Water is very significant resource of the Earth surface. It is a unique feature of our planet. It is essential for human beings, plants and animals. Can we imagine our life without water? In fact, without water life is not possible.Earth is also called the Blue Planet as 71% of its surface is covered by water and only 29% is land. That part of the Earth that is covered by water is called the hydrosphere.Water is found as ice sheets in glaciers.
It is found as flowing water in the oceans, rivers, lakes, ponds and underground streams. It is also found as water vapour in the atmosphere.The total amount of water on the Earth’s surface is estimated to about 1,250 million cubic km. Most of this water (about 97 per cent) is in the oceans. The total amount of water present on the Earth is fixed and it is approximately the same as it was during the Ice Age. Why? Read on to know it.
