kertas 2 ppt sains setara sbp 2008

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  • 8/2/2019 Kertas 2 PPT Sains Setara SBP 2008

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    SULIT

    55/2 2008 Hak Cipta Sektor Sekolah Berasrama Penuh SULIT

    PEPERIKSAAN PERTENGAHAN TAHUN 2008 55/2

    TINGKATAN 3SCIENCE

    Kertas 2

    Mei 2008

    1 jam Satu jam tiga puluh minit

    SEKTOR SEKOLAH BERASRAMA PENUHKEMENTERIAN PELAJARAN MALAYSIA

    JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

    Kertas soalan ini mengandungi 15 halaman bercetak

    [Lihat sebelah

    1. Tulis nama penuh dan tingkatan anda padaruangan yang disediakan.

    2. Kertas soalan ini adalah dalam BahasaInggeris.

    3. Calon dikehendaki membaca maklumat dihalaman belakang kertas soalan ini.

    Untuk Kegunaan Pemeriksa

    Kod Pemeriksa:

    Bahagian SoalanMarkah

    Penuh

    Markah

    Diperoleh

    A

    1 6

    2 6

    3 6

    4 6

    5 8

    6 8

    B

    7 8

    8 12

    JUMLAH 60

    NAMA PELAJAR

    TINGKATAN

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    Section A

    [40 marks]

    Answerall questions.

    1 Diagram 1 shows part of the leaf structure.

    DIAGRAM 1

    (a) (i) On Diagram 1, label structure P , Q and R using the following words.

    [ 3 marks ]

    (ii) Draw lines to show the correct match between the structures and their

    functions.

    Structure Functions

    [3 marks]

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    2

    Nucleus Guard cell Stomata

    P

    Q

    R

    control all activities of the cell

    control the opening and closing of the stoma

    allow the water vapour passes out of the leaf

    carries out photosynthesis

    R:P:

    Q:

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    2 Diagram 2 shows a longitudinal section of a dicotyledon bean.

    DIAGRAM 2

    (a) On Diagram 2 , label the structure of the bean using the following words.

    [ 3 marks ]

    (b) What is the function of the testa?

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

    [1 mark]

    (c) What will happen to the green bean when we put it into moist soil?

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

    [1 mark]

    (d) State one method to keep the bean in good condition for a long time.

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

    [1 mark]

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    3

    Plumule Radicle Testa

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    3 Diagram 3 shows an experiment set-up to study the effects of cigarette smoke.

    DIAGRAM 3

    (a) (i) After the filter pump is switched on, state the colour change of the moist whitecotton wool.

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

    [1 mark]

    (ii) Name the substance in the cigarette smoke that causes the changes in the colour

    of the moist cotton wool?

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

    [1 mark]

    (b) What can you tell about the cigarette smoke based on the change in colour of the

    bicarbonate indicator?

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

    [1 mark]

    (c) Name one disease that can develop as a result of prolonged and heavy smoking of

    cigarettes?

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

    [1 mark]

    (d) Name two pollutants contained in cigarette smoke?

    (i) .............................................................................................................................

    (ii) .............................................................................................................................

    [2 marks]

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    4 Diagram 4 shows the interdependence among living organisms and their environment.

    DIAGRAM 4

    (a) Name the producer in Diagram 4.

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

    [ 1 mark]

    (b) Based on the diagram, construct two food chains.

    (i) ..........................................................................................................................

    (ii) ..........................................................................................................................

    [2 mark]

    (c) Name the organisms that act as secondary consumers in the diagram.

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

    [1 mark]

    (d) Based on the food chains in (b) (i) and (b) (ii), predict what will happen if all the

    mouse and big fish died?

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

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

    [2 mark]

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    5

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    5 Diagram 5.1 shows a bimetallic strip of iron and brass, used in several electrical

    appliances to control the temperature.

    DIAGRAM 5.1

    (a) (i) Name the device that controls the temperature of an electrical appliance.

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

    [1 mark]

    (ii) Give one example of electrical appliance that has the device mentioned in (a)

    (i).

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

    [1 mark]

    (b) Which principle does the metallic strip work on?

    Circle your answer in the box below.

    Radiation Expansion Convection

    [1 mark]

    (c) (i) Draw the shape of the bimetallic strip in the box below when the temperature

    in the electrical appliance increases.

    [1 mark]

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    brassiron

    contact

    Non conductor

    6

    brass

    iron

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    (ii) Give an explaination on the shape of the bimetallic strip.

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

    [1 mark]

    (d) Diagram 5.2 shows the circuit of a fire alarm at room temperature.

    DIAGRAM 5.2

    (i) What is the function of a fire alarm?

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

    [1 mark]

    (ii) Complete the sentence below to show how a fire alarm works.

    When a fire occurs, the higher temperature causes the unequal expansion of

    bimetallic strip. ...................................................................................................

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

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

    [2 marks]

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    6 Diagram 6.1 shows an application of the Principle of Air Pressure in our daily life.

    DIAGRAM 6.1

    (a) (i) Name the tool featured in the above diagram.

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

    [1 mark]

    (ii) What is the function of the tool identified in (a) (i)?

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

    [1 mark]

    (iii) On Diagram 6.1, mark the area of the pipe that has low pressure with W and

    high pressure with X.

    [1 mark]

    (b) Based on the Principle of Air Pressure, explain how the tool in (a) (i) works.

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

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

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

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

    [2 marks]

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    (c) Diagram 6.2 shows three different situations in handling gas under high pressure.

    State the appropriate safety precautions for each situation, J, K and L.

    DIAGRAM 6.2

    (i) J - ..................................................................................................................

    (ii) K - ..................................................................................................................

    (iii) L - ..................................................................................................................

    [3 marks]

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    Section B

    [20 marks]

    Answerall questions.

    7 Diagram 7 shows four devices that use the principle of levers, J, K, L and M.

    DIAGRAM 7

    (a) Observe the levers in Diagram 7.

    Based on your observations, state one characteristic of each lever J, K, L, and M.

    J : ...............................................................................................................................

    K : ..............................................................................................................................

    L : ...............................................................................................................................

    M : ..............................................................................................................................

    [4 marks]

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    (b) Classify levers J, K, L, and M in Diagram 7 into two groups based on their common

    characteristics. Write the name of the levers belonging to each group.

    [4 marks]

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    8. A pupil carried out an experiment to determine the time taken for ten complete swings of a

    pendulum for various lengths of string, as shown in Diagram 8.1 below.

    Diagram 8.1

    (a) Based on Diagram 8.1, state the operational definition of one complete swing.

    ...

    [1 mark]

    (b) State the variables involved in this experiment.

    (i) Manipulated variable: ..

    (ii) Responding variable: ...

    (iii) Constant variable: ........

    [3 marks]

    (c) Diagram 8.2 shows the stop watch used to record the time taken for the pendulum to

    make ten complete swings with different lengths of string.

    The length of pendulum = 15 cm The length of pendulum = 30 cm

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    Pendulum

    bob

    X Y

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    The length of pendulum = 45 cm The length of pendulum = 60 cm

    The length of pendulum = 75 cm The length of pendulum = 90 cm

    Diagram 8.2

    Based on Diagram 8.2, record the readings of the stop watch in Table 8.3.

    Length of pendulum (cm) 0 15 30 45 60 75 90

    Time taken for ten complete

    swings (s)0 10 60

    Table 8.1 [2 marks]

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    (d) Based on Table 8.3, plot a graph the time taken for ten complete swings against the

    length of the pendulum.

    [3 marks]

    (e) State the relationship between the time taken for ten complete swings with its length.

    .......

    [1 mark]

    (f) Based on the graph in (c), predict the time taken for ten complete swings if the length

    of the pendulum is 50 cm.

    .... s

    [1 mark]

    (g) If the length of the pendulum is 45 cm, calculate the time taken forone complete

    swing.

    .... s

    [1 mark]

    END OF QUESTION PAPER

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    14

    Timeta

    kenfortencompleteswings(s)

    100

    80

    60

    40

    20

    0

    00

    10 20 30 40 50 60 70 80 90 100Length of pendulum (cm)

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    INFORMATION FOR CANDIDATES

    1. This question paper consist of two sections: Section A and Section B.

    2. Answer all questions in both sections.

    3. Write your answers in the spaces provided in the question paper.

    4. Show your working, it may help you to get marks.

    5. If you wish to change your answer, neatly cross out the answer that you have done. Then

    write down the new answer.

    6. The diagrams in the questions provided are not drawn to scale unless stated.

    7. Marks allocated for each question or sub-part of a question are shown in brackets.

    8. The time suggested to complete Section A is 60 minutes and Section B is 30 minutes.

    9. You may use a non-programmablescientific calculator.

    10. Hand in this question paper at the end of the examination.

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