Question

Earth surface is considered ad

Answer 1

Crust :

• Earth surface is also known as crust it is made by Sia and Seema it is the uppermost layer of Earth.

• Most of the Earth surface, about 70%, is covered with water. Underneath the water that fills the oceans, and the dirt and plants that cover the continents, the Earth's surface layer is made of rock. ... This outer layer formed a hard, rocky crust as lava cooled about 4.5 billion years ago....

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Answer 2

Answer:

Electric potential is defined as the potential difference between two points. So, electric potential at a point is defined with respect to a reference point. We take potential at the surface of earth as reference and is defined as zero. By convection, electrostatic potential of earth is taken to be zero. It is considered that earth is a storehouse of infinite negative charges. So, ,most points are at a positive potential w.r.t it.

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