* Core: The core is primarily composed of iron with a small percentage of nickel and other elements. It has a density of around 10-13 g/cm³.
* Mantle: The mantle, composed of silicate minerals, has a density ranging from 3.3 to 5.5 g/cm³.
* Crust: The crust, the Earth's outermost layer, is the least dense, with a density of 2.7 to 3.0 g/cm³.
Why is the core so dense?
* Composition: The core is mostly iron, a very dense element.
* Pressure: The immense pressure at the core compresses the atoms, making the core denser than any other layer.
Let's put it in perspective:
Imagine a small marble weighing the same as a large beach ball. That's the difference in density between the core and the crust!
The high density of the core plays a crucial role in:
* Earth's magnetic field: The molten iron in the outer core generates Earth's magnetic field, which protects us from harmful solar radiation.
* Plate tectonics: The denser core drives convection currents in the mantle, which are responsible for plate tectonics and the movement of continents.
So, the Earth's core is not only the hottest, but also the densest layer, playing a fundamental role in shaping our planet.
