biology form 4 paper 3 quiz & ans

8/17/2019 Biology Form 4 Paper 3 Quiz & Ans

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Spm 2005 Paper 3


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SPM 2006


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SPM 2005 Paper 3 Q2


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SPM 2006 Paper 3 Q2


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ANSWER

YEAR 2005

1 (a) 29,34,40 (b) (i) State two different observations made from Table 1.

1 The temperature of water after burning white bread is 34˚ C.2 The temperature of water after burning peanut is 50˚C

(ii) State two inferences from the observations in (b)(i).

1 White bread burnt and releases low heat energy.2 eanut burnt and releases high heat energy

(c) Comlete Table 2 based on the e!eriment that was carried o"t.

#ariables $artic"lars to be imlemented

%ani"lated variable!ood sample"white bread and peanut

&ow to alter the mani"lated variable#se different food sample i.e white bread and

peanut

'esondin variableTemperature $hanges"energy %alue of foodsample

&ow to determine the resondin variable&easure and re$ord the in$rease intemperature of water by using a thermometer.

Cal$ulate the energy %alue using the gi%enformula

Controlled variable&ass of food sample.

'ir mo%ement and temperature surroundingthe e(periment

&ow to maintain the controlled variable#se the same mass of ea$h sample food )nsure air mo%ement and temperaturesurrounding the e(periment is the same.

(d) State the hothesis for this e!eriment.The rise in temperature for peanut is higher than whitebread." The energy %alue for the peanut is higher than the whitebread.

(e) (i)

!ood sample *n$rease in water temperature +˚C, )nergy %alue +-g 1

,White bread 5 /4.0

eanut 11 1/4./

(ii) *ased on the table in (e)(i), state the relationshi between the food class and the enerval"e of each food samle.White bread $ontains $arbohydrate. eanut $ontains a lot of fat. en$e peanut has higher energy %alue than

whitebr (f) *ased on the res"lt of the e!eriment, what can o" ded"ce abo"t the ener val"e+The energy %alue is the total uantity of heat energy produ$ed when 5g of whitebread is $ompletely burnt in

order to in$rease the temperature of 20ml of water up to 5˚C." The energy %alue is the total uantity of heat energy produ$ed when 5g of peanut is$ompletely burnt in order to in$rease the temperature of 20ml of water up to 11˚C.

() This e!eriment was reeated "sin a cashew n"t. $redict the observation and the ener val"e that will be obtained.The in$rement of temperature and energy %alue of $ashew nut is eual to the in$rement of the peanut. +for the

eual amount of mass,(h) The ict"re shows vario"s tes of food samles

-ood samles with e"ivalent ener val"e aswhite bread ean"t

i$eoiled potato

Corn

&argarinealm oil

Cashew nut


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2 roblem statement What is the $on$entration of su$rose solution that $an maintain the mass of plant tissue

i.e potato6

7b8e$ti%e To determine the $on$entration of su$rose solution that $an maintain the mass of planttissue i.e potato 6

9ariables+ a , &anipulated Con$entration of su$rose soluton+ b , esponding Change in mass of potato $ylinder

+ $ , !i(ed 9olume of su$rose solution same immersing time and surroundingtemperature type of potatoypothesis The higher the $on$entration of su$rose solution the lesser the mass of potato $ylinder

'pparatus Cor: borer 50ml bea:er measuring $ylinder filter paper weighingele$troni$ s$ales ruler :nife stop wat$h.

&aterial otato 0.5; 5.0;10.0;15.0; 20; and 25.0; of su$rose solution

Te$hniue To weigh the $hanges in mass of ea$h potato $ylinder by using weighing ele$troni$s$ale before and after immersing in different su$rose solution.

&ethod"pro$edure1 ' pie$e of medium i( bea:ers are prepared and labelled ' C ? ) and ! . )%ery bea:er is filled with 20$m3 of 0.5;

5.0;10.0; 15.0; 20.0; and 25.0; of su$rose solution respe$ti%ely.4 Two potato $ylinders are pla$ed into ea$h bea:er 5 'fter being immersed for one hour e%ery potato $ylinder is remo%ed dried with filter paper then weighed

and measured to obtain the final reading.@ The results are re$orded in a tableA lot the graph of $on$entration of su$rose solution against the mass of the $ylinder.

resentation of data

Con$entration of su$rose solution";

ea:er mass of potato +g, ?ifferen$e mass of $ylinder +g,

*nitial !inal

0.5 '

5.0

10.0 C 15.0 ?

20.0 ) 25.0 !

Con$lusionased on the plotted graph the line whi$h interse$ts the hori=ontala(is +massa(is, indi$ates that there is no$hange in the mass of the potato $ylinders

This pro%es that the $ell sap of potato $ylinder is isotoni$ to the $on$entration of the su$rose solution at that parti$ular point.

lanning )(periment AB ti$:s 3 m4 @ ti$:s 2 m13 ti$:s 1 m


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biology form 4 paper 3 quiz & ans

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