The Earth is composed of three main layers: Crust, Mantle, and Core. Each layer differs in composition, thickness, and physical state.
1. Crust
The outermost layer of the Earth.
It is the thinnest layer (about 570 km).
Two types:
Continental Crust thicker, mainly made of granite.
Oceanic Crust thinner, mainly made of basalt.
It is solid and forms the surface where we live.
2. Mantle
Located below the crust, extends up to about 2900 km.
It is the thickest layer of the Earth.
Divided into:
Upper Mantle
Includes Lithosphere (rigid) and Asthenosphere (semi-molten).
The asthenosphere allows plate movement.
Lower Mantle (Mesosphere)
Mostly solid due to high pressure.
Contains magma chambers and is responsible for volcanic activity.
3. Core
The innermost layer, extending from 2900 km to 6371 km.
Composed mainly of iron and nickel (Ni + Fe).
Divided into:
Outer Core
Liquid state
Causes Earths magnetic field.
Inner Core
Solid state
Due to extremely high press
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