8/14/2019 Percubaan PMR Perak 2008 - Science Paper 2 (Ans)

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Section[40marks]

Answer ll questions.

(a)

(b)

[ 3 marks][3 markah]

[2 marks][2 markah]I I mark]I rnarkah]

I mark]I I markahJI I mark]I I markahJ

Ampl i f iessoundwavesMenguatkan gelombang bunyi

(c) Microphone loudhailer earphone stethoscope/ioudspeaker

(a ) Lungs

To pumpblood o thewholebody

Semicircular anal1l))Salur separa bulat Cochlea(QKoklea Earossicles{{)Osikel elinga

Controf the balance f the bodyMengawal ke,sembangan badanConvertsound ibrat ion o nerve mpulsesMenukarkan getaran bunyi kepada impul.s araf

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(b) aaaaaaa

AaaaaaI

(c )

[2marks][2 markahJ

P: The lumen s large/hasalve/lessmuscular nd ess last icrblood nder owpressure/deoxygenatedloodQ:The umen s very smal l /no valves/nonmuscular/oneel l thick/bloodunder erylittle pressure/deoxygenatednd oxygenated loodi I I mark]

[ 1 markah]To supplymoreoxygen o th e tissues/ he bloodcarriesmore oxygen [1 mark]

I I markah]X : condensat ion Y : Boi l ing [2 marks]

[2 markah](b \ i. Colourless/ tasteless/ odourless/boilingpointat l000cllmelting oint at00Cllhas density

of I g/cm3 l abadlpoorconductor f heatllbad/poor onductor f electricity I mark]pmarkahJboil ingpointhigher than l00oC) I mark]

flmarkahJ

(d)

(c) ProcessProsesZ

Il marks]f markahJ[2 marks][2 markah

Whole body(excep tlungs)Se lu ruhb a d a n( k e c u a l ipeparu )

8ECO

@ Heat s absorbed

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(a) i . Secondl 2 ( class ever)

i i. The load s between he fulcrum an d heeffortlthe loadand effort actdirect ion.

Q needs esseffort hanP to pul l out the nai l

30kgxX:25kgx l .2 rn .30X: 30X: l n t .

f ) i : rgr - : rnr ( i -J( R: r j : rh 6-J )

( d )

(b)

(c.)

(b )

( c )

I I mark]I I markahJin oppositeI mark]I I markahJI mark]p markahJ

[2 marks][2 markahJ

[2 marks][2 markahJI I mark]I I markahJ

(a )Mouth Oesophagus l-1I stomach| *

l l5 correct 2m, 3 correct

Q wil l contract nd elax

i.CarbohydratesGlucoseKarbohidrat

l m

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i i . ProteinsProtini i i .FatsLemak

: Amino acid: Glycerol and Fattyacid

(a)

Visking ubeTheenzymen salivaunctions est t body emperature

i .P

ii . CanP loses eat asterhancanQ

[3marks][3 markahJ

[1mark]I I markahJI I mark]I I markahJ

I I mark]I I markahJ

[1 mark]fl markahJ[1 mark]

I I markahJ[1 mark]

fl markahJlonger)I mark]

fl marknhJ

I mark]p markah]

(b ) i. The blacksurface/ P

i i . Lower han5 50C lmore heat adiate

(c) The transmissionradiat ion f heat, so th e hot drink u'i l l rentain varm

Convectionof heat/hot ir in the overr ( so he cakewill cook faster)

(d) Black colour radiateheatbetter than white / shinv colour

(a) (i) Paramecium/aramesium Binary ussion(ii) Chlamydomonas/lamidomonasBinary ussion(iii) StarfishiTapakulaiman:Regeneration(iv) HydralHidro Budding

[1 mark][I markahJ

[ 4 marks][4 markahJ

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(b)

Commoncharacterist icCiri Sepunya

Name of theorganismslYama organisma

Chlamydomcnas/Paramecium/HydraHydra.star ish.Param cium/Chlamydomonas,Hydra,Starfi sh/Chlar,rydomonas,Paramecium.tar ish

(a) 36 sec saat /

[4 marks]14narkahJ

I marklI I markah]

13marksl[3 markohJ

(b)

Ch arnydomonas,aramecum.H1,dra, tarfishAmeba, Lintah bulan, Hidra, Tapak

Suktiman

Hasflagellum/hascilium/hastentaclesDoesnothaveflagellum/Doesnothavecilium/Does othave entacles

Time akenMasa yangriiombil l l r8 30 36 47

( i ) Manipulated ariablesPembo ehubah d manupula,s

Volume of the conlainer

(i i) RespondingariablesPembo ehubah be ge akbalas

How long a candle burn.s time taken

( i i i ) Fixedvar iablesP embo ehubah d mal arkan

Size of cctndle type of candle

(c) The bigger lhe container, the longer the burning time of a candle.

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(d)

Timetaken

50

40 0 600 800 1000 1200

I mark]fl ntarkahJ

[3 marks][3 markahjto burn also

12marksl[2 markahJ

[2 mark][2 markahJ

40

30 120

100

Volume f glass ontainer(e) 33sec.As thevolumeof thecontainer ncreases,he ime aken-for he candleincreases

The time takenfor the candle to burn decredsesExhaled air contains more carbon dioxide / less oxygen(fl