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  1. The "pulling" distance of a magnet is the furthest distance from which it is able to attract a magnetic object. Elaine carried out an investigation to find out the "pulling" distance of 3 different types of magnets.

    She recorded the "pulling" distance of the different magnets in the table below.

    Results:

    Magnet

    "Pulling" Distance (cm)

    Bar Magnet

    2.9

    Ring Magnet

    0.8

    U-shaped magnet

    1.7


    (a) List the magnets according to their strengths, from the weakest to the strongest. [1]

    ____________________________________________________________

    (Weakest) (Strongest)

    (b) State the relationship between the strength of the magnetic force and the pulling distance of the magnets. [1]

    ______________________________


  2. Your answer:


  3. List two ways the government obtains water for Singapore.
    a) ___________________________________________
    b) ____________________________________________

  4. Your answer:


  5. Complete the table by classifying the following parts into the correct systems.
    Blood vessels Gullet Heart
    Nose Small intestine Lungs
    Mouth Stomach Windpipe

    Digestive System

    Circulatory System

    Respiratory System














  6. Your answer:


  7. 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:________________

  8. Your answer:


  9. Match each object to its property.


  10. Your answer:


  11. Peter put a sponge into a metal container as shown below. He then put weights on the plunger and measured the volume of the sponge when the plunger stopped moving upwards. He repeated the experiment with different weights.


    Peter recorded his results and drew a graph as shown below.
    a) Label in the boxes below the horizontal axis and the vertical axis.


    b) Name 1 property of the sponge based on the graph below.
    Ans:

  12. Your answer:


  13. Samantha spilled some coffee on her living room floor. Two hours later there were some stains left on the floor. How were the stains formed?

  14. Your answer:


  15. Raj would like to know how his pulse rate will change with the activities he is engaged in. The graph below shows Raj's pulse rate taken when he was involved in 3 different activities.


    a) Which line, A, B, or C, shows Raj's pulse rate when he was jogging at East Coast Park?
    Ans:__________
    b) Raj realised that he was panting after he jogged. Why was that so?
    Ans:
    c) What could Raj be doing when his pulse rate is at Line C?
    Ans:___________

  16. Your answer:


  17. Some animals are put into 2 groups, A and B, as shown below.

    Animals
    Group A Group B

    guppy

    hen

    elephant

    platypus

    rabbit

    angelfish

    cat

    Q


    (a) Explain how these animals are grouped.

    (b) What animal could Q be?

    (c) State the difference between the hen and platypus in Group B. Do not compare size.


  18. Your answer:




  19. Name the sources of the water that formed the water droplets.
    Picture A _________
    Picture B __________

  20. Your answer:



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