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NAMA ; .

TINGKATAN ;..

PANITIA SAINS TERAS DAERAH MUAR

FINAL YEAR EXAMINATION 2007FORM 4

SCIENCE

PAPER 2

2 HOURS 30 MINUTES

JANGAN BUKA KERTAS SOALAN

INI SEHINGGA DIBERITAHU

1. Kertas soalan ini mengandungi tigabahagian: Bahagian A, Bahagian B danBahagian C.

2. Jawab semua soalan dalam Bahagian Adan Bahagian B. Bagi Bahagian C,jawab soalan 1 dan mana-mana satudaripada soalan 2 dan Soalan 3.

3. Markah yang diperuntukkan bagi setiapsoalan ditunjukkan dalam kurungan.

4. Masa yang dicadangkan untuk

menjawab Bahagian A ialah 60 minit,Bahagian B ialah 50 minit danBahagian C ialah 40 minit.

Kertas ini mengandungi 11 halaman bercetak termasuk halaman ini

Hak Cipta Panitia Sains Teras Daerah Muar

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Bahagian Soalan Markah

Penuh

Markah

Diperolehi

A

1 5

2 5

3 5

4 5

B

5 5

6 5

7 5

8 59 5

10 5

C

11 10

12 10

13 10

Jumlah

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Section A(20 marks)

Answerall questions

1 Figure 1 shows the apparatus used in an experiment.

The table below shows the results of the experiment.

(a) What is the(i) manipulated variable?

(ii) responding variable?

.[2 marks]

(b) What is the room temperature when this experiment is carried out?

.[1 mark]

I Suggest a suitable hypothesis for this experiment.

[1 mark]

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Amount of salt added (g) 0 5 10 15 20

Temperature of the solution (C) 29 27 25 23 21

2

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2 Table below shows the result of an experiment to study the electrical conductivityof atomic, molecular and ionic substances.

(a) What inference can be made from the result in table above?

.

.

[1 mark]

(b) Predict whether sodium chloride (an ionic substance) is able to conduct electricity in thesolid and molten condition?

Solid: ..

Molten: .

[1 mark]

I State the variable in this experiment.

(i) Manipulated variable

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

(ii) Responding variable

..

[2 marks]

(c) What is the operational definition ofatomic substance in this experiment

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

[1 mark]

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Substance Particles in itCondition of lamp

Substance in

solid state

Substance in

molten/liquidstate

Lead (atomic substance) Atoms Lamp lights up Lamp light up

Sulphur (molecularsubstance)

Molecules Lamp does notlight up

Lamp does notlight up

Lead bromide (ionicsubstance)

Ions Lamp does notlight up

Lamp light up

3

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3 Figure 2 shows an experiment to study the changes in state of matter.

Figure 2

The temperature of the ice cubes is recorded every 2 minute until it boil. The table below shows theresult of the experiment.

Time(minute) 0 2 4 6 8 10

Temperature(oC) 0 0 20 60 100 100

Table 2

(a) Based on the table 2, draw a graph of temperature against time. [2 marks]

(b) What happen when the ice particles are heated

.[1 mark]

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I Name the conversion process of

(i) ice becoming water

.

(ii) water becoming steam

[2 marks]

4 Figure 3 represents an object X is placed between F and 2F of a convex lens.

Figure 3

(a) Complete the diagram in figure 3 to show the formation of the image.[2 marks]

(b) State two characteristics of the image.

(i)

(ii) .. [2 marks]

(c) What is the measurement size of the image?

.

[1 mark]

(d) Name one optical instrument which uses the principle shown in your completed diagram.

[1 mark]

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5

X

2F FO

F 2F

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Section B(30 marks)

Answerall questions

5 Figure 4 shows a neurone.

(a) What is the neurone shown in Figure 2?

[1 mark]

(b) Give a reason for your answer in (a)

.[1 mark]

I Name the parts labeled.

(i) X : ..

(ii) Y : ..

[2 marks](d) Give one example of a body part that acts as a receptor.

.[1 mark]

6 Figure 5 shows how a hormone is released to control the glucose level in theblood.

Figure 5

(a) Name a class of food which increases glucose level in the blood.

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6

Blood circulatory system

Food intake

Normal level of blood

glucose

Blood glucose level

increases

Cells in the bodyHormone is released

YX

dendrite

direction of impulse

Figure 4

receptor

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[1 mark ]

(b) i).What hormone is released by the body to control the level of glucose?

ii) Which gland produces this hormone?.

..[2 marks]

(c) i). What may happen to a person who always excess glucose in hisblood?.

ii) How does he get rid of that glucose ?

[2 marks]

7. Figure 6 shows the results of an investigation carried out to survey the blood groupsof 40 students.

Figure 6

(a) What is meant by the term variation?

[1mark]

(b) i State the type of variation shown in the above diagram.

.

[1mark]

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ii Explain your answer given in (b) i

.[1 mark]

(c ) Give two other examples that have this same type of variation?

1 .

2 [2 marks]

8 Figure 7 shows the arrangement of apparatus for electroplating the iron spoon through theelectrolysis process.

Figure 7a. State the materials used for

i. Anode:..

ii. Cathode:..[2 marks]

b. The switch is turned on for 30 minutes. State what is observed at the

i. iron spoon:..

ii. silver plate:..[ [2 marks]

c. What are the energy changes that occur in the electrolysis process in Figure 4 ?

.[1 mark]

9 Radioactive substances have many uses.

a). Name an instrument that can detect radioactive radiation.

...( 1 mark )

b). State one use of radioactive substances in the following fields:

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i. Medicine

ii. food industry

..( 2 mark )

c) Name the process that takes place in a nuclear reactor which producesnuclear energy to be used for generating electrical energy.

.( 1 mark )

d) Name the centre set up by Malaysia Government to carry out researchregarding radioactive substances.

( 1 mark )

10 Table 5 shows various types of alloys and their compositions.

ALLOYS COMPOSITIONS

Copper nickel Copper and X

A Copper and tin

B Aluminium and magnesium

Carbon steel Carbon and Y

Table 5

a Name substances X and Y .

X :

Y : ( 2 marks )

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b Name substances A and B.

A : .

B : .( 2 marks )

c. Which substances is mixed with carbon steel to increase its ability to withstandcorrosion.

..( 1 mark )

Section C( 20 marks )

AnswerQuestion 11 and eitherQuestion 12 orQuestion 13.11. Read the following statement

A student is provided with distilled water and salt

(a) Write a suitable hypothesis based on the above statement(1 mark)

(b) Describe an experiment to proof the above hypothesis which include the following:

i. Aim of the experiment( 1 mark)

ii. Identify variable

(2 mark)

iii. List of apparatus and substance used.(1 mark)

iv. Method/procedure used(4 marks)

v. Data tabulation.

( 1 mark)

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10

Impurities affect the boiling point of pure

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12 (a) State four differences between physical changes and chemical changes.[4 marks]

(b) The figure below shows several changes observed by a student.

Sublimation of iodine Boiling of water crystals

Dissolving sodium chloride Melting of waxSalt in water

Study the above changes. Explain how you would develop a concept based onthe Information above. Your explanation of the conceot should include the

following:

(i) Identify two common characteristics(ii) Develop the initial concept(iii) Give other examples and non examples in relation to the concept(iv) Explain the actual concept

[ 6 marks]

13 a) A farmer finds the growth of his fruit plants is retards. He needs tofertilize the plant with the ammonium salt fertilizer.State the process that can be used to form the salt fertilizer.Explain the process.

[ 5 marks]

b) The uses of ammonium salt fertilizer continuously will pollute the nearestriver. Explain how the farmer overcomes the pollution of the river.

Your answer should include the following;

- Identify the problem- Clarification the problem- Solving methods- Choose the best method and explain your choice.

[ 5 marks ]

END OF QUESTION

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