NCERT - 7 - Science :: Wastewater Story

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Go To: NCERT-Science-Grade 7


[Contributor- Anu Nived]

Objective: To teach the students about waste water and how it can be recycled

Subtopics to be covered:

  1. Sewage
  2. Wastewater Treatment Plant
  3. Good house keeping practises

Learning Outcome:

  1. Students know that waste water can be recycled and used again
  2. They know how the waste water can be recycled
  3. They know how the waste/pollutants can be minimised
  4. They know the importance of proper sanitation

[Contributor- Kripa S]

(Source - Smart Learning for All) (English - water pollution)

[Contributor- Kripa S] (wastage of water example 1) (wastage of water example 2)

[Contributor- Kripa S]

1.Divide yourself into groups to perform the activity.

a) Fill a large glass jar 3/4 full of water. Add some dirty organic matter such as grass pieces or orange peels, a small amount of detergent, and a few drops of an ink or any colour.

b) Cap the jar, shake it well and let the mixture stand in the sun for two days.

c) After two days, shake the mixture. How does it smell?

d) Use a filter paper/ Cotton cloth to filter this mixture. What remains? What is the colour?

[Contributor - Fathima Nazar]

Term Transliterated Term Translated Term
Aeration एरेशन वातन
Aerobic bacteria एरोबिक बैक्टीरिया वायवीय जीवाणु
Anaerobic bacteria अनेरोबिक बैक्टीरिया अवायवीय जीवाणु
Contaminant कंटामिनेंट दूषित पदार्थों
Sanitation सनिटेशन स्वच्छता
Sewage सयुविच वाहित मल
Sewer स्युवेर गंदा नाला
Sewerage सीवरेज मल प्रवाह पद्धति
Sludge स्लज कीचड़,
Wastewater वेस्ट वाटर अपशिष्ट जल
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