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(No Score) 1 Min 13 Sec

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  1. (a) The pie chart below shows the composition of different gases in the air. Identify Gas A and B.


    (b) Name one function of Gas B.

    2. Your answer:

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  2. A fresh piece of bread was left in a plastic bag. After some days, patches of thread-like things started to grow on the bread. Later, tiny black dots formed.
    (a) What are the thread-like things that grew on the bread?
    (b) What are the tiny black dots?
    (c) If the fresh piece of bread had been toasted instead, would you find the thread-like things on it? Why?

    3. Your answer:

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  3. The diagram shows an umbrella.

    (a) What is the one most important property that a material must have to make it suitable for making part Y of the above umbrella?
    (b) If paper was used to make part Y, what must be added to the paper to make it a suitable material?
    (c) Aluminium is often used to make part Z. Why is aluminium a better choice than iron?

    4. Your answer:

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  4. Yasmin shone a torchlight at 3 different materials (A, B and C) shown below.

    a) Which material (A, B or C) cast the darkest shadow?
    Why does the material you chose in (a) cast the darkest shadow?
    c) Why is material A used to make the windscreen of a car?

    5. Your answer:

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  5. Material Y has the following properties:

    • Soft and light
    • Can be dyed
    • Not waterproof
    • Can be sewn

      • a) What could Material Y be?
      b) Why is Material Y not suitable for making into an unmbrella?
      c) List one use of Material Y.
      Your answer:

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    • Fill in the missing stage in the life cycle of a chicken.


      • Your answer:

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    • (a) John decided to hang his clothes out to dry one night, right after it stopped raining. However, the clothes were still damp the next morning. Give two possible reasons why this was so.
      (b) What other factor affected the rate of evaporation?

      • Your answer:

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    • Complete the graphic organizer below by filling in the blanks (A) to (D).

      • Your answer:

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    • The equation below shows the respiration process during which energy is released for our body to use. Fill in the boxes with suitable word(s).
      a) ________________ + Sugar → Carbon dioxide + b) _______________

      • Your answer:

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    • A small iron pin was suspended from a table. A piece of paper was placed close to the iron pin. A bar magnet was later brought near the paper.

      (a) Draw on the diagram below to show what will happen when the magnet is brought close to the iron pin that has been suspended on a string.

      (b) What would the observation be if the piece of paper is changed to a piece of cloth?
      (c) What does this experiment show?

      • Your answer:

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