GEOLOGY

Detailed explanation-1: -Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal-specifically, iron and nickel. The shorthand used for the core’s iron-nickel alloys is simply the elements’ chemical symbols-NiFe. Elements that dissolve in iron, called siderophiles, are also found in the core.

Detailed explanation-2: -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.

Detailed explanation-3: -It’s generally well known that the innermost part of Earth is made mostly of iron (about 85%). Nickel accounts for about 10%. That last 5% however, has remained a bit of a mystery.

Detailed explanation-4: -Earth’s core was formed very early in our planet’s 4.5 billion-year history, within the first 200 million years. Gravity pulled the heavier iron to the centre of the young planet, leaving the rocky, silicate minerals to make up the mantle and crust.

Detailed explanation-5: -Deep inside Earth, near its center, lies Earth’s core which is mostly made up of nickel and iron. Above the core is Earth’s mantle, which is made up of rock containing silicon, iron, magnesium, aluminum, oxygen and other minerals.