NCERT Class VII Science Solutions: Chapter 18-Wastewater Story Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 1:

Fill in the blanks:

  1. Cleaning of water is a process of removing ________.
  2. Wastewater released by houses is called ________.
  3. Dried ________ is used as manure.
  4. Drains get blocked by ________ and ________.

Answer:

  1. Cleaning of water is a process of removing pollutant.
As Showing in Images is a Pollutant
  1. Wastewater released by houses is called sewage.
As Showing in Images is a Sewage
  1. Dried sludge is used as manure.
As Showing in Images is a Result for Sludge
  1. Drains get blocked by oils and fats.
As Showing in Images is a Result for Oils and Fats

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