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SEKTOR SEKOLAH BERASRAMA PENUH

KEMENTERIAN PELAJARAN MALAYSIA

PEPERIKSAAN PERTENGAHAN TAHUN 2010

SAINS

Kertas 2

Satu jam tiga puluh minit

JANGAN BUKA KERTAS SOALAN INISEHINGGA DIBERITAHU

1. Tuliskannamadankelasanda pada ruang yang disediakan .

2. Kertas soalan ini adalah dalam Bahasa Inggeris .

3. Calon dikehendaki menjawab semua soalan.

Kertas soalan ini mengandungi 16 halaman bercetak

[Lihat sebelah

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1

SULIT

55/2

Sains

Kertas 2

Mei

2010

1 jam

NAME

KELAS

Kod Pemeriksa

Bahagian Soalan MarkahPenuh

MarkahDiperolehi

A

1 5

2 6

3 6

4 8

5 6

6 9

B7 8

8 12

Jumlah 60

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Section A

[40 marks]

Answerall questions.

1 Diagram 1 shows a longitudinal section of a flower.

DIAGRAM 1

(a) On Diagram 1, label structures Q and Rusing the following words.

[ 2 marks ]

(b) State one function of structure R in Diagram 1.

..............

[ 1 mark]

(c) What will the structure P develop into after fertilization?

............

......

[ 1 mark]

(d) Name the process of transferring ripe pollen from the anther of a flower to the stigmaof another flower on the different plant of the same species.

..........................[ 1 mark]

2

P

R:

Q:

Ovule Ovary Sepal

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3

1 Diagram 2 shows the fractional distillation of petroleum.

DIAGRAM 2

(a

)Which of the fraction in Diagram 2 represent

(i) petrol: .................................

(ii) lubricating oil : ..................[2 marks]

(b

)

Why does fractional distillation can produce various petroleum components?

......

[1 mark]

(c)

What are the two characteristics of the fractions as the boiling point increases ?

(i) ....

(ii)

[2 marks](d

)

State the use of bitumen.

Bitumen: ..........[1 mark]

2 Diagram 4 shows a menstrual cycle of a woman.

Petroleumm

Furnace

Petroleum gas

Bitumen

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2 Figure 6 shows the set-up for an experiment to determine the action of heat on acidic

potassium dichromate (VI) solution.

FIGURE 6

a) i) Describe the colour change of the acidifide potassium manganate (VII)solution.

_____________________________________________________

(1 mark )

ii) Name the solution that can be used to substitute acidifide potassiummanganate (VII) solution

.

______________________________________________________

( 1 mark )

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b) State the two elements found in the magnesium sulphide.

i) ______________________________________________

ii) ______________________________________________

( 2 marks )

c) Write the word equation for the reaction of heat on magnesium sulphide.

heat +

( 1 mark )

d) Name the white residue produced.

________________________________________________________

( 1 mark )

3 Diagram 6.1 shows three cupboards R, S and T with some heavy books stored in it.

Cupboard R

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Cupboard S

Cupboard T

DIAGRAM 6.1

(a

)On Diagram 6.1, mark X at where the centre of gravity of the three cupboards

will be.[3 marks]

(b)

(i) Which cupboard is more stable?

...........................................................................................................................

[1 mark]

(ii) Give one reason for your answer in (b) (i).

...........................................................................................................................

.

[1 mark]

(iii) Using the letter in Diagram 6.1, complete the diagram below to show thestability of the cupboards in descending order.

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[1 mark]

(c) Diagram 6.2 shows a giraffe drinking water from a pond.

DIAGRAM 6.2

Based on Diagram 6.2,

(i) How the giraffe maximise its stability?

.............................................................................................................................

[1 mark]

(ii) Explain your answer in (c) (i).

.............................................................................................................................

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.............................................................................................................................

[2 marks]

Part B

Bahagian B[20 marks][20 markah]

Answerall questions.

Jawabsemuasoalan

7. Diagram 7 shows four types of plants.

(a) State the type of support system for each of the plants.

P : ...............................................................................................................................

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Q : ..............................................................................................................................

R : ...............................................................................................................................

S : ..............................................................................................................................

[4 marks]

(b) Classify the plants in Diagram 7 into two groups based on common

characteristics.

[4 marks]

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8. (a) The diagram 8.1 below shows some wet clothes hung on a line under

different conditions.

Condition A Condition B

Diagram 8.1

(i) Based on your observations in the diagram 8.1, state the difference in the time taken

for the clothes to dry in Condition A and Condition B.

.............................................................................................................................

.............................................................................................................................

[1 mark]

(ii) What inference can be made based on Condition A and Condition B in the diagram

above?

.............................................................................................................................

.............................................................................................................................

[1 mark]

(iii) State one hypothesis based on your observations in the diagram above.

.............................................................................................................................

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.............................................................................................................................

[1 mark]

(b) A student carried out an experiment to investigate Condition A and Condition B. Thediagram 8.2 shows an experiment to determine how the temperature of the surrounding

affects the rate of evaporation.

Diagram 8.2

Based on the diagram 8.2, record the time taken for the drop of water on the cobaltchloride paper to dry in the table below.

Condition Time taken for drop of water on the

cobalt chloride paper to dry (min)

With heat source

Without heat source

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[2 marks]

(c ) Based on the readings in the table above, draw a bar chart to show the time taken for the dropof water on the cobalt chloride paper to dry in different conditions.

[2 marks]

(d) Based on the bar chart in (c), what can be said about the time taken for the drop of water on

the cobalt chloride paper to dry?.............................................................................................................................

.............................................................................................................................

[1 mark]

(e) Based on the experiment, state the relationship between the temperature of the surrounding

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and the rate of evaporation.

.............................................................................................................................

.............................................................................................................................

[1 mark]

(f) State the variables involved in this experiment.

Manipulated variable

Responding variable

Constant variable

[3 marks]

< Good luck >

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Prepared by,

(SARINA BINTI AZMI RAIS)

Sciences Teacher

Verified by,

(PN FAZIDAH A. SANI )Head of Science & Math Department