Discuss the different layers of Earth's interior with the help of a neat diagramme.

The Earth is made up of several layers, each with distinct physical and chemical properties. These layers vary in composition, temperature, and state of matter, and they play a crucial role in shaping the planet's geological activity. The Earth's interior is traditionally divided into four main layers: the crust, mantle, outer core, and inner core. A detailed understanding of these layers is essential for studying geological processes such as tectonics, volcanic activity, and earthquakes.

### 1. Crust  
The outermost layer of the Earth is called the crust, and it is relatively thin compared to the other layers. It is primarily composed of rocks such as granite (in the continental crust) and basalt (in the oceanic crust). The Earth's crust is solid, and it is divided into two types:

- Continental Crust: This is thicker, with an average thickness of about 35-40 km. It is primarily made up of granitic rocks and is less dense compared to oceanic crust.
  
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