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The inner core is hotter than the outer core thus the pressure is more on inner core the main constituent of the core, INCREASES as the pressure goes up. So,because the pressure effect overrides the temperature effect, the inner core is solidified.
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The inner core is hotter than the outer core thus the pressure is more...
Explanation:

The Earth's core is divided into two parts: the inner core and the outer core. The inner core is a solid sphere, while the outer core is a liquid layer. The two regions are separated by the Bullen discontinuity.

Temperature and Pressure:

The temperature of the inner core is around 5500 degrees Celsius, which is hotter than the outer core. However, the pressure in the inner core is much higher than the pressure in the outer core. At such high pressures, the main constituent of the core, iron, behaves differently from what we are used to on the surface of the Earth.

Effect of Pressure:

As the pressure increases, the iron atoms become more tightly packed, and the electrons inside the atoms begin to move more freely. This process is called electron degeneracy. The effect of electron degeneracy is to reduce the thermal energy of the atoms, making it harder for them to move around and form a liquid.

Effect of Temperature:

On the other hand, the effect of temperature is to increase the thermal energy of the atoms, making them more likely to move around and form a liquid. However, at the high pressures found in the inner core, the effect of pressure overrides the effect of temperature, and the iron atoms become tightly packed enough to form a solid.

Conclusion:

In summary, the inner core of the Earth is solidified because of the high pressure caused by the weight of the overlying material. The effect of pressure is to reduce the thermal energy of the iron atoms, making it harder for them to move around and form a liquid. As a result, the iron atoms become tightly packed enough to form a solid, even at the high temperatures found in the inner core.
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The inner core is hotter than the outer core thus the pressure is more...
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The inner core is hotter than the outer core thus the pressure is more on inner core the main constituent of the core, INCREASES as the pressure goes up. So,because the pressure effect overrides the temperature effect, the inner core is solidified.
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