7th Class Science Sample Paper Science Sample Paper - 1

  • question_answer
                            The terms sewage, sewers and sewerage are interlinked with each other. Can you explain how?

    Answer:

    (i) Sewage ? mixture of wastewater coming out of homes and other places.
    (ii) Sewers ? pipes which carry sewage.
    (iii)  Sewerage ? network of sewage carrying pipes.                                                                                   
    Cleaning of water is a process of removing pollutants from water before it enters a water body or is reused. This process of waste water treatment is commonly known as sewage treatment. It takes place in several stages. Sewer means the small pipes which carry waste water from the point of production to the main-hole sewerage means the underground networks of small and big pipes which carry sewage from the point of production to the point of disposal. In this way sewage & sewerage are interlinked.            


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