Where did Earth's Iron core come from and how did the mantle become molten?

I can blather, too, though I'm sort of short-winded. But the following won't be blather:Some 4,570 million years ago or so, the early sun had a disk-shaped nebula of dust and gas. The gas was largely hydrogen, helium, carbon monoxide, carbon dioxide, methane, and a few inert gases. The dust was largely oxides and silicates of metals: calcium, magnesium, aluminum, iron, manganese, etc. Iron was pretty prominent because it's the ultimate "ash" of a supernova - iron-56 is at the bottom of the energy well of all atomic nuclei.As the sun started really heating up, most of the dust and gas got blown off into space. A good fraction of the dust, though, suffered from "static cling" and stuck together into BB to marble-sized grains. These collided gently under gravitational forces until there were a BUNCH of objects about the size of present-day asteroids -100 to 1000 km across or so. These got hot as they did so from kinetic energy being converted to heat and from the heat of radioactive decay of aluminum-26 and the like.The molten iron (and other, less abundant heavies) drained to the middle of these planetesimals. The planetesimals collided until they built up planet-sized bodies, which were essentially molten due to all the kinetic energy that went into their formation. Iron and other heavyweight stuff drained to the centers; a slag of silicates and oxides floated to the exteriors.We know this partly because the inner planets have densities of about 5.5 g/cc. The (silicate) rocks up on top have densities below 4. Something in the middle obviously is denser than 5.5, and iron is 1) nearly 8 g/cc and 2) abundant enough in stardust to be that material. We know that last bit because we have the meteorites and the dust from space missiond to analyze to show it.Edited by Coragyps, : tpyos

Are you aware of anything at all outside of mathematics that can be "absolutely proven?" I'm not.And there's no need to shout.

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"The wretched world lies now under the tyranny of foolishness; things are believed by Christians of such absurdity as no one ever could aforetime induce the heathen to believe." - Agobard of Lyons, ca. 830 AD

Peg - there is no such verse, as there is no verse saying the moon is not made of Marmite. But Genesis 1:9 does have the dry land all stirred up among the waters (the waters below the firmament, now), so I don't think the land could have been much hotter than boiling. Certainly not molten.

"Easily" if you don't read on to verse 16-17 where the Sun and Moon and stars were created and stck onto the firmament on Day #4.It's your book, Peg - read it.

That being God's house and the house for people, animals, etc. The fourth day is when the sun, moon, and stars were made and stuck to the firmament. Read your book. That's what it says.