Std 8 Science Chapter-3

16 Questions | Total Attempts: 279

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Std 8 Science Chapter-3

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Questions and Answers
  • 1. 
    The SI unit of force is---------
    • A. 

      Dyne

    • B. 

      Newton

    • C. 

      Joule

    • D. 

      Option 4

  • 2. 
    The air pressure on our body is equal to ---------pressure
    • A. 

      Atmospheric

    • B. 

      Sea bottom

    • C. 

      Face

    • D. 

      Option 4

  • 3. 
    For a given object the buoyant force is liquid of difference---------- is different
    • A. 

      The same

    • B. 

      Density

    • C. 

      Area

    • D. 

      Option 4

  • 4. 
    The SI unit of pressure is-------------
    • A. 

      N/m3

    • B. 

      N/m2

    • C. 

      Kg/m2

    • D. 

      Option 4

  • 5. 
    -------------Surrounds the Earth from all side
    • A. 

      Air

    • B. 

      Water

    • C. 

      Land

    • D. 

      Option 4

  • 6. 
    Object are attracted to the Earth due to the force of gravity
    • A. 

      True

    • B. 

      False

  • 7. 
    The tendency of an object to remain in its existing state is called its inertia
    • A. 

      True

    • B. 

      False

  • 8. 
    Force does not give motions to a stationary object
    • A. 

      True

    • B. 

      False

  • 9. 
    Rubber band when stretched expand
    • A. 

      True

    • B. 

      False

  • 10. 
    The force exerted perpendicularly on a unit area is called inertia
    • A. 

      True

    • B. 

      False

  • 11. 
    Air surrounds the Earth from all side this layer of air is called
    • A. 

      Atmosphere

    • B. 

      Hydrosphere

    • C. 

      Lithosphere

    • D. 

      Option 4

  • 12. 
    The density of sea water is------ then the density of freshwater
    • A. 

      Lower

    • B. 

      Higher

    • C. 

      Non above this

    • D. 

      Option 4

  • 13. 
    When a--------- is applied on a stationary object  it move
    • A. 

      Force

    • B. 

      Inertia

    • C. 

      Pressure

    • D. 

      Option 4

  • 14. 
    The pressure created by this air column on Earth is known as
    • A. 

      Unit of pressure

    • B. 

      Atmospheric pressure

    • C. 

      Gas pressure

    • D. 

      Option 4

  • 15. 
    The atmospheric exist to about -------km height
    • A. 

      16 km

    • B. 

      20 km

    • C. 

      18 km

    • D. 

      Option 4

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