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Water precious resource
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- 2. .Water is anatural resouce that is vital for both plants and animals. .Water exists in abundance on our planet earth.
- 3. Forms of water .Thereare three states of water,they are solids,liquids and gaseous. .Here is a diagram of Forms of water.
- 4. Water cycle What isWater cycle? .The continuous circulation of water in nature is called water cycle.
- 5. .Evaporation-The conversation ofliquid to vapour is called evaporation. .Condensation-The conversation of vapour to liquid is called condensation. .Precipitation-The falling down of water from clouds is called precipitation. .Transpiration-The loss of water through water vapour is called transpiration.
- 6. Uses of water .Theuses of water can be broadly divided into agricultural,domestic and industrial uses.
- 7. Agricultural Use .Water isused for irrigating fields through canals,pipelines and drip irrigation. .Nearly 60% of the indian population depends on agriculture for their living,and uses nearly 90% of all water for irrigation.
- 8. Percentage of watervaries in different living organisms. Tree:60%,Tomato:90%,Eleplant:80%
- 9. Domestic use .Water isused for cooking,bathing,cleaning,etc… .Water is supplied by the municipality or from wells/bore wells.
- 11. Industrial Use .Water isused in industries as a raw material,solvent,coolant and for making electricity.. .Solvent:Any substances that can dissolve is called solvent. .Coolant:A liquid that is used for cooling a machine.
- 12. Sources of water .Precipitationin the water form of rain or snow provides fresh water to our planet earth. .Most of the fresh water returns to the ocens through rivers flowing across the globe. The various sources of water can be divided into two main categories. .Surface water .Underground water or subsoil water.
- 13. Surface water .Water presenton the surface of the earth is called surface water. .It can be classified into three, .Rain water .River and lake water .Sea and ocean water
- 15. River and lakewater .The water in these water bodies comes either from rainfall or melting of snow(glaciers) on the mountains.
- 16. Sea and oceanwater .Oceans are a huge store of water. .Millions of litres is present in them.but the water is salty and is not fit for any domestic or agricultural use.
- 17. Underground water orsubsoil water .Ground water is the water the groung where the soil is completely filled or saturated with water. .Rainwater seeps through topsoil and layers of rocks like limestone,stone and gravel and gets collected on top of non-porous layers. .The top level of this underground water is called water table.Underground water is called and aquifer.
- 18. Under ground wateror aquifer
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- 20. Scarcity of water .Scarcityof water is defined as a situation where there is insufficient water to satisfy normal requirements.hrough water is a renewable resource,the factors of scarcity of water are. .Increasing population. .Increasing industries. .Agricultural activities. .Deforestation. .Water scarcity will result result in insufficient and famine.
- 21. Some causes ofwater scarcity .In India some causes of water scarcity are: .Uncontrolled use of bore weel technology for extracting groundwater. .Pollution of freshwater resources. .No effective measures for water conservation.
- 22. Effects of waterscarcity on plants .You must have seen potted plants wilting and ultimately drying up if they did not get water even for a few days. .Plantss need water to get nutrients from the soil to prepare their food. .So just image the consequences if water is not available to plants. .The effets of water scarcity on plants are stunted growth,decreased food production and famine.
- 23. Conservation of water .wecan save water by .Avoid wastage .Water the plants
- 24. Conservation of water .Watersaving practices and given below, .Households can save water by promptly fixing leaks. .Recycling of water is very important.
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