What is the main component of the Earth's core?

The main component of the Earth's core is iron. The Earth's core is divided into two parts: the inner core and the outer core, both of which are primarily composed of iron. The inner core is solid due to the immense pressure found at the center of the Earth, while the outer core is liquid, allowing for the movement that generates the planet's magnetic field.

In addition to iron, the core also contains some nickel and lighter elements, but iron is the predominant element. This composition is crucial to understanding the dynamics of the Earth's geology and magnetic properties. Nickel, although a significant component, is secondary to iron in terms of abundance. Gold and copper, while familiar elements, are not significant constituents of the core's composition and are found in much lesser quantities in the Earth’s crust and surface materials. Understanding the core’s composition is essential for geophysical studies and for explaining various geological phenomena.