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" 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.