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Science School Questions

Class 10 Science Questions And Answers

  1. What is the chemical formula for water?
    Answer: H2O.
  2. What is the unit of measurement for electric current?
    Answer: Ampere (A).
  3. What is the function of the nucleus in a cell?
    Answer: DNA.
  4. Name the process by which plants make their own food.
    Answer: photosynthesis.
  5. Which gas is released during photosynthesis?
    Answer: Oxygen gas (O2)
  6. What is the SI unit of force?
    Answer: Newton (N).
  7. What is the role of chlorophyll in plants?
    Answer: absorbs light energy for photosynthesis
  8. What is the largest organ in the human body?
    Answer: the skin.
  9. What is the process of conversion of solid directly into gas called?
    Answer: sublimation.
  10. Name the instrument used to measure blood pressure.
    Answer: sphygmomanometer.
  11. What is the formula to calculate speed?
    Answer: speed = distance/time.
  12. What is the main constituent of biogas?
    Answer: methane (CH4).
  13. What is the formula to calculate density?
    Answer: Density = mass/volume.
  14. What is the process of conversion of water vapor into water droplets called?
    Answer: Condensation.
  15. What is the pH scale used to measure?
    Answer: To measure the acidity or alkalinity of a substance.
  16. What is the process of separation of insoluble solid particles from a liquid called?
    Answer: Filtration.
  17. What is the formula to calculate work?
    Answer: Work = force × distance.
  18. What is the role of hemoglobin in our body? Answer: Hemoglobin is a protein in red blood cells that carries oxygen from the lungs to body tissues.
  19. What is the chemical name of baking soda?
    Answer: Sodium bicarbonate (NaHCO3).
  20. What is the function of the cerebellum in the brain?
    Answer: Coordination and balance in the human body.
  21. What is the unit of measurement for frequency?
    Answer: Hertz (Hz).
  22. What is the process of conversion of light energy into electrical energy called?
    Answer: The photovoltaic effect.
  23. What is the process of conversion of milk into curd called?
    Answer: Fermentation.
  24. What is the formula to calculate pressure?
    Answer: Pressure = force/area.
  25. What is the role of the ozone layer in the atmosphere?
    Answer: Absorbs ultraviolet radiation of Sun

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