Class 7 Science MCQs – Certification Test 5

Water Treatment Trivia (Question 5) – Learning App & e-Book Download

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MCQ 5: Fluoride is also added to water, which helps in preventing:

infection
sickness
fever
tooth decay

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Water Treatment Trivia App & e-Book – Class 7 Science Exam Prep

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Free Water Treatment Learning App – Download from Play & App Store

The App: Water Treatment Trivia App to Learn Water Treatment Notes, 7th Grade Science Trivia App, and 8th Grade Science Trivia App to strengthen science understanding online.

The "7th Grade Science Learning" App: Free Water Treatment Learning App Download (Android & iOS) to study lab safety rules. Download App Store & Play Store Study Apps with all functionalities for middle school online science.