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🔬 Everyday Science MCQs
Practise Everyday Science questions on physics, chemistry and biology for one-paper exams, with answers and explanations.
Everyday Science tests basic facts about the world around us: the human body, common chemicals, simple physics and health. These are scoring questions if you learn the basics well.
Topics covered
PhysicsChemistryBiologyHuman BodyVitamins and HealthUnits and Instruments
Practice MCQs
1. What is the chemical formula of water?
- CO2
- O2
- NaCl
- H2O
Answer: D. H2O
Water is made of two hydrogen atoms and one oxygen atom.
Water is made of two hydrogen atoms and one oxygen atom.
2. Which gas do plants take in for photosynthesis?
- Oxygen
- Nitrogen
- Carbon dioxide
- Hydrogen
Answer: C. Carbon dioxide
Plants take in carbon dioxide and release oxygen.
Plants take in carbon dioxide and release oxygen.
3. Which vitamin does the skin make with the help of sunlight?
- Vitamin A
- Vitamin C
- Vitamin K
- Vitamin D
Answer: D. Vitamin D
Sunlight helps the skin make vitamin D.
Sunlight helps the skin make vitamin D.
4. Which is the hardest natural substance?
- Gold
- Diamond
- Iron
- Quartz
Answer: B. Diamond
Diamond is the hardest natural substance.
Diamond is the hardest natural substance.
5. What is the normal human body temperature?
- About 37 °C
- About 30 °C
- About 42 °C
- About 25 °C
Answer: A. About 37 °C
Normal body temperature is about 37 °C (98.6 °F).
Normal body temperature is about 37 °C (98.6 °F).
6. Which organ pumps blood around the body?
- Liver
- Lungs
- Heart
- Kidney
Answer: C. Heart
The heart pumps blood through the blood vessels.
The heart pumps blood through the blood vessels.
7. What is the SI unit of force?
- Joule
- Pascal
- Watt
- Newton
Answer: D. Newton
Force is measured in newtons.
Force is measured in newtons.
8. What is the approximate speed of light in a vacuum?
- 3 × 10^8 m/s
- 3 × 10^6 m/s
- 3 × 10^5 m/s
- 3 × 10^10 m/s
Answer: A. 3 × 10^8 m/s
Light travels at about 300,000 km per second.
Light travels at about 300,000 km per second.
9. Which blood cells help fight infection?
- Red blood cells
- White blood cells
- Platelets
- Plasma
Answer: B. White blood cells
White blood cells are part of the immune system.
White blood cells are part of the immune system.
10. What is the pH of pure water?
- 0
- 5
- 7
- 14
Answer: C. 7
Pure water is neutral, with a pH of 7.
Pure water is neutral, with a pH of 7.
11. Which gas makes up most of the air?
- Oxygen
- Nitrogen
- Argon
- Carbon dioxide
Answer: B. Nitrogen
Air is about 78 percent nitrogen.
Air is about 78 percent nitrogen.
12. The disease scurvy is caused by a lack of which vitamin?
- Vitamin A
- Vitamin B12
- Vitamin D
- Vitamin C
Answer: D. Vitamin C
Scurvy comes from a lack of vitamin C.
Scurvy comes from a lack of vitamin C.
13. Which instrument measures atmospheric pressure?
- Thermometer
- Barometer
- Hygrometer
- Anemometer
Answer: B. Barometer
A barometer measures air pressure.
A barometer measures air pressure.
14. What is the chemical symbol of gold?
- Ag
- Gd
- Au
- Go
Answer: C. Au
Au comes from the Latin word aurum.
Au comes from the Latin word aurum.
15. Which part of a cell contains most of the DNA?
- Nucleus
- Cell wall
- Ribosome
- Vacuole
Answer: A. Nucleus
The nucleus holds most of the cell’s DNA.
The nucleus holds most of the cell’s DNA.