Q:

What are some interesting facts about the outer core?

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Quick Answer

The outer core, one of the three layers of the Earth, is approximately 1,430 miles (2,300 kilometers) thick and between 7,200 and 9,000 F. According to National Geographic, the outer core is mostly composed of iron and nickel in a liquid alloy form.

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What are some interesting facts about the outer core?
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Full Answer

The outer core is the middle layer of the Earth’s three layers, and is located about 1,800 miles below the Earth’s crust, the top-most surface of the Earth. The inner core is the hottest region and the innermost region of the Earth. The outer core surrounds the inner core and borders the mantle, which is the third region and the closest region to the Earth’s crust. Both the outer and inner cores are made almost entirely of nickel and iron. The inner core is solid, whereas the outer core is liquid. Unlike the inner core, the outer core is not under enough pressure to condense it into solid metal. Instead, it remains in a liquid form surrounding the inner core. However, the liquid metal form of the outer core is also caused by its extremely hot temperature, which is about four times hotter than lava. The outer core was also measured to be about 50 times stronger than the Earth’s magnetic field at the surface.

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Related Questions

  • Q:

    How do we know the Earth has a liquid core?

    A:

    The biggest reason scientists theorize that the Earth has a liquid outer core and a solid iron inner core is that shear seismic waves, which cannot move through liquid, disappear when they hit the outer core only to reappear in the inner core. By measuring how both shear and pressure seismic waves travel through the core, scientists are not only able to determine the makeup up the inner and outer cores, but also their respective sizes.

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  • Q:

    What is the outer core?

    A:

    The outer core is part of the core, which is one of the three major layers of the Earth. The core is the deepest and hottest layer and is mostly composed of metals, and it is beneath the Earth's mantle. The outer core is the first layer of the core, and it extends to a depth of approximately 2,890 kilometers below the Earth's crust and measures 2,300 kilometers thick.

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  • Q:

    What are some interesting facts about the Earth's mantle?

    A:

    The mantle is the largest of the geological layers that make up the Earth. It is found beneath the crust and is about 1,800 miles thick. Surrounding the core, the mantle makes up about 84 percent of the volume of the Earth.

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  • Q:

    What is the temperature of Earth's inner core?

    A:

    The temperature of Earth's inner core is estimated to be between 9,000 to 13,000 degrees Fahrenheit, as stated by National Geographic. The planet's innermost region is primarily made up of a solid iron composition due to extreme levels of pressure.

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