starpoint.com.sg NSP-111-160210-181446

Note: You may review this test later in the question review session.

(No Score) 5 Min 0 Sec

* Please note that the answer we provided is only for your information. Good luck!

  1. 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



    2. Your answer:

    Click here for proposed answer: open passage

  2. Mary hung 2 bar magnets as shown below.


    (a) When Magnet A was brought close to Magnet B, both magnets turned in the direction shown by the arrows. Explain why this happened.


    (b) If a thin piece of wood was placed between the bars, would the result still be the same? Why?

    3. Your answer:

    Click here for proposed answer: open passage

  3. Joseph wanted to find out how well light can pass through different kinds of materials. Put a tick against each material to show how well he can see through them.

    Materials

    Cleary

    Partially

    Not at all

    a)

    Rubber boots


    b)

    Frosted glass


    c)

    Dark sunglass lenses


    d)

    Tracing paper



    4. Your answer:

    Click here for proposed answer: open passage

  4. Mary set up an experiment in a non- airconditioned room as shown in the diagram below. The temperature of the water in the test-tube was 27°C .


    (a) What could she observe in the beaker of crushed ice after some time?
    (b) Mary was told that she could use the setup above to freeze the water in the test-tube. Suggest how she could do that whilst still keeping the setup on the table in the same room.
    (c) Explain why the water in the test-tube could freeze in (b).

    5. Your answer:

    Click here for proposed answer: open passage

  5. The diagram shows the exchange of gases between living things and their environment.

    (a) Which 2 arrows indicate the exchange of gases during photosynthesis?

    ___________________________________

    (b) Besides photosynthesis, name the other process that is represented by the arrows in the diagram.

    _________________________________


    6. Your answer:

    Click here for proposed answer: open passage

  6. Daud inverts a plastic cup and pushes it into a water trough. He notices that the water does not enter the cup.

    a) What can Daud conclude from the experiment?
    b) He then proceeds to pierce a hole at the bottom of the cup. Draw the water level in the cup and the water level in the water trough in the diagram below.

    c) Explain the reason for the water level in b).

    7. Your answer:

    Click here for proposed answer: open passage

  7. Rahimah set up an experiment as shown in the diagram below.


    She placed an aluminium foil over the beaker of hot water.
    There were a few ice cubes on top of the aluminium foil.
    After a while, she noticed that some water droplets were formed.
    (a) At which part of the diagram (1, 2, 3 or 4) were the water droplets formed?
    (b) Explain why water droplets were formed.
    (c) If the ice cubes were removed, would there be more or less water droplets formed?
    (d) Explain your answer in (c).

    8. Your answer:

    Click here for proposed answer: open passage

  8. A burning candle was each placed in three jars of different sizes, A, B and C. The time taken for each candle to go off was different.


    (a) Which candle will go off first?
    (b) What is the relationship between the size of the jar and the time taken for the candle to go off?

    9. Your answer:

    Click here for proposed answer: open passage

  9. Study the diagram below which shows a syringe filled with air.
    The plunger was pressed down while the nozzle was sealed.


    (a) What happened to the volume of air when the plunger was pressed down?
    (b) Explain your answer to (a).

    10. Your answer:

    Click here for proposed answer: open passage

  10. The table below shows the characteristics of four things A, B, C and D.

    Responds to changes

    Needs air, food and water

    Can fly

    A

    Yes



    B

    Yes

    Yes


    C



    Yes

    D

    Yes

    Yes

    Yes


    Using the information, identify the things below by writing the correct letter in the boxes.


    11. Your answer:

    Click here for proposed answer: open passage

Click Turn Right Ahead sign for next test