Is the Earth's core solid, liquid, or gas? - Quora
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Answer (1 of 7): The outer core (between ~1220 km to ~3400 km from the Earth’s center) is theorized to be liquid, while the inner core (less than 1220 km from the center) is solid. This is based on seismic data, where the inner ore has been observed to reflect seismic waves.
What is the inner core made of? - Quora
Why is the inner core solid, the outer core liquid, and the mantle solid/plastic? - Quora
How does the Earth's core look like? - Quora
Is there more water under the crust than on the surface of the earth? - Quora
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Is the Earth's core solid, liquid, or something else? - Quora
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