The hydrosphere includes all water on Earth. Not a drop of liquid water can be found anywhere else in the solar system. Water is the universal solvent and the basis of all life on our Planet. Water cycles between the various components of the Earth system via the hydrologic cycle.
Water is transferred between the hydrosphere and biosphere by evaporation and precipitation.
Energy is also exchanged in this process. Terrestrial plants withdraw water from the ground using their root systems and transport water and nutrients through the vascular system to stems and leaves. By the process of erosion, water sculpts the surface of the Earth as precipitation that falls on the land makes it way by to the sea. The geomorphology of the Earth is unique because of running water. Runoff channels on Mars suggest that it had free-flowing water early in its history when climate was warmer.