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P5/6 science

Name Class Date

Primary 5/6

sCieNCeeND-of-YeAR AssessMeNT (seT 1)

iNsTRUCTioNs

Total time for Booklet A and Booklet B: 1 h 45 min

BooKLeT A

MCQ [60 marks]Answer ALL questions.

BooKLeT B

oPeN-eNDeD [40 marks]Answer ALL questions.

BooKLeT MARKs

A

B

/ 60

/ 40

/ 100ToTAL

SAPSCSP5&6_EY1Page �/19


P5/6 science

BOOKLET A: MCQ

Answer ALL questions. [60 marks]

1. Themodelbelowshowsthehumanrespiratorysystem.

Before After

A

B

A

B

C

Basedontheobservationsmadeofthemodelabove,whichofthefollowinginferencesis/aretrue? A. TheexchangeofgasestakesplaceinB. B. At‘Before’,airhasbeenreleasedfromB. C. At‘After’,airisreleasedfromBwhenCispulleddownwards. D. AiratAin‘Before’hasmoremoisturethanairatAin‘After’. (1) Aonly (2) AandBonly (3) AandConly (4) A,BandDonly ()

2. Whichpairoflivingorganismsisclassifiedincorrectly?

Breathing methods

Gills Airbubbles Breathingtubes Moistskin

dragonflynymph waterstickinsect backswimmer flatworm

mudskipper greatdivingbeetle waterscorpion tubifexworms

(1) dragonflynymphandwaterscorpion (2) waterstickinsectandbackswimmer (3) tubifexwormsandgreatdivingbeetle (4) waterstickinsectandmudskipper ()

Taken from Nail Those MCQs! PriMary sCieNCe uPPer BloCk 5/6



P5/6 science

Study the experiment shown below. Then answer questions 3 and 4.

Set-up 1

Set-up 2

livecockroach

oxygenpumpedin

oxygenpumpedin

limewater

limewater

deliverytube

deliverytube

stopper

stopper

3. After some time, the limewater inSet-up1 turns chalky.Whatprocesshasoccurredduring that

period? (1) respiration (3) digestion (2) photosynthesis (4) decomposition ()

4. WhatisthepurposeofhavingSet-up2intheexperiment? (1) Toshowthatthelimewaterturnschalkywhenitreactswiththegasgivenoutbythecockroach (2) Toshowthatlimewaterremainsclearinthepresenceofthecockroach (3) Toshowthatlimewaterturnschalkyinthepresenceofthecockroach (4) Toshowthatlimewaterremainsclearwhenitreactswiththegasgivenoutbythecockroach ()

5. Thediagramsbelowshowfourdifferentcircuits.Ineachcircuit,similarbatteriesandbulbsofthesamevoltageareused.Whentheelectriccircuitsareconnected,allthebulbslightup.

A B C

WhichofthefollowingrowsshowsthebrightnessofbulbsA,BandC?

Degree of brightness of bulbs

Bright Brighter Brightest

(1) C B A

(2) A B C

(3) A C B

(4) B C A

()




P5/6 science

6. Thediagrambelowshowsfourdifferentcircuitswithidenticalbulbsandbatteriesused.

CircuitW CircuitY

CircuitX CircuitZ

Inwhichcircuitwillthebulb(s)bethebrightest? (1) CircuitW (3) CircuitY (2) CircuitX (4) CircuitZ ()7. Thegraphbelowshowsthemonthlyconsumptionofelectricityforahouseholdovertwoconsecutive

months.Consumptionofelectricity(Kwh)

MonthsApril May

Basedontheinformationinthegraphabove,whatis/arethepossiblereason(s)fortheincreaseinconsumptionofelectricityinMay?

A. ThehouseholdhadtheairconditionerswitchedonforlongerhoursinthemonthofMay. B. Thehouseholdhadgoneona14-dayoverseastripinMay. C. Thehouseholdhadswitchedfromanold22-inchtelevisiontoanew42-inchtelevision. D. Thepart-timecleanerthatthehouseholdengagedmoppedthefloordailyinsteadofweeklyin

themonthofMay. (1) Aonly (3) AandConly (2) Bonly (4) A,CandDonly ()

8. Studytheelectricalcircuit.Allfourbulbsarelightedup.

S V

TU




P5/6 science

Darcywantstoinstallaswitchsothatheisabletoswitchoffabulbwhileleavingtherestofthebulbslighted.Whichpartofthecircuit,S,T,UorV,shouldDarcyinstalltheswitch?

(1) S (2) T (3) U (4) V ()

9. Thecircuitdiagrambelowshowsfourdifferentswitchesandsomewiresconnectingtoalightbulb,anelectricovenandaprinter.

S1S2

S3

S4

lightbulb

electricoven

printer

Whichoftheswitchesmustbeclosedinordertohavethefollowingenergyconversiontakeplace?

chemicalenergy→electricalenergy→kineticandsoundenergy

(1) S2only (2) S1andS2only (3) S1andS3only (4) S1,S2andS4only ()

10. Thediagrambelowshowsthefrontviewofthecircuitboard.

A C

D EB

frontview

Therearewiresconnectedbehindthecircuitboardwhichallowthebulbtolightup.Whicharethepossiblecircuitpoints?

(1) ABandBC (2) ADandBC (3) BEandCE (4) BDandDE ()




P5/6 science

11. Fouridenticalbowlswiththesameamountofwaterareleftonthetableforhalfaday.

280mlat75°C

280mlat40°C

280mlat10°C

280mlat95°C

C D E F

Whichbowl,C,D,EorF,willhavetheleastamountofwaterleft? (1) C (2) D (3) E (4) F ()

12. Devanmadeathermometerthatdidnothaveareadingscaleasshownbelow.

S T U

boilingwater

tapwater

chilledwater

WhatcouldhavebeenthelikelytemperaturereadingonThermometerT? (1) 100ºC (2) 55ºC (3) 25ºC (4) 10ºC ()

Study the diagrams shown below and answer questions 13 and 14.

waterdroplets

BottleA BottleBsealed sealed

Twosealedidenticalglassbottlesareleftonthetableforafewminutes.Waterdropletsarefoundonthebottlesasshownabove.

13. Basedonthediagramsabove,identifythebottleswithicedwaterandhotboilingwater.

Bottle A Bottle B(1) hotboilingwater icedwater(2) icedwater hotboilingwater(3) hotboilingwater hotboilingwater(4) icedwater icedwater ()




P5/6 science

14. Whatarethecorrectprocessesinvolvedinbothofthebottles?

Processes

Bottle A Bottle B

(1) Evaporationonly Condensationonly

(2) Condensationonly Evaporationonly

(3) Evaporationandcondensation Evaporationandcondensation

(4) Evaporationandcondensation Condensationonly()

15. Alexhastopushaheavyboxuptherampintothetruckasshownbelow.

boxramp

Whatis/aretheenergyconversion(s)thattake(s)placewhenAlexpushestheboxuptherampintothetruck?

(1) kineticenergy→gravitationalpotentialenergy (2) chemicalpotentialenergy→kineticenergy→gravitationalpotentialenergy (3) potentialenergy→kineticenergy→potentialenergy (4) chemicalpotentialenergy→gravitationalpotentialenergy ()

16. Studythetableshownbelowcarefully.

From the conversion of electrical energy

Group A Group B Group C Group D

tablelampspotlight

DVDplayertelevision

electricstoveelectrickettle

mixerblender

Inwhichgroupwouldyouputthetoaster? (1) GroupA (2) GroupB (3) GroupC (4) GroupD ()




P5/6 science

17. Thediagrambelowshowsasimplifiedversionofhowapowerstationisrun.Thedifferentformsofenergyusedtogenerateelectricityareindicatedbytheletters,A,B,CandD.

steamB

turbine generator

C D

Aboiler

sourcesofheat

WhichoneoffollowingcorrectlyshowsthedifferentformsofenergyatA,B,CandD?

Forms of energyA B C D

(1) heat kinetic heat electrical(2) heat heatandkinetic kinetic electrical(3) heat heat kinetic electrical(4) electrical heat electrical heat ()

18. Thediagrambelowshowsaboywatchingacartoononthetelevisionforfourhours.

Whichofthefollowingdescribebothusefulandnotusefulenergyproducedbythetelevision?

Useful energy Not useful energy(1) light soundandheat(2) lightandheat sound(3) soundandlight heat(4) heatandsound light ()

19. Whichoneofthefollowingstatementsaboutthesunisincorrect? (1) Thesunistheearth’smostimportantsourceofenergy. (2) Alllivingthingsdependdirectlyonthesunforenergy. (3) Thesunprovidesuswithlightandheatenergy. (4) Heatenergyfromthesunkeepsthewatercyclegoing. ()




P5/6 science

20. Whichofthefollowingaresourcesofpotentialenergy? A. naturalgas C. fossilfuel B. wind D. movingwater (1) AandBonly (3) A,CandDonly (2) AandConly (4) A,B,CandD ()

21. Whichofthefollowingstatementsaboutfossilfuelsis/arewrong? A. Fossilfuelscanbeburnttoproducesignificantamountofenergy. B. Fossilfuelstakethousandsofyearstoform. C. Coal,oilandwoodareexamplesoffossilfuels. D. Allfossilfuelsarenon-renewableresources. (1) Aonly (3) BandConly (2) Bonly (4) CandDonly ()

22. Thediagrambelowshowsavillagewhereapowerstationhasbeenbuilt.

agriculturalfarms

undergroundmining

powerstation

seajettyagriculturalfarms

If the power station uses only renewable sources of energy to generate electricity, which of thefollowingarelikelytobethesourcesforthestation?

A. cropsfromagriculturalfarms B. waterflowingtothesea C. coalfromtheundergroundmining D. lightfromthesun E. naturalgasfromneighbouringvillage (1) AandBonly (3) A,BandDonly (2) CandDonly (4) B,CandDonly ()

23. Whichofthefollowingstatementsis/arecorrect? A. Photosynthesisoccursonlyinthedaywhilerespirationoccursonlyatnight. B. Plantsneedchlorophyllinordertocarryoutphotosynthesisandrespiration. C. Plantstakeincarbondioxideduringphotosynthesisbutgiveoutthegasduringrespiration. D. Foodmadebytheleavesisstoredintheleavesonly. (1) Aonly (3) BandDonly (2) Conly (4) B,CandDonly ()




P5/6 science

24. Studythediagramshownbelowcarefully.

W

X oxygen food

Y

Z

withhelpofgreenpigment

absorbedbytheroots

produces

takenintakenin

produces

produces

producestakenin

photosynthesis

respiration

Whichofthefollowingbestrepresentletters,W,X,YandZ,correctly?

W X Y Z(1) chlorophyll oxygen starch energy(2) chlorophyll carbondioxide water glucose(3) sunlight oxygen starch glucose(4) sunlight carbondioxide water energy ()

25. The aim of the experiment shown below is to find out whether carbon dioxide is needed forphotosynthesis.

sealedglasscontainer

potofplant chemicaltoremovecarbondioxide

placedinthegardenunderdirectsunlight

Whichoneofthefollowingset-upsshouldbeusedasacontrolfortheaboveexperimentinordertomakeitafairone,assumingthattheplantsusedaresame?

(1) (3)

(2) (4)

()



chemicaltoremoveoxygen




sealedwoodencontainer



potofplant

placedindoors



P5/6 science

The diagram below shows how living organisms get their energy. Study it carefully and answer question 26.

Livingorganisms

Doesitdependonthesundirectly

forenergy?

Doesitbreakdowndeadmatter

forenergy?

Doesitfeedonplantsand

animals?

Doesithavesixlegs?

Canitbeseenwiththenakedeye?

Isitafern?

staghornfern

roseplant

oystermushroom

yeast

cockroach

mynah

Yes

Yes

Yes

Yes

No

No

No

Yes

Yes

No

Yes

No

26. Basedonthediagramabove,howandwheredoesthecockroachgetitsenergydirectlyfrom? (1) Itdependsonsunlighttosourceforfood. (2) Itfeedsonplantsandanimals. (3) Itbreaksdowndeadmattertoobtainenergy. (4) Itfeedsontheoystermushroomonly. ()

27. Aforcecanchangethe ofamovingthing. A. direction B. speed C. mass D. shape (1) AandBonly (3) BandDonly (2) AandConly (4) A,BandDonly ()

28. Thepicturebelowshowsafatherplayingwithhisdaughter.

father

daughter

rubberball

Thedaughterisrollingtherubberballtoherfatherwhograbsholdofitandrolls itbacktoher.Whichoneofthefollowingwillnottakeplace?

(1) Thevolumeoftherubberballisunchanged. (2) Theshapeoftherubberballischanged. (3) Thedirectionoftherubberballischanged. (4) Therubberballrollsbackatadifferentrate. ()


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P5/6 science

29. Whichoneofthefollowingisanexampleofapull? (1) Bouncingaball (2) Punchingthekeysonthekeyboard (3) Removingthelidfromthecontainer (4) Passingthebottleofketchuptosomeone ()

30. Eachstudentmadeastatementaboutforce. StudentA:Aforcecanchangetheshapeofanobject. StudentB:Aforceisharmfulwhenithelpsustocutupvegetables. StudentC:Aforcecanbeappliedtostopamovingobject. Whichstudent(s)madethecorrectstatement(s)? (1) StudentAonly (2) StudentConly (3) StudentsAandConly (4) StudentsA,BandC ()




P5/6 science

BOOKLET B: OpEn-EndEd

Answer ALL questions. [40 marks]

1. Lookatthetwofruitshownbelow.

A B

(a) HowarefruitAandBdispersed? [1m]

(b) Explainwhyeachofthefruitisdispersedinthewaymentionedin(a). [4m]

A:

B:

2. (a) Fillinthetablebelowtoexplainhowoilspillsaffectthelistedorganisms. [5m]

Effect of oil spills

On plants On animals On humans

Taken from sCieNCe ProCess skills uPPer BloCk 5/6



P5/6 science

(b) Givethreewaysofminimizingoravoidingthenegativeimpactofoilspillsaltogether. [3m]

•

•

•

3. The tablebelowshowsthemeltingandboilingpointsofseveralsubstances.Study the tableandanswerthequestionsthatfollow.

Substance Melting point / °C Boiling point / °C

A –25°C 50°C

B 0°C 100°C

C 2500°C 4200°C

D –10°C 5°C

E 10°C–15°C 120°C–130°C

F

Whichsubstance(s) (a) is/arealiquidatroomtemperature(25°C)? [1__2m]

(b) isagasatroomtemperature(25°C)? [1__2m]

(c) iswater? [1m]

(d) isametal? [1__2m]

(e) isnotapuresubstance? [1__2m]




P5/6 science

(f) SubstanceFisasolidatroomtemperature(25°C).SuggestapossiblemeltingpointandboilingpointforsubstanceF.Writeyouranswersinthetableabove. [1m]

4. Amodelofthehumanrespiratorysystemwasconstructedinthelaboratory.

Y-shapedglasstube

plasticine

transparentcontainerwithitsbaseremoved

balloon

rubbersheet

(a) Whichpartoftherespiratorysystemisrepresentedbythefollowingparts? [3m]

Y-shapedglasstube :

balloons :

rubbersheet :

(b) Thetransparentcontainerwithitsbaseremovedrepresentsthechestcavity.Inwhatwayisthisnotanaccuraterepresentationofthechestcavity? [2m]

5. Studythepicturesgiven.

arootcell

hair-likestructure

aleafcell




P5/6 science

(a) Whatisthefunctionofthehair-likestructureoftherootcell? [2m]

(b) Besidesthehair-likestructure,nameapartofthecellthattheleafcellhasbuttherootcelldoesnot. [1m]

6. Thediagrambelowshowsahydroelectricpowerstation.

movingwater

waterturbine

generator

(a) Statetheenergychangesthatoccurinahydroelectricpowerstationinthespacegivenbelow.[2m]

(b) Givetwoadvantagesofusingahydroelectricpowerstationtogenerateelectricity. [2m]

(c) Despitetheadvantagesofusinghydroelectricity,whydoyouthinkSingaporehasnotstartedtodoso,especiallysinceweareanislandsurroundedbywater? [2m]




P5/6 science

7. Lindaplantedthreepotsofbalsamplantswiththefollowingcharacteristicsasshowninthetablebelow.

Pot Number of seeds Type of soilA 10 gardenB 20 sandyC 20 garden

(a) IfLindawantstofindouttheeffectofovercrowdingonthegrowthofbalsamplants,whichtwoset-upshouldsheuseinherexperiment? [1m]

(b) MillyconductsanotherexperimentusingpotsBandC.Whatisshetryingtofindout? [1m]

(c) Nametwovariables(notmentionedintheabovetable)thatbothLindaandMillyhavetokeepconstanttoensurefairtestsfortheirexperiments. [2m]

8. FarmerJayownsanorganicfarm.Hedoesnotuseanychemicalpesticidesonhisvegetables.Heclaimsthathisproduceareallnatural.

(a) SuggesthowFarmerJaymightbeabletogetridofpestsonhisfarm. [1m]

(b) Suggesthowtheuseofchemicalpesticidesmayaffect

(i) thevegetablesplanted. [2m]

(ii) thesurroundingenvironment. [2m]




P5/6 science

Answers To EY1

Booklet A1. (4) 7. (3) 13. (1) 19. (2) 25. (3)2. (2) 8. (2) 14. (4) 20. (2) 26. (2)3. (1) 9. (3) 15. (2) 21. (3) 27. (4)4. (1) 10. (1) 16. (3) 22. (3) 28. (2)5. (1) 11. (4) 17. (2) 23. (2) 29. (3)6. (2) 12. (3) 18. (3) 24. (4) 30. (3)

Booklet B1. (a) Theyaredispersedbymanandanimals. (b) A:Thefruitisfleshyandedible.Theanimalwilleatthefruitandpassouttheindigestableseeds

tobedispersed. B: Thefruithashook-likestructureswhichcanhookontothefurofanimalsandbedispersed

whentheydropoffatanotherlocationthattheanimalgoesto.2. (a) Effect of oil spills

On plants On animals On humans• Underwaterplants

willnotbeabletoreceivesunlightforphotosynthesisbecausetheopaqueoilcoversthesurfaceofthewater.Theseplantswilleventuallydie.

• Marineanimalsmayswallowtheoilandgetpoisoned.

• Underwatercreatureswillnotbeabletoreceiveenoughoxygenbecausetheoilformsabarrieronthewatersurfacetopreventoxygenfromenteringthewater.Therearealsonoplantstophotosynthesizenowandgiveoutoxygen.Hence,theseanimalswillsuffocate.

• Birdsonthecoastwillhavetheirfeatherscoatedwithoil,makingthemtooheavyandunabletoflyofftolookforfood.Thestrandedbirdswillsoondie.

• Humansmayunknowinglybuyandeatseafoodthatiscontaminated.Theseseaanimalshaveswallowedoilandwhenhumanseatthem,theycansufferpoisoning.

• Humanswillnotbeabletogotothebeachorengageinwatersportsduetotheoilslick.Alotoftime,effortandmoneyisneededtocleanupthebeachandseaandrestorethemtotheiroriginalstates.

(Acceptanyotherreasonableanswers.) (b) • Oiltankersshouldbesailedbyexperiencedcaptainswhomustbeveryvigilantandcareful

toavoidcollisionsandaccidentswhichcouldleadtooilspills. • Oil tankers must undergo regular maintenance checks to ensure that they are in good

conditionanddonothaveleaksorfaultypartswhichmakethempronetoaccidents. • Governmentsshouldimposeharshpenaltiesonoilcompanieswhosetankerscauseoilspills

on their territories and make it mandatory for these companies to undertake a clean-upoperationimmediately.

(Acceptanyotherreasonableanswers.)



P5/6 science

3. (a) SubstancesAandBareliquidsatroomtemperature(25°C). (b) SubstanceDisagasatroomtemperature(25°C). (c) SubstanceBiswater. (d) SubstanceCisametal.(Ametalhasaveryhighmeltingandboilingpoint.) (e) SubstanceEisnotapuresubstance.(An impure substance does not have a fixed melting and boiling

point.) (f) Meltingpoint:(Acceptanytemperatureaboveroomtemperature.) Boilingpoint:(Acceptanytemperatureaboveroomtemperature,higherthanthemeltingpoint.)4. (a) Y-shapedglasstube:windpipe balloons:lungs rubbersheet:diaphragm (b) The actual chest cavity can expand during inhalation and contract during exhalation due to

themovementoftheribcage,unlikethewallsofthetransparentcontainerwhicharerigidandcannotmove.

5. (a) Thehair-likestructureoftherootcellhelpstoincreasetheexposedsurfaceareaofthecellsothatitcanabsorbmorewateranddissolvedmineralsaltsinthesoilfortheplant.

(b) Theleafcellhaschloroplasts.6. (a) gravitational

potentialenergyofwateronhigherground

electricalenergyproducedbygenerator

kineticenergyofrunningwater

kineticenergyofwaterturbineblades

(b) Itdoesnotrequiretheburningoffossilfuelswhichgiveoffpoisonousgasesresultinginthepollutionoftheenvironment.Unlikefossilfuels,waterisarenewableresourcewhichwillnotbedepletedintheprocessofsatisfyingman’sdemandforelectricity.

(c) Singaporehasnohighcliffswithnaturalwaterfallstoserveastheenergysourceforahydroelectricpowerstation.

7. (a) SheshouldusepotsAandC. (b) Sheistryingtofindoutwhetherthetypeofsoilusedwouldaffectthegrowthofplants. (c) Theamountofsunlightreceivedbytheplantsmustbethesame.(Toachievethis,putthepots

inthesamelocation.)/Theamountofwatergiventoeachpotofplantmustbethesame./Theamountofsoilineachpotmustbethesame.(Acceptanytworeasonableanswers.)

8. (a) Hemayintroducethenaturalpredatorsofthepeststofeedonthem. (b) (i) Chemical residuesmaybe left on thevegetables and theseartificial substancesmaybe

harmfultohumansconsumingthem. (ii) Aspesticidesgetaccumulated in thesoil, theymaygetwashed intonearbypondsand

riversduringsoilerosionandcausewaterpollution.

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