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Science Quiz: 10 General Science Questions with Answers

Written by the Quizzeela team
Last checked · 10 questions · Easy

Science is everywhere around us. Test your basics with 10 quick questions.

Play as a timed quiz and earn coins

1What is the chemical formula of water?

  1. H2O
  2. O2
  3. NaCl
  4. CO2
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Answer: A. H2O. Water has two hydrogen atoms and one oxygen atom: H2O.

2What is the SI unit of force?

  1. Pascal
  2. Newton
  3. Watt
  4. Joule
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Answer: B. Newton. Force is measured in newtons (N), named after Isaac Newton.

3How many bones does an adult human body usually have?

  1. 106
  2. 406
  3. 206
  4. 306
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Answer: C. 206. An adult usually has 206 bones. Babies are born with more, which fuse over time.

4What is the largest organ of the human body?

  1. Liver
  2. Heart
  3. Brain
  4. Skin
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Answer: D. Skin. The skin is the largest organ by area and weight.

5Which part of the cell is called its "powerhouse"?

  1. Ribosome
  2. Cell wall
  3. Nucleus
  4. Mitochondria
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Answer: D. Mitochondria. Mitochondria release energy from food for the cell to use.

6Which vitamin does the skin make with sunlight?

  1. Vitamin B12
  2. Vitamin C
  3. Vitamin A
  4. Vitamin D
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Answer: D. Vitamin D. Skin makes vitamin D when exposed to sunlight.

7At sea level, water boils at:

  1. 120 °C
  2. 100 °C
  3. 90 °C
  4. 50 °C
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Answer: B. 100 °C. Water boils at 100 °C at normal sea-level pressure. It boils at a lower temperature on mountains.

8Sound cannot travel through:

  1. A vacuum
  2. Air
  3. Water
  4. Steel
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Answer: A. A vacuum. Sound needs a medium like air, water or solids. In a vacuum there is nothing to carry it.

9Light travels at about:

  1. 3 km per second
  2. 3,000 km per second
  3. 30,000 km per second
  4. 3,00,000 km per second
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Answer: D. 3,00,000 km per second. Light travels at about 3 lakh (300,000) km per second in a vacuum.

10Which gas makes up most of Earth's air?

  1. Carbon dioxide
  2. Hydrogen
  3. Oxygen
  4. Nitrogen
Show answer
Answer: D. Nitrogen. About 78% of the air is nitrogen. Oxygen is about 21%.
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Sources: NCERT science textbooks and standard references. Found a mistake? Use "Report a mistake" in the timed quiz.