GENERAL GEOLOGY

Detailed explanation-1: -However, the PRESSURE on the inner core is greater than the pressure on the outer core and the melting point of iron, 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.

Detailed explanation-2: -The inner core’s intense pressure-the entire rest of the planet and its atmosphere-prevents the iron from melting. The pressure and density are simply too great for the iron atoms to move into a liquid state.

Detailed explanation-3: -Earth’s inner core is solid because it is under such intense pressure from the weight of the entire planet that its atoms are held together by force. By contrast, the outer layers of Earth, while being slightly cooler (but still incredibly hot), have less pressure and thus their atomic form reverts to liquid.

Detailed explanation-4: -Despite its small volume (less than 1% of the Earth’s volume), the Earth’s inner core contains about 10% of the total magnetic field energy. It plays a crucial role in outer core liquid motions and the geodynamo, which generates the Earth’s magnetic field. Without the magnetic field, life on Earth would be impossible.

Detailed explanation-5: -The inner core is the most metal place on Earth-even more so than the outer core. Both are made mostly of iron, along with a smattering of nickel. But the iron is thought to also contain traces of lighter elements like oxygen, carbon, and silicon.