8th Standard Science English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021 Part - 5

8th Standard

    Reg.No. :
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Science

Time : 00:20:00 Hrs
Total Marks : 20

    Part A

    20 x 1 = 20
  1. SI unit of temperature is

    (a)

    celsius

    (b)

    fahrenheit

    (c)

    kelvin

    (d)

    ampere

  2. If the area of contact is greater, then the ______ will be greater.

    (a)

    Pressure

    (b)

    Temperature

    (c)

    Friction

    (d)

    Force

  3. The centre of a sphere of which the reflecting surface of a spherical mirror is a part is called

    (a)

    pole

    (b)

    centre of curvature

    (c)

    cradius of curvature

    (d)

    aperture

  4. The property which allows metals to be hammered into their sheets is ___________

    (a)

    ductility

    (b)

    malleability

    (c)

    conductivity

    (d)

    tensile strength

  5. Which of the following element is named after a scientist?

    (a)

    Americium

    (b)

    Mercury

    (c)

    Nobelium

    (d)

    Neptunium_

  6. In Haber’s process of producing ammonia ______ is used as a catalyst.

    (a)

    Nitrogen

    (b)

    hydrogen

    (c)

    iron

    (d)

    nickel

  7. The brown colour of a cut apple is due to

    (a)

    rusting

    (b)

    rancidity

    (c)

    browning

    (d)

    fermentation

  8. The first vascular cryptogams in land plants are ________.

    (a)

    Bryophytes

    (b)

    Pteridophytes

    (c)

    Gymnosperm

    (d)

    Angiosperm

  9. 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

  10. _________are called as building blocks of life

    (a)

    Cells

    (b)

    nucleus

    (c)

    Cell organelles

    (d)

    tissues

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

    (a)

    solid

    (b)

    liquid

    (c)

    gas

    (d)

    All of them

  12. Which of the following is true about oxygen?

    (a)

    Completely burning gas

    (b)

    Partially burning gas

    (c)

    Doesn’t support burning

    (d)

    Supports burning

  13. Which one of the following organisms lack muscles and skeleton for movement?

    (a)

    Dog

    (b)

    Snail

    (c)

    Earthworm

    (d)

    Human being

  14. During menstruation, the progesterone level is ___________

    (a)

    decreased

    (b)

    increased

    (c)

    ceased

    (d)

    normal

  15. The range of audible frequency for the human ear is

    (a)

    2 Hz to 2000 Hz

    (b)

    20 Hz to 2000 Hz

    (c)

    20 Hz to 20000 Hz

    (d)

    200 Hz to 20000 Hz

  16. A compass is used for __________

    (a)

    plotting magnetic lines

    (b)

    detection of magnetic field

    (c)

    navigation

    (d)

    All of these

  17. The gas collected at the cathode on electrolysis of water is

    (a)

    oxygen

    (b)

    hydrogen

    (c)

    nitrogen

    (d)

    carbon dioxide

  18. Magnesium hydroxides are used for treating_______

    (a)

    acidity

    (b)

    head pain

    (c)

    teeth decay

    (d)

    None of these

  19. Organism that control insects and pests of plant crops is

    (a)

    bio-pesticides

    (b)

    bio-fertilizers

    (c)

    earthworms

    (d)

    neem leaves

  20. If the ruler is not displayed in the screen, __________ option is clicked.

    (a)

    View -> ruler

    (b)

    View -> task

    (c)

    File -> save

    (d)

    Edit -> paste

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