Go To: TNSB-Science-Grade 7
[Contributor - Rini Jose]
http://tnschools.gov.in/media/textbooks/7th_Science_Social_Science_Term_II_English_Combined_20-07-2019.pdf#page=40 (English)
http://tnschools.gov.in/media/textbooks/7th_Science__Social_Science_Term_II_Tamil_Combined_18-08-2019_QczXWAG.pdf#page=46 (Tamil)
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