximately 2,300 kilometers or 1,400 mile thick
Temperature approximated to be around 5,400 levels Celsius or 9,800 levels FahrenheitHottest region is around 3,730-7,730 degrees Celsius or 6,740-13,940 degrees Fahrenheit


A cross-section that the earth showing its various layers

The inner core is the innermost great of the Earth, and also is believed to be a solid ball composed of iron and also nickel along with some light aspects (e.g., oxygen, sulfur, silicon). It has an approximated radius that 1220 kilometres (768 mi).

Seismologist Inge Lehmann was the first to discover the inner main point as gift solid and covered by a liquid external core. Lehmann had the ability to arrive in ~ this conclusion by examining seismic waves resulted in by earthquakes bouncing off the within core’s boundary. The was argued in 1940 that this inner main point is heavy iron.

It is a widely-held id that the inner core is gradually expanding as the liquid outer core cools down and solidifies where the two layers meet. This expansion is believed to be important in generating the planet’s magnetic field. In addition, scientists likewise believe this phenomenon shows a homogeneous properties of the within core; the is, it remains solid if the is cultivation into the liquid external core. It has been suggested the inner main point could additionally be a big iron crystal. This concept was disproved once the inner core was found to it is in not totally uniform. Recently, researchers have found that the inner core additionally contains an inside inner core. That is thought to be between 250 come 400 kilometers in diameter.

The outer core of the earth is a liquid layer of iron and also nickel 2,890 kilometers (1,400 miles) in ~ the surface ar of the Earth. It follow me to around 2,300 kilometers (1,400 miles). That is estimated that the temperature that the outer core is from 4,000-8,000 K (6,740-13,940 levels F or 3,730-7,730 levels C) together it gets close to the within core, and also 3,400-4,500 K (4,940-7,640 degrees F or 2,730-4,230 levels C) in its external regions.

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The constant churning of fluid iron that the external core create magnetic fields and also electricity. This continuous process is called the geodynamo, and it is responsible because that the magnetic field surrounding ours planet. Without the earth magnetic field, our environment would be quickly blown far by solar winds.

Inner main point vs outer Core of the Earth

Now the we have actually the facts, what’s the stclairdrake.net in between the within core and also outer core of the Earth? The earth’s inner core is a solid ball of iron, nickel and other metals, while the outer core is liquid steel composed that iron and also nickel as well. The temperature that the inner main point is estimated to be about 5,400 levels C or 9,800 degrees F, far beyond iron’s melting point. Extreme pressure present within the inner core stays clear of the iron from melting. The hottest an ar of the outer core is around 3,730-7,730 degrees C or 6,740-13,940 levels F.

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In terms of size, the inside core’s radius is around 1,220 kilometers (768 miles). The external core is thought to be around 2,300 kilometers (1,400 miles) thick, and is located 2,890 kilometers (1,400 miles) in ~ the surface of the Earth. The inner core is about 6,371 kilometers (3,958 miles) deep beneath the surface.