What keeps the fire going in the core of earth? Where does its oxygen come from?

Question

What keeps the fire going in the core of earth? Where does its oxygen come from?

Answer 1

there is no "fire" in the center of the earth

there is molten metal and magma

but thats the heat from the formation of the Earth

also from the great pressures under the crust

in the very center of the earth is a solid iorn core though, it is only solid because of the immense pressure holding it together.

Answer 2

although there is no fire, there is plenty of oxygen.  It is just attached to silica in minerals and is unavailable for reaction.

Answer 3

The core of the earth is not really fire, but it is extremely hot. Every bit of earth is pressing down on that single spot. The core of the earth is very little compared to the rest of the earth. This immense pressure causes the atoms in the materials of the core of the earth to start moving fast, which creates heat. When there are weak points in the earth (since heat rises) the hot magma tries to force its way up to the surface of the earth. This creates hot spots and volcanoes. When the magma reaches the center of the earth it turns to lava. The reason they call magma above the surface lava is for that exact reason, there is oxygen present. When oxygen comes in contact with the magma it bursts into flames and now it is on fire. Hope that clears up your question.

Answer 4

The earth's core is hot because it's essentially a nuclear reactor.  Decay of radioactive isotopes including uranium, thorium, and potassium produce the heat in a process called radiogenic heat.  235-U and 40-K were heat sources early in the earth's life, but 238-U and 232-Th are now the biggest contributors.  So there is no fire, and it doesn't need any oxygen.