pmr trial 2011 sce q&a (perak)

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    SKEMAJAWAPANSAINSKERTAS1

    PERCUBAANPMRNEGERIPERAK2011

    No Jawapan No Jawapan1 B 21 D2 D 22 B3 A 23 D4 D 24 C5 B 25 A6 A 26 C7 C 27 A8 B 28 D9 A 29 B10 B 30 A11 C 31 D12 B 32 C13 C 33 C14 C 34 D15 D 35 B16 B 36 B17 A 37 B18 D 38 C19 D 39 B20 A 40 A

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    JABATAN PELAJARAN NEGERI PERAK

    MARKING SCHEME

    SCIENCE PMR TRIAL PAPER 2 2011

    No Marking scheme Mark

    1 (a) P = Skeletal systemQ = Respiratory systemR = Digestive system

    (b)

    System Function

    Excretory Produce new offspring

    Reproductive Digest and absorb food

    Digestive Removing waste

    111

    3 Total:6m

    2 (a) Cell wall

    (b)

    Thorn Bougainville / Rose / Rattan

    Tendrils Cucumber / Pumpkin / Morning glory

    Breathing root Mangrove

    3 correct 2m2 correct 1m1 correct 0m

    (c) (i) Provide buoyancy // Enable the plant to float / Upright(ii) Lotus / Water hyacinth / Water lily /

    (iii) Pond / Lake / River (Accept for water hyacinth only)

    Reject: pool / Water / well / sea

    1

    2

    111 Total

    6m

    3 (a) (i) Temperature(ii) Salt Y(iii) accept 40 Celcius 45 Celcius

    (b) Increase the volume of water // Stir

    I (i) Use alcohol / Turpentine / Thinner / petrol / Kerosene /

    111

    1

    1

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    Organic solvent(ii) Solvent for paint // Paint can dissolve in the solvent 1 Total

    6 m

    4 (a)

    4 correct 2m3 to 2 correct 1m

    1 correct 0m

    (b) (i) Kidney

    (ii) Y has higher urea content/waste product/mineral salt //Y has high urea /mineral salt content than X

    (c) F Glucose/sugar is present in urine // Urine contains glucose /sugar

    E - The student has diabetes mellitus.( F- fact, E-explaination)

    2

    11

    1

    1 Total6 m

    5

    (a) (i) Diagram contains right direction of arrowNo over lapping lines

    (ii) Able to label X in the diagram

    (b) Using compass

    (c) (i)

    At least 1 arrow with correct direction

    (ii) Right-hand grip rule

    (d) (i) Y has more concentric circle than X

    (ii) Using greater current / Using more dry cells

    1

    1

    1

    1

    1

    1

    1

    P R Q S

    NN X

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    (iii) By changing the direction of the current 1 Total

    8m

    6(a) P Stereoscopic

    Q - Monocular

    (b)

    Note: 2 correct field of vision = 2 m1 correct vision field = 0 m

    (c) P Can judge distance accurately //Produce a three-dimensional image //Has overlapping field of vision

    Q Has bigger field of vision

    1

    1

    2

    1

    1

    11

    Total8m

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    Reject: Can look behind

    (d) P Able to hunt for prey efficiently

    Q Help them to look all around for food //To escape from predator

    7 (a) (i)

    Metals Reading of stop watch (s)

    P 10

    Q 15

    R 25

    (ii) P is a better heat conductor than R //R is a poor heat conductor than P

    (iii) If the metal is a good heat conductor, the less time taken for cobalt chloridepaper turns blue.

    (b)

    Constant variableDistance from heat source /

    Volume of hot water

    Responding variable

    Heat conductivity// reading ofstopwatch //time taken for

    cobalt chloride paper turnsblue

    (c) (i) Aluminium is an electrical conductor because the ammetershows a reading //Sulphur is a poor electrical conductor because the readingof the ammeter is smaller

    (ii) More than 3 but greater than 0.5

    2

    1

    1

    2

    1

    1

    1

    8 (a)

    Step-up transformerTransformer injak-naik

    Step-down transformerTransformer injak-turun

    P, Q, R, S

    (b) (i) Bulb B is brighter than Bulb A // Bulb A is dimmer than Bulb B

    2

    1

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    (b) (ii) The number of turns of wire are more than 5 turns

    (b) (iii) Bulb B is brighter because it has higher number of turns of wire

    (c) 12

    (d)

    Respondingvariable Outputvoltage/Readingofthevoltmeter

    Manipulatedvariable Numberofturnsofwireofsecondarycoil

    (e) (i)

    Note: All points plotted correctly = 1 markStraight line = 1 mark

    (e) (ii) The higher the number of turn of wire of secondary coil, the higher theoutput voltage

    (f) The output voltage is the reading of the voltmeter (depends on the numberof turns of wire of secondary coil

    1

    1

    1

    2

    X

    X

    X

    X

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    2

    1

    1Total12m

    End of the marking scheme

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