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  1. The diagram below shows the stages in the life cycle of a ladybird.

    State 2 differences between Stage X and Stage Y.
    Difference 1: ___________________________
    Difference 2: ___________________________.

    2. Your answer:

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  2. Look at the diagram below.

    All leaves of the Plant A were completely covered with black paper.
    The plant was left in the sun and given enough water.
    (a) Will the plant survive after one month?
    (b) Explain your answer in (a).

    3. Your answer:

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  3. You are in the garden when a beautiful bird starts chirping, what sense/s is/are you using?

    4. Your answer:

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  4. Carol shone a torchlight on a ball. A shadow was formed behind the ball.

    a) Carol said that shadow is not a matter. Is she correct?
    b) Explain your answer in (a).

    5. Your answer:

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  5. The places where bones meet are called joints. Look at the picture of the skeleton below.


    a) Identify a hinge-joint and draw an arrow to point to it. Label the joint 'P'.
    b) Identify a ball-and-socket joint and draw an arrow to point to it. Label the joint 'Q'.
    c) Xiaoqiang had his knees and elbows wrapped around with corrugated cardboard, as shown below. The he was asked to perform a few tasks like sitting on the floor and scratching his nose. He found great difficulty in performing those tasks. However, when the cardboards were removed, he found that he had no difficulty performing the same tasks.


    What does the experiment tell us about our joints.
    Ans:_______________

    6. Your answer:

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  6. Study the set-up below.

    a) Which beaker of fish will live longer?
    b) Give a reason for your answer in (a).

    7. Your answer:

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  7. Look at the classification table below.

    Group X

    Group Y

    Group Z

    wood

    clay

    silk

    cotton

    iron

    wool

    natural rubber

    glass

    (a) Complete the table by writing a material that can be put in Group Z.
    (b) What is the main difference between materials in Groups X and Y?

    8. Your answer:

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  8. Seawater evaporates to form water vapour. However the rain water that falls does not taste salty. Why?

    9. Your answer:

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  9. Study the diagram below.


    Jane measured 500 ml of water and poured it into Container A. She also measured another 500 ml of water and poured it into Container B.
    What are the two properties of water that Jane can conclude from this experiment?

    10. Your answer:

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  10. The pictures below show the different stages in the growth of a seed.
    (a) At which of the above stages would sunlight not be important?
    (b) Why would sunlight not be needed?
    (c) State the conditions needed for the seed to develop into stage B?

    11. Your answer:

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