9th Standard English Medium Science Subject Book Back 3 Mark Questions with Solution Part - I

9th Standard

    Reg.No. :
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Science

Time : 00:30:00 Hrs
Total Marks : 45
    15 x 3 = 45
  1. What is the measuring unit of the thickness of a plastic carry bag?

  2. A 900 kg car moving at 10 ms-1 takes a turn around a circle with a radius of 25 m. Determine the acceleration and the net force acting upon the car.

  3. State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give reason for your answer.

  4. Differentiate between filtrate and distillate

  5. What is isotone? Give an example

  6. How are the limbs of the birds adapted for avian life?

  7. Differentiate data and information.

  8. What could be the final temperature of a mixture of 100 g of water at 90ºC and 600g of water at 20ºC.

  9. The current flowing through a lamp is 0.2A. If the lamp is switched on for one hour, What is the total electric charge that passes through the lamp?

  10. A current carrying conductor of certain length, kept perpendicular to the magnetic field experiences a force F. What will be the force if the current is increased four times, length is halved and magnetic field is tripled?

  11. Write a note on different types on bonds?

  12. Define aquaregia

  13. In which stage of mitosis the chromosomes align in an equatorial plate? How?

  14. Explain the structure of nephron.

  15. Density of mercury is 13600 kg m–3. Calculate the relative density.

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