Question

What is the name of the part that consists of all the water on earths surface

Answer 1

Hydrosphere contains of all the water on earth's surface.

. How hydrosphere formed :

Once the planet's surface had cooled sufficiently, water contained in the minerals of the accreted material and released at depth could escape to the surface and, instead of being lost to space, cooled and condensed to form the initial hydrosphere.