Grade 7 Science MCQ App Download - Importance of Water e-Book
Class 7 Science MCQs - Chapter 13
Apps:
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Scientists believe that eight out of ten people in under developed countries suffer from diseases due to
Trachoma is caused due to the presence of
In snowy regions, most of the fresh water is in the form of
Untreated sewage should not be pumped into
The water bodies smaller than oceans are known as
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