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www.GOALias.blogspot.com(a)(b)Boojho wondered why therewas a difference in theabsorption of water in thetwo squares.(c)(d)Can you suggest which type of soilwould be the best for making pots, toysand statues?9.4 PROPERTIESOF SOIL(e)Fig. 9.4 Working with the soilYou have listed some uses of soil. Let usperform some activities to find thecharacteristics of the soil.Percolation rate of water insoilBoojho and Paheli marked two differentsquares of 50 cm 50 cm each, one onthe floor of their house and the otheron the kutcha (unpaved) road. They filledtwo bottles of the same size with water.They emptied the water from the bottles,one each, at the same time in the twosquares. They observed that the wateron the floor flowed down and was notabsorbed. On the kutcha road, on theother hand, the water was absorbed.Now let us perform an activity tounderstand this.Activity 9.4For this activity divide yourself intothree teams. Name the teams A, B andC. You will be finding out how fast thewater passes down the soil. You willneed a hollow cylinder or a pipe. Ensurethat each team uses pipes of the samediameter. Some suggestions forobtaining such a pipe are given below:1. If possible, get a small tin can andcut off its bottom.2. If PVC pipe (approx. diameter 5 cm)is available, cut it into 20 cm longpieces and use them.At the place where you collect the soil,place the pipe about 2 cm deep in theground. Pour 200 mL water in the pipeslowly. For measuring 200 mL water youcan use any empty 200 mL bottle. NoteFig. 9.5 Measuring rate of percolation100SCIENCE