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HATFA IZZAH Biotogy paper3 Exceil Score 7.2 TIJIASTERING GROUP }SKILLS SATVIPLE ANSWERS GROUP 2 sctENCE PROCESS SKTLLS (SPS) SPs 10 - VaiianG sPs t1- Hiioth;;Eins 18

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Page 1: jawapan buku paper 3 Group 2

HATFA IZZAH Biotogy paper3 Exceil Score

7.2 TIJIASTERING GROUP }SKILLS

SATVIPLE ANSWERS

GROUP 2

sctENCE PROCESS SKTLLS (SPS)

SPs 10 - VaiianG

sPs t1- Hiioth;;Eins

18

Page 2: jawapan buku paper 3 Group 2

HAfFA IZZAH Biology Paper 3 Excell Score

7.2.2 EXERCISES FOR GROUP 2 : ( SPS IO & 1{)

QUESflON '

;HAPTER 3 : MOVEMENT OF SUBSTANCES ACROSS THE PLASMAMEMBRANE

answenlSPS 10 - Variab

(c) (i) should be able to state all the variables and method operating thevariables conectly.

Sample answer :

Variables MethodManrpuratec:Concentration of sucrose solutions Use different conc€ntration of sucrose

solutions: Oo/o,3o/o,So/oand I 5o/o

Recponding:Final length of potato discsr/ Changein length of potato discs/percentage change in length ofpotato discs.

Measure the final length by using the givenscale/ ruler

gontrolled vanaDloiDuration of immersion/Size of potato discs;/ volume olsucrose solutions

Fix the lime duration for the immersion of thepotalo discs./Fix the diameter of the potato discs by usingthe same cork borer for all the discs / measurethe same volume of sucrose solutions using ameasurino cvlinder.

SPS 11 - Hipothesising

(c) (ii) Studenis should be able to state the hypothesis correclly based on the followingcriteria:Kl : State the manipulated variableK2 : State the responding variableK3 : Relationship between Kl with K2

Sample answer:

The higher the concentration of the sucrose solution the shorter the length of the potato discs.

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Page 3: jawapan buku paper 3 Group 2

HAFFA IZZAH Biotogy paperJ Excel Score

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38' Study the movement of substances across the semi permeabremembrane

I

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be able to stare atrttre varii6iEiEio'EEifi6dii

Manipulated variaUtes : How to alter manipulated variables

The readings are taken at the different intervals //The reading are taken at 10 minutes intervals

The rise in the sucrose solution

level

to determine thC manlpulated variAblee-

Measure the rise in the sucrose solution level byusing the scale on the glass tube

Controlled vaiiaUtes

Sucrose solution concentration

/A/olume of distilled water

How to maintain thtE;trolledUsing the same concentration of sucrose solution //Using the same volume of distilled water

lcJfii)studenbK1 : State the manipulated variableK2 : State the responding variableK3 : Relationship between K1 with K2

Sample answer:

The longer the time taken, the higher the rever of sucrose sorution in the scared grass tube

Page 4: jawapan buku paper 3 Group 2

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3C, Sfudy the effect of ieotonic, hypotonic, and hypertonic solution onanimal cell and plant cell

IIAFFA IZZAH Biology Pap€r3 Excelt Score

answeraSPS 10 - Variable

(c) (i) Students be able to state all the variables and method of operating thevariables correctly.

Sample answer :

Variables Method to ooerate the variableManipulated:Percentage of sucroseconcentration

Use different concentration of sucrosesolutions: 1oo/o,30o/o and 50%

Responding:

Volume of the sucrose solution inthe visking tube after 15 minutes

Measure the volume of the sucrose solutionin the visking tube after 15 minutes by usingmeasuring cylinder

Controlled variable:

Duration of immersionilemperature/ volume of sucrosesolutions

Fix the time duration for the immersion of thevisking tube/Fix the temperature of water bathMeasure the same volume of sucrose solutionsby using a measuring cylinder

11 - Hlpothesising(c) (ii) Students should be able to state the hypothesis conectly based on the followingcriteria:K1 : State the manipulated variableK2 : State the responding variableK3 : Relationship between K1 with K2

Sample answer:

As the percentage of sucrose concentration increase , the volume of the sucrose solution inthe visking tube after 15 minutes also increase.

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Page 5: jawapan buku paper 3 Group 2

HAFFA IZZAH Biotogr paper 3 Exce[ Score

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3D' Study the effect of isotonic, hypotonic, and hypertonic sorution onanimal cell or plant cell

SP$ 10 - Variable

and method of operating the

Use different concentration of sucrosesolutions: 'l0o/o,3}o/o and 50%

Final mass of potato strips/ changern mass of potato stripV percentagecnange in mass of potato strips.

Measure the final mass / change in mass ofpotato strips by using triple beam balance// calculate the percentage in mass by usingformula :

Final mass - lnitial mass X 100%

Duration of immersion/temperature/ volume of sucrosesolutions

Fix the time duration for the immersion of thevisking tube/Fix the temperature of water bathMeasure the same volume of sucrose solutionsby using a measuring cylinder

SPS 11 - HipotfresEing(c) (ii) Students shoutd be

K1 : State the manipulated variableK2 : State the responding variableK3 : Relationship between K1 with M

Sample answer:

A$ the percentage of sucrose concentration increase , the volume of the sucros€ solution inthe visking tube after 1S minutes af so incieasel--- '

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Page 6: jawapan buku paper 3 Group 2

HATFA IZZAH Biotogy paper J Exceil Score

* euESr/oNS:

3E. Determine the concentration of solution which is isotonic to the cell3ap

answersSPS 10 - Variable

(c) (i) Students should be able to state att tne varlaUtes and method operating thevariables conectly.

Sample answer :

sPs 11 srng(c) (ii) Students should be able to state the hypothesis conectly based on the followingcriteria:K1 : State the manipulaled variableK2 : State the responding variableK3 : Relationship between K1 with K2

Sample answer:

The concentration of an external solution which is isotonic to the cell sap is theconcentration of the sucrose solution that does not change the length of the potato strip

Variable Method to handle the variableManipulated variableConcentration of sucrosesolution

Use ditferent concentration of sucrose solutions: 0.i M,0.2M,0.3M and 0.4M

Responding variableFinal length of potato strips/change in length of potatostripv percentage change inlength of potato strips.

Measure the final length / change in length of potatostrips by using ruler// calculate the percentage In length by using formula :

Final lenqth - lnitial lenoth X 100%lnitial lenqth

Controlled variableDuration of immersion/Size /length of potato strips/volume of sucrose solution

Fix the time ( 30 min) duration for the immersion of thepotato strips./Fix the diameter of the potato strips by using the samecork borer for all the skips / fix the initial length ( S cm)of potato strips /measure the same volume of sucrosesolutions using a measurinq cvlinder.

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Page 7: jawapan buku paper 3 Group 2

HAFFA IZZAH Biotogy prper 3 Excell Score

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CHAPTER 4 '

(c) (i) $tudents shoutd UG aOte to stlte at tfre

Manipulated variableConcentration of albumen/ substrate Change the concentration of albumen/

substrate

Responding variableTime taken for the albumen to turnclear llRate of reaction of enzyme

Record the tinre taken by using a stopwatch //Calculate the rate of reaction by using theformulae; percentage of albumen / time

Temperature of water bath//pH value//Volume of enzyme/pepsin //Concentration of enzyme/pepsin.

Fix the temperature of water bathl ena'l"nlellFix the pH value llFix the volume of albumen I enzyme llFix the concentration of enzymeipepsin

SPS 11 - Hipoth(c) (ii) Students stroutO Oe aUteloGiiG tirecriteria:Kl : State the manipulated variableK2 : State the responding variableK3 : Relationship between K1 with K2

Sample answer:

The lower the concentration of arbumen suspension, the shorter the time taken for thealbumen to turn clear.//The higher the concentration of arbumen suspension, the ronger the time taken,or thealbumen to turn clear.

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Page 8: jawapan buku paper 3 Group 2

rHAEIA IZZI.II Btotogl' Paper 3 Excefi Score

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CHAPTER 7 : Study the content of oxygen and carbon dioxide in inhalationair and exhalation air

answerltsPs 10 -

(c) (i) Students should be able to state all thevariables conectly.

Sample answer:

and method of operating the

PS 1{ - Hipothesising

(c) (ii) Students should be able to state the hypothesis conectly based on the followingcriteria:K1 : State the manipulated variableK2 : State the responding variableK3 : Relationship between K1 with K2

Sample answer:

As the ac{ivity of a spotman increases , the percentage content of carbon dioxide released isalso incraases.

Variable Method to handle the variableManipulated variableType of activity of a sportsman A sporisman who went through three different

activitiesResponding variableThe length of air column in the J tubeThe contents of carbon dioxide in theexpired air// percentage content ofcarbon dioxide released

Measure the final length of air column by usingJ tube /icalculate the percentage content of carbondioxide released by using formula :

Chanoe in lenoth of air column X 100%Original length of air column

Controlled variableTemperature of air column//Concentration of potassium hydroxidesolution (KOH).

Fix the temperature of air column //Fix the concentration of potassium hydroxidesolution (KOH)

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Page 9: jawapan buku paper 3 Group 2

HAFFA IZZAH Biotogy paper 3 Excefl Score

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CHAPTER 4 : CHEMTCAL COMpOS|T|ON OF THE CELL

48' study the effect of substrate concentration on the rate of enzymereaction

should be able to state all the variablel?nC mE66E

Use different concentration of starch solution il 0.SOo/o,1.00o/o, 1.50% and 2.00%

Responding variables:Time taken //

Rate of reaction

Record the time taken for comptete hydrolysis of starchby using a stopwatch / Record the time taken for theiodine solution to remain unchanged by using a stopwatch //Calculate the rate of enzyme reaction by using a formulaconcentration of starch eolution (%l / time

Temperature of water bath// pH value //Volume ofstarch solution l/ Volume of

Maintain the temperature of water bath at 37oC //Maintain the pH value at 7 /l Use the same volume ofstarch solution // Use the same volume of amylase

SPS 1t(c) (ii) Students should be aUcriteria:K1 : State the manipulated variableK2 : State the responding variableK3 : Relationship between K1 with K2

Sample answer:

The lower /higher the concentration of starch solution, the longer/shorter the time taken forstarch to hydrolysed

'A

Page 10: jawapan buku paper 3 Group 2

HAFFA IZZAH Biology Psper 3 Excelt Score

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CHAPTER 7 : Carry out an activity to show aerobic respiration

answerSSPS 10 - Variable

(c) (i) Students should be able to state all the variabtesvariables coneclly.

Sample answer :

method of operating the

SPS 11 - Hipothesising

(c) (ii) be able to state the hypothesis conectly based on thecriteria:Kl : State the manipulated variableK2 : State the responding variableK3 : Relationship between K1 with K2

Sample answer:

As the temperature of the water bath increases until optimum temperature, the height of the

coloured liquid increases.

Variables Particular to be imolementedPi - Manipulated variables:Temperature of water bath

K1-Set up different temperatures of the water bath,20oC, 30oC, 40oC and 50oC

P2- Responding variables:Height of the coloured liquid //

Rate of respifation

K2Measure the height of the coloured liquid using aruler /

Calculate the rate of respiration using the formulaof height divided by time taken

P3 - Control variables:Volume of the yeast suspensionused / Duration of yeastsuspension in the water bathbefore the expedment sta(s

K3Use 15cm3 ofyeast suspension / Leave the yeastsuspension in the water bath for 5 minutes beforethe experimenl starts

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Page 11: jawapan buku paper 3 Group 2

]IAFFA, IZZAH Biotogv paper 3 Erce[ Score

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CHAPTER 10 : study the effect of air movement on the rate of transpiration.

Scors I Sample anawersSPS 10 - Variable

3 (c) (i) Students shoutd be able to.GteaiitheGriables andvariables conectly.

Sample answer :

meiFoa;f operatfig the

Variables Method to handle the variableManipulated v.Speed of air movemenV airspeed/air movement

-Using fan with different air movemenUair speed1,2 and 3ll

4hange the air speed of fan, speed l, 2 and 3

Respondinq v.Distance of the movement ofair bubble from P to Q in 5minutes

ORRate of transpiration

-Measure the distance between initial level P andfinal level Q after 5 minutes by using a ruler/ meterruler

OR-Calculate the rate of transpiration by using

fOfmUla - Dislan@ the air bubbto mded Cm/min

tire taken

L;onstant v.1.Time taken for the airbubble moved/2.Type of planU3.Temperalure/4.Distance between the fanand balsam

shoot

1. Fixed the lime for 5 minuies/2. Fi/use the same type of plant, balsam/3. Fix the temperature at room temperature,

27 .Cl4. Fix the distance between the fan and balsam

shoot at 30 cm

SPS 11 - Hipothesising3 (c) (ii) Students should be able to state tne

criteria:K1 : State the manipulated variableK2 : State the responding variableK3 : Relationship between K1 with K2

Sample answer:

As the air speed increases, the distance of the movement of air bubble from p to e in bminutes increases.

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Page 12: jawapan buku paper 3 Group 2

IHAFFA IZZAH Biology pap€r 3 nxcefl Score

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CHAPTER 6 : Dotermlno the energy value in food sample

(c) (i) Students should be abte to state ait ttrelaril6iEiaiEvadables conectly.

operating the

SPS 11 - Hipothesising(c) (ii) should be ableto statetne nypotnes@criteria:K1 : State the manipulated variableK2 : State the responding variableK3 : Relationship between K1 with K2

Sample answer:

Final temperature of water after peanut has been bumt is higher than that the white bread

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Variables Particular to he imnlementcdP1 - Manipulated variables:Type of food/ food sample

K1-replace white bread with peanut, bean// usingdifferent type of food

P2- Responding variables:lncreasing of temperature// finaltemperature al waler ll

the energy value in the food

K2measure/ joV record final temperature of water byusing a thermometer

calculate the energy value by using the formula,

M@ of x spoci8c heai apacitt of x tlDpent@water watet imcre

df foodEnergr value =

t 3 - L;ontrol variables:Volume of water/ initial watertemperature/ boiling tubespecitication

K3Fix 59 of food sample using weighing machine, /using the same volume of distilled water 20mlusing measuring cylinder / Fix the initial watertemperature at 29oC using thermometer

Page 13: jawapan buku paper 3 Group 2

HAtgA IZZAH Biotogy paper 3 Exceil Score

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be able to state atllE

r I - rnantputatColour of cloth By changing the white cloth with black and

multicoloured pattemed cloth.

Number of buttons taken To take, count and record the number ofbuttons taken from each cloth

rit - Uontrol variables:Size of cloth, 20 cm x 20 cm Fix the size of cloth, 50cm x S0 cm

(c) (ii)€tudents.

Kl : State the manipulated variableK2 : State the responding variableK3 : Relationship betweeln Kl with K2

Sample answer:

The more obvious the difference in corour between the croth and the button, the more thenumber of that button will be taken.

30

Page 14: jawapan buku paper 3 Group 2

,lAtfl IZZAII Bhlosy Paper 3 Exce ll Score

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CHAPTER 9 : Study the air pollution level from different environments

Score Sample answersSPS 10 - Variable

3 (c) (i) Students should bevariables conectly.

Sample answer :

to state all the variables and method of operating the

SPS 11 - Hipotheslsing

3 ic) (ii) Students should be able to state the hypothesis conectly based on the following:riteria:(1 : State the manipulated variableK2 : State the responding variableK3: Relationship between K1 with K2

Sample answer:

The time taken for the methylene blue solution to decolourise water sample K is faster

compare to water sample L and M.

31