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  1. Study the flow chart as shown below.


    Match the animals given in the box below with the correct letters A, B and C.


    Animal A is __________
    Animal B is __________
    Animal C is __________

    2. Your answer:

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  2. Study the table below which compares the mass of a pair of scissors on Earth and on the Moon.
    (a) Use the following helping words to complete the table.

    Equal to 40
    		 more than 40
    		 less than 40


    		On Earth
    		 On Moon
    Mass of scissors (g)
    		 40
    		 (a1)___________
    Weight of scissors (units)
    		 40
    		 (a2)___________

    (b) Explain your answer in (a).

    3. Your answer:

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  3. (a) What is the function of the digestive system?
    (b) At which part of the digestive system is water absorbed from the undigested food?

    4. Your answer:

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  4. Four metal bars A, B, C and D are hung from a rod as shown below. The north pole of a bar magnet is brought near X, and then Y, of each metal bar.



    The table below shows the observations made during the experiment.



    Metal Bar

    A

    B

    C

    D

    Observations

    North Pole and X

    North Pole and Y

    repelled

    attracted

    nothing happened

    nothing happened

    attracted

    attracted

    attracted

    repelled

    (a) Which of the metal bars are magnets?

    ______________________________________


    (b) Explain your choice in (a).

    ______________________________________


    (c) Which one of the metal bars is not a magnet but made of iron?


    5. Your answer:

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  5. 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?

    6. Your answer:

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  6. The diagram below is a graphic organiser showing different ways of saving water. Complete the graphic organiser with the following examples.
    A May uses a basin to wash the vegetables.
    B A worker in a hotel collects laundry water to clean toilets.
    C Henry does not use running water to wash his car.
    D Singapore sets up plants to produce Newater.
    E Mother does not use the water hose to water her plants.
    F Sam does not leave the tap running all the time while bathing.
    G Grandmother collects water from the laundry to wash the toilets.
    H Lynn uses a tumbler instead of running water when brushing her teeth.

    Write down the letters (A,B,C,D,E,F,G or H) representing the examples in the appropriate oval.

    7. Your answer:

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  7. a) Ali hung an iron ball from the ceiling. Next, he placed a thin glass sheet in the diagram as shown below.


    i) State an observation of the iron ball when a strong magnet shown in the diagram above is moved continuously to and fro without touching the glass sheet.
    Ans:___________
    ii) Explain your answer to (a).
    Ans:___________
    b) Ali then replaced the thin glass sheet with an iron sheet. Then he moved the magnet to and fro without touching the iron sheet.
    i) State an observation of the iron ball.
    Ans:___________
    ii) Based on the experiments in (a) and (b), what conclusion could he draw?
    Ans:___________

    8. Your answer:

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  8. Suling has a jar of green beans in the living room. After several weeks, Suling wondered by the green beans did not germinate. Her friend, Mary, told her that she must make sure that her green beans has all the three necessary conditions. They are (i) ______________
    (ii) ______________
    (iii) ______________

    9. Your answer:

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  9. Harry did an experiment to compare inhaled and exhaled air. He noted down the differences in the table as shown below.

    Inhaled air

    Exhaled air
    More oxygen Less oxygen
    Less warm Warmer
    Less carbon dioxide More carbon dioxide
    Less water vapour More water vapour

    Using the information given, indicate whether the statements below are 'True', 'False' or 'Not possible to tell' by ticking the appropriate boxes.

    Statements

    True

    False

    Not possible to tell
    a) The air we breathe out has no oxygen


    b) Exhaled air is heavier than inhaled air


    c) Inhaled air is not as damp as exhaled air


    d) The amount of air that is breathed in is the same as the amount of air breathed out



    10. Your answer:

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  10. a) Based on the picture below, list two possible cases of pollution.

    I. ____________________________________
    II. ____________________________________
    b) How does the pollution shown affects aquatic life? Ans: _____________________________

    11. Your answer:

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