GEOLOGY

Detailed explanation-1: -Outer Core The outer core, about 2, 200 kilometers (1, 367 miles) thick, is mostly composed of liquid iron and nickel.

Detailed explanation-2: -Inner Core: The innermost part of Earth is the core and is about 1500 miles (2414 km) thick. Both the inner and outer cores consist primarily of iron and nickel. They’re extremely hot, with temperatures ranging from 7200–9000℉ (4000–5000℃).

Detailed explanation-3: -The Mantle: The mantle is the thickest layer of the Earth, making up about 82% of its volume. The mantle is composed primarily of heavy metals, such as iron, nickel, magnesium, and others.

Detailed explanation-4: -Many geologists believe that as the Earth cooled the heavier, denser materials sank to the center and the lighter materials rose to the top. Because of this, the crust is made of the lightest materials (rock-basalts and granites) and the core consists of heavy metals (nickel and iron).

Detailed explanation-5: -About 1.5 billion years ago, the Earth had an unfathomably hot core that was violently losing heat. Then, after having cooled sufficiently, part of it solidified and sunk beneath the ocean of the rest of it, taking much of the planet’s iron and nickel with it. Thus, the inner core and the outer core were born.