The topmost layer of Earth is called the Crust.
Characteristics:
1. It is the topmost part of the earth’s surface.
2. Its thickness is found to vary under the continents and the oceans which is 30 km and 5 – 10 km respectively. According to the height in mountainous areas, its depth varies.
3. This layer is made of heavy rocks. Its density is 3 grams per cubic centimeter.
4. Ba-salts terraces of crust are built below the oceans.
5. It has been divided into two parts – inner crust and outer crust.