While we can't directly observe the Earth's core, scientists have gathered evidence through various methods, including:
* Seismic waves: The way seismic waves travel through the Earth provides information about the density and composition of different layers.
* Meteorites: Some meteorites are thought to be remnants of early planetary cores, providing clues about the composition of Earth's core.
* Earth's magnetic field: The Earth's magnetic field is generated by the movement of molten iron in the outer core.
It's important to note that the Earth's core is not actually molten metal in the same way as a liquid. It's in a state called solid-state plasma, where the atoms are tightly packed but can still move freely.
