How do we know that the outer core of the Earth is liquid?
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Earth consists of four major layers: the crust, mantle, outer core and inner core. While most of the layers are made of solid material, there are several pieces of evidence suggesting that the outer core is indeed liquid. read more
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The Earth is an oblate spheroid. This means it is a slightly"squished" sphere. It is shaped this way due to the rotation of the Earth on its axis. read more
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Earth's Outer Core
www.universetoday.com
Why does the Earth have a liquid core? – Starts With A Bang
scienceblogs.com
