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🪐intro to astronomy review

Core

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

The core is the innermost layer of a planet, primarily composed of metal. It plays a crucial role in generating the planet's magnetic field.

5 Must Know Facts For Your Next Test

  1. Earth's core is divided into a solid inner core and a liquid outer core.
  2. The core is predominantly composed of iron and nickel.
  3. The temperature in Earth's inner core can reach up to 9,932°F (5,500°C).
  4. Convection currents in the liquid outer core create Earth's magnetic field.
  5. Seismic waves are used to study the structure and properties of Earth's core.

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