HAFfA IZZAH siologr paper3 Exceil Score

9.1 Mastering Group l Aspects

$AMPLE ANSWERSEXPERIMENTING

G ROU P 1 ,",=*"E pRocEss sKrLLs (sps -12)

Aspect 5 - Planning an EipeAment :. Aim / Objective

r Problem Statement

. Hypothesis

o Variables

. Material & Apparatus

r Technique

o Result

. Conclusion

51

IIAFFA IZZAI{ Biology paperJ Exce[ score

Group 1- Experimentinq Exercises

Exercise 1

To determine the suitable temoemfirm r^r ih^ i^r;^^ --,.unchansed iheil;J;-Jtilfi:Tture for the iodine solutions remain

the tem peratGe oiihEidiuil.

remain unchanged.concentration ot amytaieGrzyfie lGffiion

,ffr#,';,f#emeis tne efea orGmp6Elu6on the

fJ*T ji"X jif e, temperature, stopwatch, warer bath. syrinse

7. Resutt - Bonug 2r emperature

(oc) timetaten@remain

i , , pch"anqed(fninl

Rate ofreaction{1/min)

0l+ 5 6

20 t-_405060

The amylase enzymes more active at the temperature 37"Cthan at temperature 20oC.Hypotnesis is acieitlii.."," "

52

llAfFA lZZAll Bioto$/ psper3 Excel Ssr€

lfr rxercise z

Form 4 : Chapler 7 - Resoiration {J Tube)

Tick Aspect S6re Answer

1. AimTo investigate the conlents oiffi

2. Manioulated Variableinhaled air and exhaled air

Responding Variablepercentage of oxygen in inhaled air and exhaled air. percentage ofqlygen in inhaled air and exhaled air.

Fix Variablethe c€ncentration of potassium hydroxide@solution

3. Hypothesis 02lnhaled air has a higher percentage of oxygen when cornpared io

exhaled air.

4. Problem Statement 01ls the conlents of oxygen in lnhaled airltre same as tnat in exhaledair?// Does inhaled air contain the same amount of oxygen as exhaledair?

5. Mat & Apparatus 05J-tube, boiling tubes, a rubbertubing,ffi/beaker'1% Potassium hydroxide solution and 1% alkaline

potassium pyrogallate solution

6. Technique- Bonusl EI Measuring the length otaircolumnfficalculate the percentage of orygen in the sampie of inhaled air andexhaled air usino formula :

% 02 = Lenqth of air column occuoied bv oxvqen X 100%length of air column after using potassium tryarbxiOe sotuton

7. Result - Bonus 2 B2

lnhaled air Exhaled akLength of air column (cm)Length of air column afier usingpotassium hydroxide solution(cm)

Length of air column after usingootassium ovrddrllate /cmlLength of air column occupied byoxygen (cm)

Percentag€ of orygen(o/"\

L Conclusion lnhaled.air has a higher percentage of oxygen when compared toexhaled air. Hypothesis is accepted.

" PLANNING EXP- 03

53

l{AFfA IZZAH Biotogy pap€r J Exceil score

lfr Exercise 3

54

o estimate/ determineTliu{TtrE;;;;;AHJ;'ilt":i;3oj,ult'o.n$zetl-oe;;TriaEecoverageor

A and Bll two exffie-if p-nGpecies

Population s

Quadrat size, Gchool fiEtd.

,Kffifl:::ilerio/What is the percentage *u"species A and B in the school fierci iDoes. the type of plant species affects the percentage coverage /population size / density of the plants ?

Plant species n ana B ll any Z pt"nt.p".i{lE:!,"_gu"rtr"t, r"rk"r pen, A4 paper, graplMeasure.nO// Catcutate rhe percentage coverage .ir'pr"nt 7i"-p"iiii and B using the

IQ!4-ate+covered_by the soecies X 110o/oNumber of quadrats X area of one quaArat

// Calculate the density of plant species using the formula:

7. Result - Bonus I 82Plantspecies

Number/ area ot pEntlffiGG tne

=________-____q!qdratTotalnumber/areaof plantspecies(m2 )

Density/percentagecoveragearea (%)

1 2 3 4 5 6 7 8 I 10

AB

]l.Xi"Tf lnfl :#::i#i.Tfi ;lX,fi Hf i"T""gfi &:Ap,antishigherthan

llAffA EZAH Biotogy paper3 Erceil Score

Ex€rcise 4*

Tick AsDect Score Answer

1. AimTo study the efte*s of Oi

2. Manioultie.l VariahLDistance of seedlings

Responding Variable IhS.sloyh rate of ptants lmaize @height of seedlings / mass of seedlings/numbers of leaves

Fix VariableNumber of seedlings / types oi soi@time taken

3. Hypothesis 02The longer the diaiplants.

4. Problem Statement 01 e orlGnts7-5. Mat & Apparatus 05

Maize seeds, water, garden soil ,

Three planting trays / basins , metre rule , waterproof paint.

6. Technique- Bonusl BIM_eagufe the height of seedting Uy u-ing;Artute-- ORCalculate the grolvth rate of seedlings by using formula =

averaqe heiqhts of seedlingsi /cmtime taken

7. Result - Bonus 2

Thedistanceofseedlings/cm(Travl

The heic rt of seedlinos / cmAverageheights ofseedlings/cm

ThegroMhrate ofseedlingsm/dav

1 2 3 4 5 6 7 I I 10

1ocm{A)

2cm(C)

8. Conclusion

. PLANNING EXFI

The longer the distance of seedlings , the higher the groMh rate ofplants. Hypothesis is accepted.

03

55

HAFFA IZZAH Bbtogy paper 3 Excel score

* ExerciseS

Tostudyttreeffi

r.ignttnte@tvtass / heighr of Hydrilla sp

Initial mass o

As the light intensity increases, th@

Doesrhetieht@

P_Y: : irydriua.pAppararus : Beakers, markelpen, light bulbs (20w,40w,60w, l00w),

weighing machine / metre rule, forcep

l..ord ln..*or recode the height of Hyrilla.p Uy u.'ir* ,ii;' ""'.

7. Result - Bonus 2

tvtasV tengtn oft4.Aritta sp 19

As the light intensity increases, the higher the mass / height of Hydrillasp.Hypothesis is accepted.

56

HAFFA IZZAH Biolse$/ Prper3 Exc€ll Score

* Exercise 6

Form 5 : Chaoter 1 - Plant Transport (Trangpiration)

Tick Asnecl . mre Answer

1, AimTo study the effect of air movement on the rate of transpiration

2 Maninlrlate.l VSpeed of air movement

Responding VariableDistance traveled by air bubble / Rate of transpiration

Fix VariableTime for the movement of air bubble // Temperature // Type of plantused

3. Hypothesis 02As the speed of the air movement increases, the rate of transpirationincreases.

4. Problem Statement 01How does the state / different speed of air movement affec{ the rate oftranspiration?

5. Mat & Apparatus 05Maize seeds, water, garden soil ,

Three planting trays i basins , metre rule , waterproof paint.

6. Technique- Bonusl BIMeasure and record the distance travelled (in a given time) using a ruler

Calculate the rate of transpiration using the formula of distance travelleddivided by time taken

7. Result - Bonus 2 a2

State of airmovement

Time taken for air bubble totravel from X to Y, min

Rate oftranspiration,

cm min-l2 Averaqe

Movino airStill air

8. Conclusion As the speed of the air movement increases, the rate of transpirationincreases. Hypothesis is accepted.

57

* Exerclee 7

Form 5 : Chapter 3 _ Cootdination (Urint

HAEFA I/;ZAH Bbbgv paper3 Excel score

;; ;;;;il;;^,:[:,:. or onnkins difierent votimGii6inEii

waterintakeincrea%

reteasedi@5. Mat & Apparatus

Materials : mineraUdrinking water

Apparatus' t"3$?;ffs/ctrp/mug, measurins cytinder

the votume of urinFEiEIeo aGia-water) by ,"ing ;"rluiii;;;iffi; aner a rrxed hour (of consumins

7. Resull - Bonus 2

of water intat<eGil

As the volume of water intake increases, the volume of urine releasedrncreases. Hypothesis is accepted.

58

HAFFA lZZAtl Biology Faper3 Ercetl Score

9.3 MASTERING GROUP 2 ASPECT

SAMPLE ANSWERSEXPERIMENTING

GROUP 2

GROUP zs'ENcE pRocEss sKrLLs (sps -12)

Aspect 5 - Planning an Experiment :

r Procedure

5q

HAJFA IZZAH Blolog/ paper J Excefl Score

I Answer (\

I sconnc I

I cnnrnrl Ilo*lrt-T-rtlezl.rllprl -rlle+l.rllerl"rl

scoRE 04(./)

ffi

60

Manipulated Vqriablethetemperaffi

-

c,oncentration of amyasffi

::4"I, test tube, temperature, stoplvatch, water bath,synngeList of materialsAmylase enzymes, starch suspension, iodine solution,tissue oaoer_

Responding V€riable

Fix Variable

Mat & Apparatus

Kl (at leaee th.ee item)- Five test tubes are labeled as A, B, C, D and E.- A drop of ditute iodine soturion i;;i.;; ;;;ach srooveof wlrite tile.- 2 ml 0.1 % of amylase enzyme is added to each of the testtubes.- The iodine test is repeated for every five minutes for half anhours.- ffier fi,v.e minutes, a clrop of the mixer from each test tube isimmediatety ptaced in the. first d;;; ;iil;t'"Jnr.,n,ng

iodine solution respectively.

^2 -

? T! of.gtaph :uspensrol is addd to each tesr tuberespectively with the syringe.- The test tubes for each- miier are immersed respectively inK3 (at lease-three temperature) -v 'erFe- five different water bath whit temperature 0oC.200c, 400c,500c and 600c.

K4 (All three item)- The s{opwalch is activa{ed and lime is recorded as zero.- The time taken for the ioOine sotuii;ni"r"ti-""-*ff-.i"

unchang,ed is record..- S',H;.""

longer turns btue_blad< in colour rartren tested with iodineK5 - The test tubes containing the mixture are kept in theirrespectively water bath through",l tfr. ._drirn""il

HAFFA EIAH Biotogr Paper 3 Excel Score

I Answer\ -\I scoruxc I

I cnmsnh I

lo*lfil-7lI pz I ^r I

IprLrIItol.rlt-*]-ll

$coRI 04( J)

ffi

ff gxerctse z

Form 4: Chanter 7 - Resoiration {J Tube}

ManiDulated Variablehhaled air and exhaled air

Responding Variablepercentage of oxygen in inhaled air and exhaled air.percentage of oxygen in inhaled air anQ erhaled air.ttre concentiitipyrogallate solutionFix Variable

Mat & ApparatusJ- tube, boiling tubes, a rubber tubing, a rulei and awashbasin /beaker1% Potassium hydroxide solution and 1% alkaline

potassium pyrogallate solution

PROCEDURE CRITERIA

1 . Put one end of the J-tube into a basin/beaker of wat,en Turn thescrew until 5 cm of water column is trapped inside the capillary tube .

2. Remove the Jtube from the water. Turn the screw again to trap 10 cmof air column inside the capillary tube.3. Put the J- tube back into the water and turn the screw slowly io draw insome water -

4. lmmerse the J-tube in a basin of water about twominutes and measure the length of the air column.

5. Remove waterfrom the J-tube until about 2 mmof water leff at the end of the tube.

6. Dip the end of the J-tube into a beaker ofpotassium hydroxide solution. Tum the screw

slowly to draw in potassium hydroxide into the J-tube .

7. Move the air column forward and backward a fewtimes and measure the length of the air column.

8. Remove potassium hydroxide solution from theJ-tube until 2 mm of it is left at the end of thetube.

9. Repeai steps 6 and 7 by using potassium pyrogallate solution

10. Calculate the percentage of orygen content inthe inhaled air by using formula:

o/o 02 = Lenqth of air column occuoied by oxvqen X 100%length of air column after using potassium hydroiide

solution

1 l. Repeat step 1 to 10 using exhaled air.

61

Lighttntensity@

sp // number of weeks/

60w,100w),weighing machine / metre rule, forcep

Materials : Hydrilla.p@Apparatus :

- Beakers, marker pen, light bulbs (20W, 40W,

1. 250m1 of pond water is placed into 4 beakerswhtch are labelled as A,B,C and D

2' 1 0 pieces of Hydriila sp / aquatic prants are cut of at the sametength .

The heighU length are recorded3. The Mass of Hydrilla sp is then measured by using a weighing

Machine

4. Two.plants species / Hydrilla sp are placed / added to each ofthe beakers by using jtorceps

5. The beakers are placed at different bulb power as followsBeaker A for 20 WattsBeaker B for 40 WattsBeaker C for 60 WattsBeaker D for 100 Watts respectively

Both plants i Hydrilla sp are taken out from each beaker every

The Hydrilla sp are dried out using tissue paper / clothand weight using a weighing machine /balance.The mass / height of plants are recorded

This obervation was caried out for 6 weeksAll the readings of mass are tabulated in a table and theaverage reading

are calculated

(P1)

(P2)

(P1)

(P1)

(P1)

(P3)

(P1)

(P5)

(P4)

(P2)

(P4)

lffi

62

ilAfFA IZTAH Biotogr paper3 Exceltscore

Exercise 4tft

fA"r*A\

I sconrxc I

I cnlrsnn I

lo*lr;-I-71I pz | "r Ilpsl.rlt-------+------..1I p+ I ^r It___F__-lpsl.rl

scoRE 04(./)

ffi

II Manipulated Variable I -- I

j

PROCEDURE CRITERIAJr- rnreeplannngtray.

52- The trays are k53- 30 numbers ofr

intervals,30 nuand 30 numbenshown below (r

trays are prepared and filled with 3 kg ofgarden soil in each

rbeled as A, B and C with waterproof paint .

naize seeds are planted in tray A at a distance of I 0 cmmbers ofmaize seeds in tray B at a distance of 5 cm intervalsi ofmaize seeds in tray C at a distance of 2 cm intervals asrot in correct scale) .

fTtA

1-10cm- 7 .t

Y? T T

I | ;--_-llrscrt ' ll ,l!' I

l; ',', llru ll"u' ll . I

54- Each tray is w55- After 10 days,

root ofseedlin56- Theheightofr

average heighrby usingfom

The growth ra= the averaqe

tin57- Step 5-6 are re1

and the growthseparately.S8- The result ate

$ered daily with the same amount of water for l0 davsl0 maize seedlings are picked randomly from ray Aind thegs are washed under running waternaize seedlings are then measured by using mebe rule. Theare calculated

ula = the total heisht ofseedlinss/cml0

;e is calculated by using formulaheisht ofseedlineVcmte taken / daypated^for seedlings from hay B and C. The average heightrate ofseedlings intray B and C are measured anJcalcu-laled

recorded in a table.

63

HAFFA I?ZAH Biotogy pap€r3 Exc€[S{ore

* ExergiseS

. Form 5l Chapter3_Coordination {Urin}

I Answer (L_+ \I sconrxc I

I cnrrrnn I

lonlf'' f'llezl.rllegl"rllP{l ^rllpsl"rl

scoRE 04(./)

ffi

A student i(Sample A) is chosen and instructed to empty hisbladders before the siart of the "-p"r*;;i-'--

(v sr I rPr

JVleasure 200m1 of water ano put it into ihe mugA student(sampre A) is given 2oorr ot rin.i.ilorinking water todrinkA stop watch is started immediately after consuming the water.oy.rinq

!n9 gxoerimenr, he is kept in i;"y ilil;ii;ir" r.oorlwrthin* 1-2 hours(any suitabte tiln" ,"njlj - --

He is instructed not to eat or perform jny vigorous physicalactivities(within the given time).After half an hour, he is asked to empty his bladder.The collected urine is kept in a large b""1", ----"At the interval of half an hour, until two hours , a student willempty his btadder.After two hours, the total collected urine is measured usingmeasuring cylinderR^epeat step 2 - 9 for difierent amount of drinking water ( 400 ml,600m1, 800mt, 1000mt)" Accept four readings and moreSjep 7 is conduc*ed for four consecutive days in a fixed time andplaceDjspose the measured urine properlyMeasure and record Oata collectlU iito a table/Plot a graph of urine outpui against the *"t"iint"t" is plotted.

K1

K3KI

K1K2

K5

K2K1K4

KzIK4

KIIKs

64