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Section B

[20 marks]

The time suggested for this section is 30 minutes. If you are unable to answer any question, proceed to the next question.

 Answer all questions.

Write your answers in the spaces provided.

1 Figure I shows the result of an investigation carried out by Ali on object X and Y

when placed in the salt solution.

In the investigation state;

a what to change?

 _____________________________________________________ [ 1 mark ]

b what to measure(observe)?

 _____________________________________________________ 

[ 1 mark ]

c what to keep the same?

 _____________________________________________________ 

[ 1 mark ]

018 TOV/SCIENCE YEAR 4 /2006  [ Lihat sebelah

  SULIT 

Object

Y(10 g)

Object

X(20 g)

800 ml

Salt

solution

Figure 1

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2 Objects M and N are the same size, shape and material. M and N were blown with

equal strength as shown in figure 2 below. M felt first.

Based on the investigation, state the following;

a what to change?

 _____________________________________________________ 

[ 1 mark ]

b what to measure(observe)?

 _____________________________________________________ [ 1 mark ]

c what to keep the same?

 _____________________________________________________ 

[ 1 mark ]

018 TOV/SCIENCE YEAR 4 /2006  [ Lihat sebelah

  SULIT 

M N

Wind

from fan

Figure 2

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4 Figure 4 show three types of metal rods. Each has thumb tacks with wet candle

attached it at one end. When the rods are heated a shown below, the thumb tacks

dropped.

The table below recorded the time taken for each of the thumb tacks to drop.

Rod Time taken for the thumb tack to drop

X 6 minutes

Y 4 minutes

Z 2 minutes

a Which rod is the best conductor of heat ?

  ______________________________________________________ 

[ 1 mark ]

 b Which rod is the poorest conductor of heat ?

 ______________________________________________________ [ 1 mark ]

018 TOV/SCIENCE YEAR 4 /2006  [ Lihat sebelah

  SULIT 

Thumb

tack with wet

candleRod Z

Rod Y

Rod X

Gas burner 

Figure 4

Thread

Retortstand

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5 Aminah carried out a fair test to study the ability of four different materials of the

same size to absorb water. She put the materials into a Petri disk filled with red-

coloured water. The picture shows the results of her fair test.

Based on the above observations state;

a What to change?

 _______________________________________________________ 

[ 1mark ] b What to keep the same?

 _______________________________________________________ [ 1 mark ]

c Name the material C

 _______________________________________________________ [ 1 mark ]

d Which the best material to make a kitchen towel?

 _______________________________________________________ 

[ 1 mark ]

e Which material is the best to make raincoat?

 _______________________________________________________ 

[ 1 mark ]f Give your reason for answer in e)

 _______________________________________________________ 

[ 1 mark ]

END OF SECTION B

018 TOV/SCIENCE YEAR 4 /2006  [ Lihat sebelah

  SULIT 

Red

RedWhite

Red

B 

C

 

D

 A 

Red coloured water 

Figure 5

SULIT