Our hydrosphere plays a very important rule in the substance and development life, because of it the earliest living organisms emerged. Also human life begins in water, without water we are nothing. First of everything do we know what is truly a hydrosphere and what do it meant?
Hydrosphere comes from a Greek word hydro means "water" describes the collective mass of water.
Liquid water is colorless, odorless, tasteless, has a freezing point of 0 degrees Celsius and a boiling point of 100 degrees Celsius at one atmosphere. Also water has different process the melting, sublimation, evaporation, freezing, condensation, deposition. Melting is the process which a solid changes to liquid, it requires absorption of 80 calories of heat for every gram of water. The sublimation is a term used to describe the change from solid to gas without passing the liquid phase, the reverse process where vapor changes to solid is deposition. The evaporation is a process of changing liquid water into vapor state. Freezing is the process which is changing liquid to solid. Condensation is the process of water vapor changing to the liquid state.
About 3% of the earth surface water is fresh water; the
rest 97% is stored in ocean as saltwater.
Water is a rather unusual earth material because it can exist in all phases of matter. It could be found as a liquid in the ocean, as a solid like glaciers and in gas in the atmosphere.