8th Class Science Sample Paper Science Sample Paper-9

  • question_answer   Explain traditional ways of purifying water to make it fit for drinking.                                                                        

    Answer:

    The traditional ways of purifying water to make it fit for drinking are as follows:
    (i) By filtering: This is a physical method of removing impurities. A popular household filter is a candle type filter.                                                                                        
    (ii) By boiling: When water is heated, it boils at a temperature of\[{{100}^{0}}C\]. At this high temperature, all the harmful micro-organisms or germs present in water are killed and it becomes absolutely safe for drinking. Many households use boiling as a method for obtaining safe drinking water.   
    (iii) Chlorination: It is commonly used chemical method for purifying water. It is done by adding chlorine tablets or bleaching powder to the water.


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