Changes Around Us Model Question Paper

6th Standard

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Science

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 1 = 5
  1. When ice melts to form water, change occurs in its

    (a)

    position

    (b)

    colour

    (c)

    state

    (d)

    composition

  2. Drying of wet clothes in air is an example of

    (a)

    Chemical change

    (b)

    Undesirable change

    (c)

    irreversible change

    (d)

    physical change

  3. Formation of curd from milk is

    (a)

    a reversible change

    (b)

    a fast change

    (c)

    an irreversible change

    (d)

    an undesirable change

  4. Out of the following an example of a desirable change is

    (a)

    rusting

    (b)

    change of seasons

    (c)

    earthquake

    (d)

    flooding

  5. Air pollution leading to Acid rain is a

    (a)

    reversible change

    (b)

    fast change

    (c)

    natural change

    (d)

    human made change

  6. 5 x 1 = 5
  7. Magnet attracts iron needle. This is ________________change. (a reversible / an irreversible)

    ()

    an irreversible

  8. Boiling of egg results in__________________change. (a reversible / an irreversible)

    ()

    a reversible

  9. Changes that are harmful to us are_______________(desirable / undesirable)

    ()

    undesirable

  10. Plants convert Carbon-di-oxide and water into starch. This is an example of _____________change. (natural / human made)

    ()

    natural

  11. Bursting of fire crackers is a ___________________change whereas germination of seeds is a _________________change. (slow / fast)

    ()

    slow

  12. 5 x 1 = 5
  13. Growing of teeth in an infant is slow change.

    (a) True
    (b) False
  14. Burning of match stick is a reversible change.

    (a) True
    (b) False
  15. Change of New moon to Full moon is human made.

    (a) True
    (b) False
  16. Digestion of food is a physical change.

    (a) True
    (b) False
  17. In a solution of salt in water, water is the solute.

    (a) True
    (b) False
  18. 4 x 2 = 8
  19. Growth of a child, Blinking of eye, Rusting, Germination of a seed

  20. Glowing of a bulb, lighting of a Candle, breaking of a coffee mug, curdling of milk

  21. Rotting of an egg, condensation of water vapour, trimming of hair, Ripening of fruit

  22. Inflating a balloon, popping a balloon, fading of wall paint, burning of kerosene

  23. 4 x 2 = 8
  24. What kind of a change is associated with decaying of a plants?

  25. You are given some candle wax. Can you make a candle doll from it? What kind of change is this?

  26. Define a slow change.

  27. What is a solution?

  28. 3 x 3 = 9
  29. What happen when paper is burnt? Explain.

  30. Can deforestation be considered a desirable change? Explain.

  31. What type of changes is associated with germination of a seed? Explain

  32. 2 x 5 = 10
  33. Give one example in each case that happens around you.
    a. Slow and fast change
    b. Reversible and irreversible change
    c. Physical and chemical change
    d. Natural and man-made change
    e. Desirable and undesirable change

  34. When a candle is lit the following changes are observed.
    a. Wax melts.
    b. Candle keeps burning.
    c. The size of the candle decreases.
    d. The molten wax solidifies
    e. Which of the changes can be reversed? Justify your answer.

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