Safe and Drinking Water MCQ App Download - Grade 7 Science PDF e-Book
Class 7 Science Online Tests
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The MCQ: Oil can be poison for "Safe and Drinking Water" App Download [Free] with answers: insect's life, aquatic life, animal's life, and human life to learn online homeschool courses. Solve Importance of Water Quiz Questions, download Google e-Book (Free Sample) for taking online classes.
Oil can be poison for
When algae grows on the surface of water, it prevents
The poison gets more concentrated as it moves through
Skin diseases, eye infections and diarrhea are the examples of
Fish in the ponds and lakes die because the algae
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