percubaan julai2013 sabah sn2
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1.
Section B
B[20 marks]
[20]
Answer all questions.
Write your answers in the spaces provided.
Nurul carried out an investigation. She recorded the observation.
Diagram 11
Table 1 shows the results of the investigation.
1
Day
1 2 3 4 5 6 7
Number of spoilt fruits
0 0 1 2 4 7 10
Table 1
1
(a) State one observation based on the investigation.
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(b) State one reason (inference) based on your answer in (a).
(a)
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(c) State
what is change (manipulated variable) in this investigation.
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(d) State one way that can prevent the fruits from getting spoilt.
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2. Diagram 2 shows the investigation that has be done by the pupils in Year 5.
2
Diagram 2
2
(a) What can you observe from the experiment?
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(b) State one reason (inference) based on your answer in (a).
(a)
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(c) What can you conclude from the investigation above?
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(d) State what is measured (responding variable) in this investigation.
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3 Table 2 shows the result of an investigation carried out in a particular place
inKuching.
2
Time Direction of shadow9.00 a.m. West /
11.00 a.m. West /
1.00 p.m. -
3.00 p.m. East /
5.00 p.m. East /
Table 2
2
(a) What is purpose (aim) of the investigation?
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(b) What is kept the same (constant variable) in this investigation?
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(c) What conclusion can be made from this investigation?
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The Sun appears from the east to the west.
(d) State the relationship between the position of the Sun and the direction of the
shadow.
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4 Four different sizes of wet handkerchiefts, P, Q, R and S are hung under a rotating
fan.
Diagram 3 shows the time taken for the handkerchiefts to dry.
PQR S
3
Diagram 3
3
(a) What is the trend of change in the time taken for P, Q, R and S to dry?
PQR S
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(b) What is changed (manipulated variable) in this investigation?
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(c) State one reason (inference) about the difference between the time taken for P and S to dry.
PS
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(d) State one relationship between the size of the handkerchief and the time taken for the
handkerchief to dry.
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5. An apparatus is set up as shown in Diagram 4.
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Diagram 4
4
The test is first carried out using a plank covered with a piece of plastic sheet. The time taken by
the toy car to reach the floor is recorded. The piece of plastic sheet is then replaced with a piece of
sandpaper and the test is repeated.
(a) What is purpose (aim) of the investigation?
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(b) Predict the time taken by the toy car to run down the plank covered with plastic sheet
compared to the plank covered with sandpaper.
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(c) State one information gathered in this investigation.
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(d) What is the conclusion for this investigation?
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