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Everyday Science MCQs

Page 66 of Everyday Science multiple-choice questions with answers. Tap an option to check yourself.

Page 66 of 198

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Question 1316 Everyday Science

Why is ordinary rain slightly acidic?

Correct answer C. Carbon dioxide and water in clouds react to form carbonic acid

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Question 1320 Biology

When is the “lub” heart sound produced?

Correct answer C. The bicuspid and tricuspid valves suddenly close

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