NCERT - 7 - Science :: Wastewater Story
Go To: NCERT-Science-Grade 7
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[Author - Kripa S]
http://epathshala.nic.in/wp-content/doc/book/flipbook/Class%20VII/0759-Vigyan/Chapter%2018/index.html (NCERT Hindi Medium)
http://epathshala.nic.in/wp-content/doc/book/flipbook/Class%20VII/0758-Science/Chapter%2018/index.html (NCERT English Medium)
https://drive.google.com/open?id=0BzNF2YyqQxJ-SEV3ZFBOWVEybjQ (JEPC Board) (Hindi Medium)
[Author - Kripa S]
http://d2ouvy59p0dg6k.cloudfront.net/img/wasting_water_large_350396.jpg (wastage of water example 1)
https://im.rediff.com/getahead/2005/apr/04water.jpg (wastage of water example 2)
[Author - 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?
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