8/14/2019 Modul Cemerlang Set 4 (B)

1/5

Hulu Langat District Science Panel 2007

SECTION B

1 A group of pupils carried out an investigation to find out if microorganisms can grow.They sprinkled a piece of bread with a few drops of water. The bread was left in a plastic

bag for a week. The bar chart shows the results obtained.

Figure 1

(a) What is the aim of this investigation?

To investigate whether microorganisms can grow.

(1mark)

(b) State the following variables in the experiment.(i) What need to be change: Time

(ii) What need to be measured: Number of black patches(2marks)

(c ) Predict what happen to the bread on the fifth days.

(1mark)

(d) Write your observation on the fifth days?

(1mark)

(e) What can be conclude through this investigation?

________________________________________________________________________

The number of days increase, the number of _____________also increase.

(1mark )

5

105

155

205

255

1 3 7Days

Number of black spots

0

Marks

8/14/2019 Modul Cemerlang Set 4 (B)

2/5

8/14/2019 Modul Cemerlang Set 4 (B)

3/5

Hulu Langat District Science Panel 2007

SECTION B

3 A group of pupils have carried out an investigation to set up a completeelectric circuit. The figure 3 are the apparatus use to set up the experiment.

Figure 3

The table 1 shows the results of this investigation .

The number of dry cells 1 2 3

Brightness of bulb Dim Bright Very bright

Table 1

(a) What is the aim of the investigation?

(1mark )

(b) State what must be keep the same in this investigation.The _________________________________________________________________________

(1mark

)

(c) What is the relationship between the number of dry cells and the brightness of bulb?

________________________________________________________________________

(1mark)

(d) Draw a symbol of a dry cell in the box below.

(1mark)

Marks

8/14/2019 Modul Cemerlang Set 4 (B)

4/5

Hulu Langat District Science Panel 2007

SECTION B

4 The Figure 4 shows an investigation carried out to determine the size of shadowformed on the screen when the distance between the object and the light source

varies. When the object is placed nearer to the light source, the shadow form is bigwhile the shadow form at Q is small.

Figure 4

(a) Write your observation when an object place between the light source and the screen

The shadow is formed when light that travels in straight line is blocked by an opaque

object.

(1mark)

(b) Describe the difference of shadow formed on the screen at

(i)P : ______________________________________________________________________

(ii) Q: _____________________________________________________________________

(2marks)

(c) In this experiment, state(i) what is change? : The distantween light source and object

(ii) what is kept the same? : The size of an object

(2

marks)

P Q

light source object

screen

Total Marks

Marks

8/14/2019 Modul Cemerlang Set 4 (B)

5/5

Hulu Langat District Science Panel 2007

SECTION B