Crust, mantle, and then core.!(:
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The Earth's compositional layers in order of increasing density are the crust, mantle, outer core, and inner core. The crust is the least dense layer, while the inner core is the most dense layer.
The layers of Earth's interior from least to greatest density are: Crust Mantle Outer core Inner core
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Density of air decreases on increasing height, hence we categorize the atmosphere into different layers from Troposhere to Ionosphere at particular kilometers respectively.
Earth's average density is about 5.52 grams per cubic centimeter. This density is determined by the distribution of material in Earth's layers, with the denser iron-nickel core contributing to the overall value. Earth's density is higher than that of most other planets in our solar system.
Mechanical layering of the earth: - Lithosphere (solid/rigid), 0-150km - Asthenosphere (solid/elastic), 150-660km - Mantle (solid/rigid), 660- 2900km - Outer core (liquid), 2900-5730km - Inner core, 5730-6400km Chemical layering of the earth: - Crust (oceanic and continental), 0-40km - Mantle, 40-2900km - Core, 2900-6400km