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Sorted by: 31. +50. Earth's inner core is solid even though the temperature is so high because the pressure is also very high. According to the Wikipedia article on the Earth's inner core, the temperature at the center is 5, 700 K 5, 700 K and the pressure is estimated to be 330 330 to 360 GPa 360 GPa (∼ 3 ⋅106 atm ∼ 3 ⋅ 10 6 atm).
Obviously because the inner core is solid but the outer core is liquid, we must conclude that the drop in temperature vs the drop in pressure must be lower than the gradient of 16 degrees/GPa shown in the diagram below (link to source), given that at the outer-core temperature has exceeded the melting point of iron/nickel, which is a function ...
The iron-nickel alloy that composes the inner core is heavier than other elements in the mantle and outer core, causing it to sink to the center of earth. B. Since both iron and nickel and attracted to magnets earth's magnetic field drew the to metals into the inner core mixing them into the alloy. C. Earth started as a giant asteroid composed ...
The inner core is solid due to the immense pressure at the Earth's center, which keeps the iron and nickel in a solid state despite the high temperatures. The outer core is liquid because it ...
12. The two major constituents of the Earth's core are iron and nickel. In documentaries and scientific conversations, iron gets more attention than nickel, probably because it makes up a bigger percentage of the core. But before I consider this scenario—where it was nickel that makes up the bigger percentage instead of iron—I must ask:
This other post has a thorough explanation as to why. Now that the Earth has cooled somewhat, pressure deep in the Earth increases local density by forcing liquids (e.g. the liquid outer core) into a solid state (the solid inner core), and then as the pressure increases, solids shift into new, more tightly packed crystal structures.
The inner core of the Earth, its innermost hottest part as detected by seismological studies, is a primarily solid ballabout 1,220 km (760 mi) in radius, or about 70% that of the Moon. It is ...
A partial molten core is necessary for a strong magnetic field - this will help shield the Earth's surface from cosmic radiation. – winwaed. Apr 17, 2014 at 0:41. 1. According to wikipedia the temperature is around 5600K so ~5300°C. – hugovdberg. Apr 17, 2014 at 6:47. since it drives plate tectonics yes it is necessary for current oxygen ...
Interestingly enough, the earth is cooling. And the inner core / outer core boundary is a freezing front (meaning turning from a liquid outer core to a solid inner core). Though, it is a very hot freezing front.
Instead, it keeps the outer core molten while the inner core remains solid. Overall, the solidness of the inner core is a result of the balance between high pressure and temperature, with pressure being the dominant factor in maintaining its solid state despite increasing temperature. Learn more about the inner core of the Earth's solid state here: