Here's why:
* Basalt and granite are rock types, not Earth layers. The Earth is divided into several layers based on their composition and physical properties. These layers are:
* Crust: The outermost layer, composed of relatively light, solid rock. It's further divided into oceanic crust (mostly basalt) and continental crust (mostly granite).
* Mantle: A thick layer of mostly solid rock (though behaving like a very viscous fluid over long periods).
* Outer Core: Liquid iron and nickel.
* Inner Core: Solid iron and nickel.
* Basalt and granite are found in the Earth's crust. Basalt is the dominant rock type in the oceanic crust, while granite is more common in the continental crust.
* The deeper layers of the Earth are made of different materials. The mantle is composed of a rock called peridotite, and the core is made of iron and nickel.
So, while basalt and granite are important components of the Earth's crust, they don't represent the entire Earth's structure.
