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www.GOALias.blogspot.comfollowing activity to estimate roughlythe relative amount of water availablein some of these sources.Activity 16.2Most of us assume water to be a limitlessresource. From this activity can youStepsFigureRemarkTake a medium-sized bucketand fill it up with water. Itcontains about twenty litres ofwater.Assume that this waterrepresents all the water presenton the earth.Take a tea spoon of about 5 mLcapacity and transfer 100spoons of water from the bucketto a small container, like a bathmug.This represents totalfreshwater on the earth.From the bath mug transferthirty spoons of water to a glasstumbler.This gives a measure of usablewater present as groundwater.Finally take out a quarter (1/4 th )spoonfull of water from the mug.It represents all the waterpresent in all the lakes andrivers of the world.• The water left in the bucket represents the saline water present in the seas,oceans and partly as groundwater. This water is not fit for human use.• The water left in the bath mug represents the water, which is present in thefrozen form in glaciers, ice caps and permanent snow; again not available readily.Boojho wondered about thealarmingly small quantity ofwater available for our use.Paheli quickly calculated andfound that this amount isroughly 0.006% of all waterfound on the earth.ATER: : A PRECIOUSWATERATER195RECIOUS RESOURCE195