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  1. After the eggs of the chicken are laid, the hen usually sits on them to provide _______________ for the eggs. The eggs will hatch after ____________ days.

    2. Your answer:

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  2. Janice puts a car on an aluminium sheet. She then placed a magnet under the aluminium sheet as show in the diagram below. When she moved the magnet, the car also moved.

    (a) Suggest 2 possible materials the car can be made of. (2 m)
    (b) What conclusion can you draw from the above experiment? (2 m)

    3. Your answer:

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  3. Three types of plants were placed into 3 identical containers filled with 200 ml of water. A layer of oil was poured into each container to prevent the water from evaporating into the air.

    The volume of water in each container was recorded on the 7th day in the table below.

    Container

    Vol. of water (ml)

    Vol. of water (ml)

    Day 1

    Day 7

    A

    200

    180

    B

    200

    175

    C

    200

    200

    (a) Which of the following containers (A, B or C) contained a plastic plant?
    (b) Explain why there was less water in containers A and B on Day 7.
    (c) From this experiment, we can tell that a living thing needs _______ to survive.

    4. Your answer:

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  4. 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).

    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 table below shows the breathing rates of different people when they are resting.

    People

    Breathing Rates (Average number of times per minute)
    Babies

    27-35
    Students

    21-23
    Adults

    18-20
    Senior citizens

    16-17

    a) How does the breathing rate vary according to age?
    Ans:_______________.
    b) Jayu, a 15 year old boy, checked his breathing rate 1 day while he was resting. What would his breathing rate be?
    Ans:_________________
    c) After playing soccer with his friends, he checked his breathing rate again. He found out that his breathing rate was 30 breaths per minute. Why was his breathing rate higher?
    Ans:________________

    7. Your answer:

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  7. Omar placed a stalk of celery into a beaker containing blue coloured water. 1 hour later, he cut the stem. Below is a cross-section of the stem.

    a) Shade in blue the parts that will turn blue.
    b) What is the function of A?
    c) What is the function of B?

    8. Your answer:

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  8. 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?


    9. Your answer:

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  9. The boiling point of water is a) _________________ ° C and freezing point of water is b)________________ ° C.

    10. Your answer:

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  10. Arrange the statements below to show the correct order of the water cycle. Write the numbers 1, 2, 3, 4 and 5 in the spaces provided. The first one has been done for you.
    (a) ___2___ Rain water flows into reservoirs, lakes and seas.
    (b) _____ Water vapour condenses to become clouds.
    (c) _____ Rain falls onto the earth.
    (d)______ Water droplets in the clouds get heavier and heavier.
    (e) _____ Water evaporates and water vapour rises high up in the sky.

    11. Your answer:

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