8th Standard Science English Medium Free Online Test Book Back 1 Mark Questions Part - Three

8th Standard

    Reg.No. :
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Science

Time : 00:10:00 Hrs
Total Marks : 10

    Part A

    10 x 1 = 10
  1. Pascal’s law is used in

    (a)

    hydraulic lift

    (b)

    brake system

    (c)

    pressing heavy bundles

    (d)

    All the above

  2. The refractive index of water is

    (a)

    1.0

    (b)

    1.33

    (c)

    1.44

    (d)

    1.52

  3. ______ metal undergoes rusting.

    (a)

    tin

    (b)

    sodium

    (c)

    copper

    (d)

    iron

  4. _________ is an example for colonial form of algae.

    (a)

    Oscillatoria

    (b)

    Nostac

    (c)

    Volvox

    (d)

    Chlorella

  5. Osmosis is the movement of water molecules from a ___________.

    (a)

    Higher concentration to a region of lower concentration.

    (b)

    Lower concentration to a region of higher concentration.

    (c)

    Both of these

    (d)

    None of these

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

    (a)

    sublimation

    (b)

    condensation

    (c)

    freezing

    (d)

    deposition

  7. In water, hydrogen and oxygen are combined in the ratio of _______by mass.

    (a)

    1:8

    (b)

    8:1

    (c)

    2:3

    (d)

    1:3

  8. Adam’s apple is the growth of the ________

    (a)

    pharynx

    (b)

    thyroid

    (c)

    larynx

    (d)

    parathyroid

  9. Sound waves travel very fast in

    (a)

    air

    (b)

    metals

    (c)

    vacuum

    (d)

    liquids

  10. A compass is used for __________

    (a)

    plotting magnetic lines

    (b)

    detection of magnetic field

    (c)

    navigation

    (d)

    All of these

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