2010 ppmr kedah sc2 w ans

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    SCIENCE

    PMR

    Ogos 2010

    PEPERIKSAAN PERCUBAAN

    PENILAIAN MENENGAH RENDAH 2010

    SCIENCE

    KERTAS 2

    PERATURAN PEMARKAHAN

    UNTUK KEGUNAAN PEMERIKSA SAHAJA

    Peraturan pemarkahan ini mengandungi 14 halaman bercetak

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    2

    No. Marking Scheme

    Marks

    Total

    Mark

    1(a)

    (b)

    Able to label parts P, Q, and R correctly

    Answer

    P : Prominence

    Q : Sunspot

    R : Solar flares

    Able to match the phenomenon correctly.

    Answer

    Neutron star

    Bintang neutronBlack hole

    Lohong hitamWhite dwarf

    Kerdil putih

    Y Z X

    1

    1

    1

    1

    1

    1

    3

    3

    Total 6

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    3

    No. Marking Scheme

    Marks

    Total

    Marks

    2

    ( a )

    ( i )

    ( ii )

    1

    2

    ( b )

    ( i )

    ( ii )

    Able to state the method.

    Answer

    Water displacement

    Able to determine the volume of stone

    Answer

    27 ml/cm3 unit must be written

    [ without calculation ]

    Able to determine the volume of cork

    Answer

    3 ml/cm3 unit must be written

    [ without calculation ]

    Able to name apparatus P correctly.

    Answer

    P external calipers

    Able to determine the thickness of boiling tubes wall correctly

    Answer

    (3.0 cm - 2.5 cm) = 0.25 cm unit cm must be written

    1

    1

    1

    1

    1

    1

    2

    2

    2

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    4

    No. Marking Scheme

    Marks

    Total

    ( c ) Able to choose the suitable apparatus correctly.

    Answer

    1 1

    Total 6

    No. Marking Scheme Marks Total

    3

    ( a )

    ( i )

    ( ii )

    Able to name substance L correctly.

    Answer

    Metal/iron/copper/ any example of metals.

    Able to make conclusion based on their properties.

    Answer

    Copper/L is metal which conducts electricity while sulphur/K is non metal

    which does not conduct electricity.

    1

    1 2

    ThreadBenang

    RulerPembaris

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    5

    No. Mark Scheme M

    3

    ( b )

    ( i )

    (b)

    Able to choose the correct sequence correctly

    Answer

    Note: 4 correct , award 2 marks

    3 correct, award 1 mark

    2 or 1 correct, award 0 mark2 2

    4 3

    2

    Mixture of sand , iron

    filings and saltCampuran pasir, serbuk

    besi dan garam

    1

    Ma net

    Salt ,sand and water

    Garam , pasir dan air

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    6

    No. Marking Scheme M

    3

    ( c )

    ( i )

    ( ii )

    Able to give correct observation.

    Answer

    Iron filings are attracted to the magnet but sulphur powder is not attracted to

    the magnet.

    [ accept any suitable answer ]

    Able to state the properties correctly

    Answer

    The product cannot be separated by physical method // The product can be

    separated by chemical method.[ accept any suitable answer ]

    1

    1 2

    Total 6

    No. Marking Scheme M

    4

    ( a )

    (b )

    Able to arrange the sequence correctly

    Answer

    R ,Q, and P

    Able to name the solution correctly

    Answer

    Dilute solution

    1

    1

    1

    1

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    7

    (c )

    (d )

    (i)

    (ii)

    Able to give two factors that affect the rate of dissolving correctly

    Answer

    1. The volume of solvent/water

    2. The temperature of solvent/water

    3. Size of solute/sugar

    4. Rate of stirring

    Able to give the suggestion

    Sample Answer

    Increase the volume of solvent /(distilled) water into beaker R//add more

    water

    Add more (distilled) water to beaker R, so the density of solution will be

    reduced and the egg will sink.

    1+1

    1

    1

    2

    1

    1

    Total 6

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    8

    No. Mark Scheme M

    5

    (a)

    (i)

    (ii)

    (b)(i)

    (ii)

    (iii)

    Able to draw the curve correctly

    Answer

    Able to state the growth pattern

    Answer

    Infancy: Rapid growth

    Adulthood: Minimal growth

    Able to make conclusion based on the graph at the age range 13 to 15

    Answer

    The growth rate of girl is higher than boy.

    Able to explain the factor that make the difference growth rate between the

    girls and boys

    Answer:

    A girl reaches puberty earlier than boy.

    Able to state the age that the girl reaches height of 140 cm

    Answer:

    13 years old

    1

    1+1

    1

    1

    1

    1

    2

    1

    1

    1

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    9

    (c)(i)

    (ii)

    Able to name the disease

    Answer:

    Kwashiorkor (spelling must correct)

    Able to name the class of food

    Answer:

    Protein (reject any example of proteins)

    1

    1

    1

    1

    Total 8

    No. Marking Scheme M

    6(a)(i)

    (ii)

    (b)(i)

    Able to draw electric circuit.

    Sample Answer

    R

    SAble to state the way ammeter and voltmeter are connected.

    Sample Answer

    In circuit R, ammeter is connected in series, while in circuit S,

    voltmeter is connected in parallel.

    Able to state the relationship between V, V1, and V2.Sample Answer

    V= V1=V2 // voltage V is equal to V1 and V2.

    1 + 1

    1

    1

    2

    1

    1

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    10

    (ii)

    (iii)

    (c)(i)

    (ii)

    Able to state the relationship betweenI, I1, andI2.

    Sample Answer

    I= I1 + I2 // The currentIis equal to the sum ofI1

    andI2.

    Able to state the relationship betweenR, R1, andR2.

    Sample Answer

    = +

    Able to state the difference in brightness of the bulb P in Circuit 1 and

    Circuit 2.

    Answer

    Bulb P in Circuit 2 is brighter than Circuit 1 // Bulb P in Circuit 1 lessbrighter or dimmer than Circuit 2.

    Able to give one reason for the answer in (c)(i).

    Answer

    Bulb P in Circuit 2 is arranged in parallel so it receives (more current) /

    (higher voltage) or

    Bulb P in Circuit 1 is arranged in series so it receives (less current) / (less

    voltage )

    *Note: Bulb P in Circuit 2 is arranged in parallel. Wrong!(accept: Bulb P in circuit 2 receives more current/higher voltage)

    1

    1

    1

    1

    1

    1

    1

    1

    Total 8

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    11

    No. Marking Scheme M

    7

    (a)

    (b)

    Able to state the support system

    Answer

    J : ThornK : Tendril

    L : Thorn

    M : Twinning stem

    Able to classify

    Sample answer

    1.

    2.

    11

    1

    1

    2

    2

    4

    4

    with thorn

    K, MJ, L

    without thorn

    J, K, L , M

    J, L, M

    without tendril

    K

    With tendril

    J, K, L , M

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    12

    (c)(i)

    (ii)

    3

    Able to state the condition of aquatic plant

    Answer

    Plant in situation B stands upright but plant in situation A cannot stand

    upright

    Able to state the inference

    Answer

    The plant stands upright because of water buoyancy

    1

    1

    1

    1

    Total 10

    J, K, L , M

    M

    With twinning

    stem