This article is a concise version of following chapters for NCERT books from various classes. We have used techniques like tables, flow-charts, maps, diagrams and videos etc. to improve knowledge retention and recall .
- Class 3 – Water O’ Water!
- Class 4 – Too Much Water,Too Little Water
- Class 5 – Every Drop Counts
Water is a vital element in each of our lives. Not only is it essential to our health, but we also use it for numerous household tasks. Every day we use water for cooking, bathing, and cleaning, and drinking.
Sources of Water:
There are two main sources of water: surface water and groundwater.
Surface Water is found in lakes, ponds, rivers, waterfalls, streams, reservoirs and sea.
Groundwater lies under the surface of the land, where it travels through and fills openings in the rocks. The rocks that store and transmit groundwater are called aquifers. The level of water below ground is called the water table. Groundwater can be extracted from wells or tube wells or hand pump.
- About 70% of Human body is water.
- 97% of the water on the Earth is salt water, only 3% is fresh water.