The term "core" in science can refer to several things depending on the context, but one significant meaning relates to the Earth's structure.
The Earth's Core
According to geological science, the core refers to the innermost part of the Earth. This region is located below the mantle and is primarily composed of iron and nickel.
Structure of the Earth's Core
The Earth's core is further divided into two distinct layers:
- Outer Core: A liquid layer starting at a depth of approximately 2,898 km (1,800 mi).
- Inner Core: A solid layer starting at a depth of about 4,983 km (3,090 mi).
| Layer | Depth (km) | State | Composition |
|---|---|---|---|
| Outer Core | 2,898 | Liquid | Iron and Nickel |
| Inner Core | 4,983 | Solid | Iron and Nickel |
The Earth's core plays a crucial role in generating the planet's magnetic field through the movement of molten iron in the outer core, a process known as the geodynamo.
