What is the composition of the outer core of the Earth?

The outer core of the Earth is primarily composed of molten iron and nickel, which gives it a liquid state. This layer is located beneath the mantle and above the inner core. The high temperatures found in the outer core, which can reach up to 4,700 degrees Celsius (8,500 degrees Fahrenheit), cause these metals to remain in a liquid form.

The liquid nature of the outer core is significant as it plays a crucial role in generating the Earth's magnetic field through the process of convection currents within the molten metal. This movement produces electrical currents, which in turn generate magnetic fields. Thus, understanding the liquid composition of the outer core is vital in explaining many geophysical processes, including plate tectonics and magnetic field dynamics.