A molecule of water consists of 3 atoms. 2 hydrogen atoms and one oxygen atom. They have an imbalanced structure, so they stick to and attract various substances. It is a chemical, tasteless, odourless, colourless, transparent substance. It is chemically expressed as H2O. It is also used in fertilizer production. Its boiling point is 100 degrees Celsius and 0 degrees Celsius is its melting point. In the phase of sweating, digestion, and during breathing body loses water content.
Man-made source of water
Man-made sources of water are reservoirs, dams, canals, tube wells. Natural water sources are rivers, oceans, streams, lakes, rainwater, springs & ponds.
- Rain Water
In the form of surface and groundwater, it is stored on the earth.
- Surface Water
Water on the earth surface such as seas, lakes, rivers, ponds, and streams are considered surface water. The water collects rainwater from rivers and lakes and is refilled. Another cause of surface water is the melting of snow on hills.
- Underground Water
Due to the presence of water, life exists on earth. Nearly three-quarters of the surface of the earth consists of water.