Our world is made up of 4 layers: the crust, mantle, outer core and also inner core. The late is the top-most layer, adhered to by the thickest layer, the mantle. The innermost layer is the core, and it is composed of the outer and inner core. This write-up seeks to highlight the ptcouncil.net in between the 2 innermost layers of the Earth.

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

Inner CoreOuter Core
Innermost class of EarthSurrounds the inside core
Solid round of iron and nickelMade of liquid iron and also nickel
Has a radius of 1,220 kilometers or 768 milesApproximately 2,300 kilometers or 1,400 miles thick
Temperature estimated to be about 5,400 degrees Celsius or 9,800 levels FahrenheitHottest an ar is around 3,730-7,730 degrees Celsius or 6,740-13,940 degrees Fahrenheit


A cross-section that the planet showing its different layers

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

Seismologist Inge Lehmann to be the first to uncover the inner core as being solid and covered by a liquid external core. Lehmann was able to arrive in ~ this conclusion by studying seismic waves resulted in by earthquakes bouncing turn off the inside core’s boundary. The was argued in 1940 that this inner core is hard iron.

It is a widely-held belief that the inner core is gradually broadening as the liquid external core cools down and solidifies where the 2 layers meet. This development is thought to be crucial in generating the planet’s magnetic field. In addition, scientists also believe this phenomenon indicates a homogeneous characteristics of the inside core; the is, it stays solid if it is farming into the liquid external core. It has actually been said the inner main point could also be a big iron crystal. This concept was disproved as soon as the inner core was discovered to be not completely uniform. Recently, researcher have discovered that the inside core additionally contains an inside inner core. That is thought to be between 250 to 400 kilometers in diameter.

The outer main point of the earth is a fluid layer that iron and also nickel 2,890 kilometers (1,400 miles) in ~ the surface of the Earth. It follow me to around 2,300 kilometers (1,400 miles). The is estimated that the temperature of the outer core is indigenous 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 3,400-4,500 K (4,940-7,640 degrees F or 2,730-4,230 degrees C) in its outer regions.

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

Inner main point vs external Core of the Earth

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

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