8th Standard Science English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021 Part - 6

8th Standard

    Reg.No. :
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Science

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

    Part A

    20 x 1 = 20
  1. Closeness of two or more measured values is called as

    (a)

    accuracy

    (b)

    precision

    (c)

    error

    (d)

    approximation

  2. Normal temperature of the human body is between

    (a)

    98.4°Fand 99.6°F

    (b)

    98.40Fand 98.60F

    (c)

    97.4°Fand 98.6°F

    (d)

    97.6°Fand 99.60F

  3. Which of the following liquids has more viscosity?

    (a)

    Grease

    (b)

    Water

    (c)

    Coconut oil

    (d)

    Ghee

  4. Focal length is equal to half of the

    (a)

    centre of curvature

    (b)

    axis

    (c)

    radius of curvature

    (d)

    None of the above

  5. Mirrors which magnify the object placed close to them.

    (a)

    Convex mirror

    (b)

    Concave mirror

    (c)

    Plane mirror

    (d)

    ellipsoid mirror

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

    (a)

    ductility

    (b)

    malleability

    (c)

    conductivity

    (d)

    tensile strength

  7. Which of the following factor induces electrolysis?

    (a)

    Heat

    (b)

    light

    (c)

    electricity

    (d)

    catalysis

  8. Enzymes and yeasts are called

    (a)

    catalysts

    (b)

    bio catalysts

    (c)

    chemical catalysts

    (d)

    physical catalysts

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

    (a)

    Oscillatoria

    (b)

    Nostac

    (c)

    Volvox

    (d)

    Chlorella

  10. The erythrocyte is placed in _________ solution which has lesser concentration of solutes and greater concentration of water than in the cytoplasm.

    (a)

    Hypotonic

    (b)

    Hypertonic

    (c)

    Neutral

    (d)

    Acidic

  11. First generation computer has_________

    (a)

    Microprocessor

    (b)

    Integrated circuits

    (c)

    Artificial Intelligence

    (d)

    Vaccum tubes

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

    (a)

    Solid

    (b)

    Liquid

    (c)

    Gas

    (d)

    All the above

  13. Solvay process is a method to manufacture

    (a)

    lime water

    (b)

    aerated water

    (c)

    distilled water

    (d)

    sodium carbonate

  14. __________ joints are immovable.

    (a)

    Shoulder and arm

    (b)

    Knee and joint

    (c)

    Upper jaw and skull

    (d)

    Lower jaw and upper jaw

  15. ___________ are the chemical substances, secreted by endocrine glands.

    (a)

    Hormones

    (b)

    Enzymes

    (c)

    Proteins

    (d)

    Fatty acids

  16. Sound waves travel very fast in

    (a)

    air

    (b)

    metals

    (c)

    vacuum

    (d)

    liquids

  17. Mangalyaan was sent to ________

    (a)

    Moon

    (b)

    Mars

    (c)

    Venus

    (d)

    Mercury

  18. Sodium hydroxide is a ____________

    (a)

    acid

    (b)

    base

    (c)

    oxide

    (d)

    alkali

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

    (a)

    bio-pesticides

    (b)

    bio-fertilizers

    (c)

    earthworms

    (d)

    neem leaves

  20. Wildlife Protection Act was implemented in ________

    (a)

    1986

    (b)

    1972

    (c)

    1973

    (d)

    1971

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