Our world is made up of four layers: the crust, mantle, outer core and inner core. The late is the top-most layer, complied with by the thickest layer, the mantle. The innermost great is the core, and it is written of the outer and also inner core. This short article seeks to highlight the 4476mountvernon.com in between the two 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 within core
Solid sphere 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 estimated to be around 5,400 levels Celsius or 9,800 degrees FahrenheitHottest an ar is around 3,730-7,730 degrees Celsius or 6,740-13,940 levels Fahrenheit


A cross-section that the planet showing its various layers

The inner core is the innermost class of the Earth, and is believed to it is in a solid ball composed that iron and nickel along with some light facets (e.g., oxygen, sulfur, silicon). It has actually an estimated radius that 1220 kilometres (768 mi).

Seismologist Inge Lehmann was the an initial to discover the inner core as being solid and also covered through a liquid outer core. Lehmann was able to arrive at this conclusion by researching seismic waves led to by earthquakes bouncing off the inner core’s boundary. That was argued in 1940 the this inner main point is solid iron.

It is a widely-held belief that the inner core is gradually expanding as the liquid outer core cools down and also solidifies whereby the two layers meet. This growth is thought to be necessary in generating the planet’s magnetic field. In addition, scientists also believe this phenomenon indicates a homogeneous properties of the inside core; that is, it remains solid if the is growing into the liquid outer core. It has been suggested the inner core could additionally be a big iron crystal. This concept was disproved as soon as the inner core was uncovered to be not totally uniform. Recently, researcher have discovered that the inside core additionally contains an inside inner core. It is thought to be between 250 to 400 kilometers in diameter.

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

The continuous churning of liquid iron of the outer core creates magnetic fields and also electricity. This constant process is dubbed the geodynamo, and it is responsible for the magnetic field surrounding our planet. There is no the earth magnetic field, our atmosphere would be quickly blown away by solar winds.

Inner core vs outer Core of the Earth

Now the we have actually the facts, those the 4476mountvernon.com in between the inner core and outer core of the Earth? The earth inner main point is a solid ball of iron, nickel and also other metals, if the outer core is liquid steel composed the iron and nickel as well. The temperature the the inner main point is estimated to be around 5,400 degrees C or 9,800 degrees F, far past iron’s melting point. Intense pressure current within the inner core prevents the iron indigenous melting. The hottest an ar of the outer core is around 3,730-7,730 levels C or 6,740-13,940 levels F.

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