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    1. A student carried out an experiment to study the relationship between the lengthof a pendulum and the time taken for the pendulum to make one complete swing.The apparatus set-up is shown in Figure 1.1.

    The procedures to carry out the experiment are as follows:

    S 1 A pendulum bob is tied to a string and hung on a retort stand as shownin Figure 1.1

    S The time taken for the pendulum to make 1! complete swings is taken.S " The experiment is repeated with different lengths of the pendulum

    string.S # The results are tabulated in Table 1.

    $a% State the &ariables in&ol&ed in this experiment.

    'anipulated &ariable: (((((((((((((((((((..

    )esponding &ariable: (((((((((((((((((((..

    Fixed &ariable: (((((((((((((((((((..

    *" marks+

    E1

    ,endulum bob

    ne complete swing

    F/0) 1.1.

    2ength of pendulum

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    $b% Table 1. shows the results of the experiment. 3alculate the time taken forone complete swing and complete table 1..

    2ength of thependulum $cm%

    Time taken for 1!complete swings $s%

    Time taken for 1complete swing $s%

    1! 4.!! 1!.!

    "! 1.!

    #! 1#.!

    5! 16.!

    6! 14.!

    TA72 1.*" marks+

    $c% 0sing Table 1.8 draw a line graph to show the relationship between thelength of the pendulum and the time taken for one complete swing.

    * marks+$d% 7ased on the graph8 what can be said about the time taken for the pendulum

    to make one complete swing9

    E2

    !.

    !.#

    !.6

    !.4

    1.!

    1.

    1.#

    1.6

    1.4

    Timetakenforoneoscillation$s%

    .!

    2ength of pendulum $cm%

    1! ! "! #! 5! 6! !

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    $a% State the &ariables in&ol&ed in the experiment.

    'anipulated &ariable: (((((((((((((((((((..

    )esponding &ariable: (((((((((((((((((((..

    Fixed &ariable: (((((((((((((((((((..

    *" marks+

    $b% Table . shows the results of the experiment.

    Table .

    $b%$i% 7ased on Table .8 what can be said about the changes in the colour of the

    bicarbonate indicator9

    Test tube Colour of bicarbonate indicator

    Initial EndA )ed =ellow

    7 )ed =ellow

    3 )ed )ed

    E4

    F/0) .1

    )ubberstopper

    7icarbonateindicator

    ,lant shoot

    7icarbonateindicator

    7

    /rasshopper

    7icarbonateindicator

    A

    e

    3

    e

    )ubberstopper

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    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;*1 mark+

    $b%$ii%

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    $a% State the &ariables in&ol&ed in this experiment.

    'anipulated &ariable:(((((((((((((((((((((((

    E7

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    )esponding &ariable: (((((((((((((((((((((((

    3ontrolled &ariable: (((((((((((((((((((((((

    *" marks+

    $b% 7ased on Figure ".18 record the time taken for the candle to burn in differentcontainers.

    Container Time taken for candle to burn (s)

    ?

    =

    @

    *" marks+

    $c% 7ased on the table in $b%8 draw a bar chart to show the time taken for thecandle to burn in different containers.

    * marks+$d% 7ased on the bar chart in $c%8 what can be said about the time taken for the

    candles to burn9

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    E8

    1!

    !

    "!

    #!

    Timetakenfo

    rcandletoburn$s%

    2ength of pendulum $cm%

    3ontainer

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    $e% State one inference from the experiment.

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    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    $f% State the relationship between the si>e of the container and the time takenfor the candle to burn.

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;*1 mark+

    $g% A student drilled some holes on a container as shown in Figure ".. n which

    container will the candle burn the longest9 3ircle the correct answer.

    P Q R

    *1 mark+

    #. A student carried out an experiment to study the effect of surface area on thee&aporation of water.Three eually damp filter papers8 ,8 B and ) are left to dry under the sameconditions as shown in Figure #.1. , is left unfolded8 B is folded into half and ) isfolded into uarter. The time taken for the filter papers to dry is shown in Table #..

    E9

    , B )

    F/0) #.1

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    Filter Paper Time taken for filter paper to dry (s)

    , !!

    B "!

    ) #5!

    TA72 #.

    $a% State the &ariables in&ol&ed in this experiment.

    'anipulated &ariable: (((((((((((((((((((..

    )esponding &ariable: (((((((((((((((((((..

    3ontrolled &ariable: (((((((((((((((((((..

    *" marks+

    $b% State the hypothesis for the experiment.

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    $c% 0sing Table #.8 draw a bar chart to show the time taken for the filter papersto dry.

    E10

    #!!

    1!!

    !!

    "!!

    Timetakenforfilter

    papertodry$s%

    Filter paper

    5!!

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    *" marks+

    $d% 7ased on the bar chart in $c%8 what can be said about the time taken for thefilter papers to dry9;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    $e% State oneinference from the experiment.

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    $f% State the relationship between the surface area of the filter paper and the timetaken for the filter paper to dry.

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    E11

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    $g% 5! mC of water is poured into each of the three different containers8 ? = and @as shown in Figure #.". The three containers are left under the Sun.

    $i% n which container will the water e&aporate the fastest9

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    *1 mark+

    $ii% xplain your answer in $g%$i%.

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    *1 mark+

    5. A student carried out an experiment to study the effect of different types ofsurfaces on frictional force.The readings of the spring balance when the wooden block is pulled alongdifferent surfaces are shown in Figure 5.1.

    E12

    ? = @

    F/0) #."

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    (((((((((((((((((((((.

    *" marks+

    $b% 7ased on Figure 5.18 record the readings of the spring balance in Table 5..

    Type of surface Reading of spring balance ()

    /lass surface (((((((((((((((((((((.

    'arble top (((((((((((((((((((((.

    3ement floor (((((((((((((((((((((.

    TA72 5.* marks+

    $c% 7ased on Table 5. draw a bar chart to show the frictional force acting on thewooden block on different surfaces.

    * marks+

    $d% 7ased on the bar chart in $c%8 what can be said about the frictional force actingon the wooden block9

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    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    E14

    1

    #

    6

    Frictionalforce$D%

    Type of surface

    5

    "

    !

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    $e% State oneinference from the experiment.

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    $f% ,redict the reading of the spring balance if the wooden block is pulled along

    $i% a sandy beach: ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    $ii% a waxed marble floor: ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    * marks+

    $g% 7ased on the experiment8 state the relationship between the types of surfaceand the frictional force acting on the wooden block.

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    6. A student carried out an experiment to determine a factor that affects thestability of an obEect.Three similar wooden blocks8 ,8 B and ) with legs of the same length are placedon three boards as shown in Figure 6.1.

    E15, B )

    7oard7oard 7oard

    F/0) 6.1

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    The board is then slowly tilted until the wooden block topples as shown in Figure6.. The angle of inclination of the board is then recorded in Table 6.".

    !lock "ngle of inclination (#$)

    , #5!

    B 66!

    ) 5!

    TA72 6."$a% State the &ariables in&ol&ed in the experiment.

    'anipulated &ariable: (((((((((((((((((((((.

    )esponding &ariable: (((((((((((((((((((((.

    3ontrolled &ariable: (((((((((((((((((((((.

    *" marks+$b% 0sing Table 6."8 draw a bar chart to show the angle of inclination for each of

    the models to topple.

    E16

    Angle of inclination8 ?!

    F/0) 6.

    #!

    1!

    !

    "!

    Angleofinclination$!%

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    *" marks+

    $c% 7ased on the bar chart in $c%8 what can be said about the angle of inclinationto topple each wooden block9

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    $d% $i% 7ased on your obser&ation8 which wooden block is the most stable9

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    $ii% xplain your answer in $e%$i%.

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+$e% 7ased on Figure 6.#8 predict the angle of inclination for block S to topple.

    E17S

    7oard

    F/0) 6.#

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    $f% State the relationship between the angle of inclination of the board to thestability of the wooden block9

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    *1 mark+

    $g%

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    The procedure of experiment is as follows:

    S1 Two potometers were set-up as shown in Figure .1.S The initial water le&el in the potometers was recorded.S" , was put in still air while B was put in the wind for "! minutes.S# The distance mo&ed by the water le&el in the calibrated pipette in , and B

    were recorded in Table ..

    ,otometer

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    The reading shown is ;;;;;;;;;;;;;;;; mC.

    *1 mark+

    $c% State the &ariables in&ol&ed in the experiment.

    'anipulated &ariable: (((((((((((((((((((((.

    )esponding &ariable: (((((((((((((((((((((.

    Fixed &ariable: (((((((((((((((((((((.

    *" marks+

    $d% 7ased on Table .8 draw a bar chart to show the water lost from , and B.

    * marks+$e% From the bar chart8 what can you say about the water lost from , and B9

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    *1 mark+

    $f%

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    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    $g% State the relationship between the wind and the rate of transpiration.

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    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

    *1 mark+

    $h%

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    The procedure of experiment is as follows:

    Step 1: Set up the circuit using the 1 G resistor.Step : 3lose the switch and obser&e the brightness of the bulb and record the

    ammeter reading.Step ": )epeat step with a G8 5 G and 1! G resistor respecti&ely.

    $a% State the &ariables in&ol&ed in the experiment.

    'anipulated &ariable: (((((((((((((((((((((.

    )esponding &ariable: (((((((((((((((((((((.

    Fixed &ariable: (((((((((((((((((((((.

    *" marks+

    +

    Figure 4. shows the reading of the ammeter when different resistors areconnected to the circuit.

    E22

    1 G G

    5 G 1! G

    F/0) 4.

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    $b% 3omplete Table 4." by recording the reading of the ammeter as shown inFigure 4..

    )esistor $G% 1 5 1!

    )eading of ammeter $A%

    TA72 4."* marks+

    $c% 0sing Table 4."8 draw a line graph of current against resistance.

    E23

    )esistance $G%

    !

    3urrent$A%

    !."

    !.

    !.1

    !.#

    !.

    !.6

    !.5

    !.4

    1.!

    !.

    1 " # 5 6 4 1!

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    * marks+

    $d%