How did the Earth's outer core form?

Answer 1

1. The outer core is the layer beneath the mantle. It is made ofliquid iron and nickel. Complex convection currents give rise to a dynamo effect which is responsible for the Earth's magnetic field. The outer core is a hot, electrically conducting liquid (mainly Iron and Nickel). This conductive layer combines with Earth's rotation to create a dynamo effect that maintains a system of electrical currents creating the Earth's magnetic field. It is also responsible for the subtle jerking of Earth's rotation. This layer is not as dense as pure molten iron, which indicates the presence of lighter elements. Scientists suspect that about 10% of the layer is composed of sulphur and oxygen because these elements are abundant in the cosmos and dissolve readily in molten iron.The outer core is in the range of 200 to The outer core is in the range of 200 to 300 kilometers (125 to 188 miles) thick and represents about 4% of the mantle-crust mass. This layer is sometimes identified as part of the lower mantle due to its geographical nature. However, studies on seismic discontinuities suggest that this "D" layer might differ chemically ROM the lower mantle lying above it.

Answer 2

The Earth's outer core formed through a process called planetary differentiation. As the Earth's interior melted from heat generated during its formation, denser materials migrated towards the center, creating the core. The outer core is primarily composed of molten iron and nickel, which remain in a liquid state due to the high temperatures and pressures present.