JUJ Pahang SPM 2014 Biology K3 Set 2 Skema

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  • 8/10/2019 JUJ Pahang SPM 2014 Biology K3 Set 2 Skema

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    SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014 (SET 2 ) 4551/3

    1SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014

    Question 1

    No Mark Scheme Score

    KB0603 Measuring Using Number

    1(a)

    Able to record all 3 readings for the time taken for salt solution to

    move from mark A to mark B.

    Number of triangles surfaces Time taken/min

    4 42

    8 28

    16 13

    3

    Able to record any 2 readingscorrectly . 2

    Able to record any 1 readingcorrectly. 1

    No response or one reading0

    KB0601 - Observation

    1

    (b)(i)

    Able to state two correct observations based on the following

    aspect :

    P1 : Number of triangles surfaces

    P2 : Time taken for salt solution to move from mark A to mark B

    Sample answer

    1.

    When the number of triangles surfaces is 4, the time taken

    for salt solution to move from mark A to mark B is 42

    minutes.

    2. When the number of triangles surfaces is 16, the time taken

    for salt solution to move from mark A to mark B is 13

    minutes.

    3.

    Increase the number of triangles surfaces increase the time

    taken for salt solution to move from mark A to mark B .

    3

    Able to state one correct observation and one inaccurate

    observation or able to state two inaccurate observation.

    Sample Answer:

    1.

    When the number of triangles surfaces is 4, the time taken

    for salt solution to move from mark A to mark B is the long.

    2

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    2SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014

    2.

    When the number of triangles surfaces is 16, the time taken

    for salt solution to move from mark A to mark B is shortest.

    3. The number of triangles surfaces affects / influence the time

    taken for salt solution to move from mark A to mark B.

    Able to state one correct observation or able to state two

    observations at idea level.

    Sample Answer:

    1. Time taken for Time taken for salt solution to move from

    mark A to mark B are 42 min / 28 min / 13 min.

    2.

    Time taken for Time taken for salt solution to move from

    mark A to mark B increased / decreased

    3.

    Time taken for Time taken for salt solution to move frommark A to mark B change.

    1

    No response or wrong response. 0

    Scoring

    Correct Inaccurate Idea Wrong Score

    2 - - - 3

    1 1 - -2

    - 2 - -

    1 - 1 -

    1- - 2 -

    1 - - 1

    - 1 1 -

    - 1 - 10

    - - 1 1

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    SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014 (SET 2 ) 4551/3

    3SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014

    KB0604 - Making inference

    1(b)(ii)

    Able to state two inferences correctly based on the following

    aspect:

    P1 : surface area

    P2 : diffusion of distilled water / rate of diffusion

    Sample answer

    1.

    (4 triangular) increase / more the total surface area (of the

    potato block), increase rate of diffusion / more ( water will

    diffuse into the potato block.

    2. (16 triangular) decrease total surface area of the potato block

    is the decrerase, rate of diffusion of (water) into the potato

    block

    3. The surface area of the potato block is the lowest/highest, rate

    of distilled water diffusion is lowest/highest.

    3

    Able to make one correct inferences and one inaccurate

    inference

    Sample answers:

    1. The rate of diffusion is highest / lowest.

    2.

    The total surfaces area is the highest / lowest.

    2

    Able to state one correct inference and one inference at idea level.

    Sample Answer:

    1. Water diffuse into potato block

    1

    No response OR wrong response.

    Scoring:

    Score Correct Inaccurate Idea Wrong3 2 - - -

    21 1 - -

    - 2 - -

    1

    1 - 1 -

    - - 2 -

    - 1 1 -

    0- 1 - 1

    - - 1 1

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    4SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014

    KB0610-Controlling variables

    1(c)

    Able to state all 3 variables and the 3 methods to handle the variable

    correctly.

    Sample Answer :

    VariablesMethod to handle the variable

    correctly

    Manipulated variable

    Number of triangles

    surfaces / Total surface

    area

    Use different number of triangles

    (surfaces which are 4, 8, 16 )/

    Change the number of triangles

    surfaces that are 4, 8, 16.

    Responding variable

    Duration/ Time taken for

    salt solution to move from

    mark A to mark B/ Rate

    of Diffusion

    Measure and recordthe time taken

    for salt solution to move from mark

    A to mark B by using stopwatch.

    Calculate the rate of diffusion by

    using the formula:

    Distance from A to B , cm

    Time taken for salt solution to move

    from mark A to mark B, min

    Constant variableConcentration of salt

    solution / Distance from

    A to B / Size of potato

    block

    Fix the same concentration of salt

    solution that is 10%. / Fix the same

    distance from A to B which is 3 cm /

    used the same size of potato block is

    5cm x 7cm

    All 6 ticks

    3

    Able to state 3- 5 ticks 2

    Able to state 1-2 ticks 1

    No response or incorrect response0

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    KB0611-State hypothesis

    1 (d) Able to make a hypothesis based on the following aspect :

    P1 : Manipulated variable ; Number of triangular surface / totalsurface

    P2 : Responding variable ; Time taken for salt solution move from

    A to B / rate of diffusion

    R : Relationship

    Sample Answer :

    1.

    The higher / the number of triangles surfaces, the shorter the

    time taken for salt solution to move from A to B./ vice versa

    2.

    The higher the total surfaces area of potato block, the shorterthe time taken for salt solution to move from A to B./ vice

    versa

    3.The higher the number of triangles surfaces, the higher the

    rate of water diffusion./ vice versa

    4.

    The higher the total surfaces area of potato block, the shorter

    the time taken for salt solution to move from A to B/ vice

    versa

    3

    Able to make a hypothesis relating the manipulated variable andresponding variable inaccurately

    Sample Answer:

    1.

    Different number/size of triangles surfaces, different the time

    taken for salt solution to move from A to B.

    2. The number/size of triangles surfaces, affects the time taken

    for salt solution to move from A to B.

    3. The number/size of triangles surfaces, effects the rate of

    water diffusion

    2

    Able to state a hypothesis relating the manipulated variable at

    idea level, with one aspect correctly.

    Sample Answer :

    1. Different number / size of triangles

    2. Different rate of diffusion

    1

    No response or wrong response if no P1 or P2 no mark for each. 0

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    6SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014

    KB0606 Communicating data

    1(e)(i)

    Able to construct a table which contain the following aspects:

    P1: Able to state the 3 titles with unitscorrectly.P2 : Able to record all data correctly.

    P3 : Able to calculate the rate of diffusion

    Sample answer :

    Number of

    triangular

    surfaces

    Time taken for salt

    solution to move

    from A to B,/cm

    Rate of

    Diffusion,/cmmin-1

    4 42 0.07

    828 0.11

    16 13 0.23

    3

    Any two aspects correct2

    Any one aspect correct 1No response or wrong response. 0

    KB0607 Relationship between space and time

    1(e)(ii)

    Able to plot the graph correctly :

    Criteria:

    P : Correct Axis with label, uniform scale and unit

    : Y axis, Rate of Diffusion

    : X axis, Number of triangles surfaces

    T : All points plotted

    B : Joint all 3 points

    3

    Any two criteria 2

    Any one criteria. 1

    No response or wrong response.

    0

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    KB0608 Interpreting the data

    1(f)

    Able to explain the relationship between the number of

    triangular surface and the rate of diffusion accurately.

    Sample answer:

    R1: Increase the number of triangular surface increase the rate of

    diffusion of water

    E1: Increase total surface area

    E2: More water molecule diffuse in the potato block in the short

    time

    All three aspects

    Note : If R1 wrong, reject E1 & E2

    3

    Two aspects including R1

    Example : R1 + E1 / R1 + E22

    Only R1 stated 1

    No response or incorrect response 0

    KB0609 Defining by operation

    Able to state the operational definition of rate of diffusion based on

    the following aspects:

    P1 : Shows time taken of salt solution move from A to B

    P2 : in different number of triangular surface