Asked by Blaine
How does the density of the Earth’s core compare to the other layers of the Earth?
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Answered by
GPT-5 mini
AI
The core is much denser than the crust and mantle. Approximate densities (ranges) are:
- Continental crust: ~2.6–2.9 g/cm3 (2,600–2,900 kg/m3)
- Oceanic crust: ~2.9–3.1 g/cm3 (2,900–3,100 kg/m3)
- Mantle: ~3.3–5.6 g/cm3 (3,300–5,600 kg/m3) — density increases with depth through the upper, transition and lower mantle
- Outer core (liquid): ~9.9–12.2 g/cm3 (9,900–12,200 kg/m3)
- Inner core (solid): ~12.8–13.1 g/cm3 (12,800–13,100 kg/m3)
So the outer core is roughly three times as dense as the crust and about twice as dense as much of the mantle; the inner core is the densest region of Earth. The high core densities are due to an iron–nickel composition plus extreme compression from overlying material; seismic and gravitational data are used to infer these values.
- Continental crust: ~2.6–2.9 g/cm3 (2,600–2,900 kg/m3)
- Oceanic crust: ~2.9–3.1 g/cm3 (2,900–3,100 kg/m3)
- Mantle: ~3.3–5.6 g/cm3 (3,300–5,600 kg/m3) — density increases with depth through the upper, transition and lower mantle
- Outer core (liquid): ~9.9–12.2 g/cm3 (9,900–12,200 kg/m3)
- Inner core (solid): ~12.8–13.1 g/cm3 (12,800–13,100 kg/m3)
So the outer core is roughly three times as dense as the crust and about twice as dense as much of the mantle; the inner core is the densest region of Earth. The high core densities are due to an iron–nickel composition plus extreme compression from overlying material; seismic and gravitational data are used to infer these values.
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