The Earth's inner core is roughly 750 miles thick and it is primarily composed of iron. The iron in the Earth's core reaches temperatures as high as 13,000 degrees Fahrenheit, but remains a solid because of the intense s... More »

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... More » Science Earth Science Layers of the Earth

There is no way for the inner core of the Earth's temperature to be physically measured; however, according to mathematical equations based on what is known about the core, it is estimated that the core is approximately ... More »

The inner core is the Earth’s deepest layer, and it is a solid iron ball that is approximately 1,500 miles in diameter. Although it is extremely hot, the iron cannot melt due to the high pressure. The inner core also con... More »

The center of the Earth is called its inner core, which is solid and surrounded by the liquid outer core. The outer core is surrounded by the solid mantle layer, which moves in response to a temperature difference of at ... More »

Iron can be found in the Earth's core, in the Earth's crust, in hemoglobin, in steel and in magnets. It is rare to find iron in its elemental form on Earth, but it has been found in igneous rocks in Russia. More »

Earth is geologically active because its internal heat keeps the outer core and lithosphere molten, encouraging plate movement and volcanic activity. Earth's crust consists of tectonic plates floating atop the malleable ... More »