hydrosphere & Biosphere

hydrosphere A hydrosphere is the total amount of water on a planet .Hydrosphere includes Water that is on surface of planet ,underground and in air. Hydrosphere forms over 70 per cent of the earth’s surface . In terms of area, it comes to 3,62,000 km2. Water is found in the oceans as well as on land & Life is made possible on earth due to the availability of water. The hydrosphere has a direct influence on weather and climate conditions on Earth. This occurs due to the important role played by the worldwide oceanic circulations. The average depth of oceans is around 3.7 km. The floor of the oceans has mountain ranges and valleys, isolated volcanic peaks, and vast plains. Many of these mountain ranges and valleys exceed in size of their counterparts on land. As on date , less than 10 per cent of the ocean floor has been surveyed . Water has a number of unique properties like high heat capacity, dissolving capacity, etc. These properties are made possible due to its molecular structure. A water molecule consists of two atoms of Hydrogen that are bound to an oxygen atom.(H20) BIOSPHERE Basically, biosphere is a thin envelop that encircles most of the earth, and supports life. It is the global sphere in which the biota interacts with lithosphere, atmosphere and hydrosphere. It is totally dependent on, and involves complex interactions between the atmosphere, hydrosphere, and lithosphere. Biosphere is the spherical terrestrial layer that comprises of the lower part of the atmosphere. the seas and the upper layers of the soil wherein living organisms exist naturally. All forms or life including human beings dwell in biosphere. The health of the biosphere is determined by the availability of oxygen, moisture, temperature, air pressure and soil