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Everyday Science Quiz MCQ Practice

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1. The gas used to fill balloons that makes them float in air is:

  1. A. Nitrogen
  2. B. Helium
  3. C. Carbon dioxide
  4. D. Oxygen
Answer: Helium
Explanation: Helium — verified fact for Everyday Science Quiz.
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2. The main constituent gas of the Earth's atmosphere by volume is:

  1. A. Nitrogen (about 78%)
  2. B. Carbon dioxide
  3. C. Argon
  4. D. Oxygen
Answer: Nitrogen (about 78%)
Explanation: Nitrogen (about 78%) — verified fact for Everyday Science Quiz.
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3. The vitamin produced by the human body when exposed to sunlight is:

  1. A. Vitamin B12
  2. B. Vitamin C
  3. C. Vitamin A
  4. D. Vitamin D
Answer: Vitamin D
Explanation: Vitamin D — verified fact for Everyday Science Quiz.
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