In geography, the core, mantle and crust of a planet are defined by differences in their density.
When we are referring to the rocky portion of the Earth, there are three layers of the Earth. However, the planetary rock called the Earth does not just consist of the rocky layers which is where the complexity arises.
The Earth's layer's names are as follows:
As well as individual layers of each of the three layers of the rocky Earth, the Earth plant consists of many layers of the atmosphere, the gaseous bubble surrounding the planet. That is, out Earth's atmosphere is made up of five layers that extend 10 miles out from the surface of the planet.
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