The hydrosphere is defined as the total mass of water found on, beneath, and above the surface of a planet, minor planet, or natural satellite.
Despite the fact that the Earth’s hydrosphere has been existing for roughly 4 billion years, it is still changing shape.
This is created by seafloor spreading and continental drift, which causes the land and ocean to reorganize.
This encompasses both liquid and frozen water in groundwater, seas, lakes, and streams.
Fresh water contributes for only 2.5 percent of this total, whereas saltwater accounts for 97.5 percent. 68.9 percent of this fresh water is in the form of ice and permanent snow cover in the Arctic, Antarctic, and mountain glaciers; 30.8 percent is in the form of fresh groundwater; and just 0.3 percent is in conveniently accessible lakes, reservoirs, and river systems.