Re:All of Earth's water in a single sphere
by arrowleaf on Tuesday August 13, 2024 @06:14PM
(#41240388)
You'd have to use the volume of earth, not the mass. Google tells me that lava is ~3x denser than water.
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Re:All of Earth's water in a single sphere
by rachofsunshine on Tuesday August 13, 2024 @06:29PM
(#41240516)
Lava is not really representative of the Earth as a whole, as it turns out. The mantle (which is the vast majority of Earth's volume) isn't a liquid, it's a squishy deformable solid. Magma that comes from the mantle is only liquid because of the removal of pressure or the addition of water; it wasn't liquid down there. And a lot of lava comes from crustal melting, not mantle material.
Earth as a whole has a density about 5.5x that of water.