Term 2 Heat One Mark Questions with Answer

8th Standard EM

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Science

Time : 00:30:00 Hrs
Total Marks : 23
    6 x 1 = 6
  1. Heat is a form of ________.

    (a)

    electrical energy

    (b)

    gravitational energy

    (c)

    thermal energy

    (d)

    None of these

  2. If you apply some heat energy to a substance, which of the following can take place in it?

    (a)

    Expansion

    (b)

    Increase in temperature

    (c)

    Change of state

    (d)

    All the above

  3. Which of the following substances will absorb more heat energy?

    (a)

    Solid

    (b)

    Liquid

    (c)

    Gas

    (d)

    All the above

  4. If you apply equal amount of heat to a solid, liquid and gas individually, which of the following will have more expansion?

    (a)

    Solid

    (b)

    Liquid

    (c)

    Gas

    (d)

    All of them

  5. The process of converting a liquid into a solid is called_________.

    (a)

    sublimation

    (b)

    condensation

    (c)

    freezing

    (d)

    deposition

  6. Conduction is the heat transfer which takes place in a____________.

    (a)

    solid

    (b)

    liquid

    (c)

    gas

    (d)

    All of them

  7. 6 x 1 = 6
  8. A calorimeter is a device used to measure the________.

    ()

      

  9. _______ is defined as the amount of heat required to raise the temperature of 1kg of a substance by 1°C.

    ()

       

  10. A thermostat is a device which maintains _________.

    ()

        

  11. The process of converting a substance from gas to solid is called_________.

    ()

      

  12. If you apply heat energy, the temperature of a system will ________.

    ()

       

  13. If the temperature of a liquid in a container is decreased, then the interatomic distance will ___________.

    ()

      

  14. 6 x 1 = 6
  15. The applied heat energy can be realized as an increase in the average kinetic energy of the molecules.

    (a) True
    (b) False
  16. The dimensions of a substance are increased if the temperature of the substance is decreased.

    (a) True
    (b) False
  17. The process of converting a substance from solid to gas is called condensation.

    (a) True
    (b) False
  18. Convection is the process by which the thermal energy flows in solids.

    (a) True
    (b) False
  19. The amount of heat gained by a substance is equal to the product of its mass and latent heat.

    (a) True
    (b) False
  20. In a thermos flask, the silvered walls reflect and radiate the heat to the outside.

    (a) True
    (b) False
  21. 5 x 1 = 5
  22. Conduction

  23. (1)

    Liquid

  24. Convection

  25. (2)

    Gas to liquid

  26. Radiation

  27. (3)

    Gas

  28. Sublimation

  29. (4)

    Solid to gas

  30. Condensation

  31. (5)

    Solid

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