The structure of the Earth can be compared to an onion, consisting of multiple layers stacked upon one another, each with its own unique properties and compositions.

Crust

Description: The Earth’s crust is the outermost layer. This is the layer we live on and is where all landforms, oceans, and life forms exist.

Thickness: The crust varies in thickness, being approximately 35 km thick beneath the continents (continental crust) and around 5 km thick beneath the oceans (oceanic crust).

Composition:

1.Continental Crust: Mainly composed of silica and alumina. Due to this composition, it is termed as sial (si–silica and al–alumina).