The Thinnest Layer of the Earth is Called as?

The thinnest layer of the Earth is known as the crust. It is the outermost solid layer of our planet and forms the surface on which we live. Compared to the other internal layers of the Earth—the mantle and the core—the crust is extremely thin and fragile, yet it plays a vital role in Earth’s geology.

Structure of the Earth

The Earth is made up of four main layers:

Layer	Position	Thickness	State	Key Features
Crust	Outermost	5–70 km	Solid	Thinnest layer; includes land and ocean floors
Mantle	Below the crust	~2,900 km	Semi-solid	Contains molten rock (magma)
Outer Core	Below the mantle	~2,200 km	Liquid	Made mostly of iron and nickel
Inner Core	Center of the Earth	~1,220 km	Solid	Extremely hot and dense

More About the Earth’s Crust

Types of Crust:

• Continental Crust: Thicker (up to 70 km) and less dense.
• Oceanic Crust: Thinner (around 5–10 km) but denser.

Composition: Primarily made of igneous, metamorphic, and sedimentary rocks, rich in silicon, oxygen, aluminum, and iron.

Importance:

• Supports all life forms.
• Contains soil, minerals, fossil fuels, and other natural resources.

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