pmr trial 2012 sce (perak) q&a - trial paper collection · pdf filescheme of answers pmr...

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1

JABATAN PELAJARAN NEGERI PERAKPEPERIKSAAN PERCUBAAN PMR 2012

SUBJEK SAINS KERTAS 1

Nombor Jawapan 1 B 2 B 3 D 4 A 5 A 6 B 7 C 8 B 9 B

10 B 11 D 12 C 13 A 14 A 15 D 16 C 17 B 18 D 19 A 20 C

Nombor Jawapan 21 C 22 B 23 B 24 C 25 C 26 D 27 B 28 C 29 A 30 A 31 A 32 C 33 D 34 B 35 A 36 C 37 B 38 D 39 C 40 D


2


SCHEME OF ANSWERS PMR TRIAL EXAMINATION

SCIENCE PAPER 2

Question No.

Answers Marks

�1��

�a) X - lens Y - Vitreous humour Z - Optic nerve b)�

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3m��

3m��

Total�–�6m��

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�2

�a)

b)

c)

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3 a) b)4 c2-3

(c)

iron bloc Wooden b

4 corre 2 – 3 c

�

(I ) Produ (ii) Secon ( I )

correct-2 m 3 correct-1m

) Food cha

K�

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��X�

ck - sink block -flo

ect – 2m correct – 1m

ucer - K ndary consum

m

ain

��Z�

��A

oat

m

mer - M

N�

Air� W

M

��

��

L

M

N

K

��X

��W

��Y

Z

L�

Y

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2m

2m

2m

Total –�

2m

2m

1m

m

m

m

– 6m

m

m

m


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d) (Population) L decreases / N increases / K decreases 1m Total -6m

4 (a) (i) lime water turns chalky / cloudy / milky

Temperature in the gas jar increases / rises

(ii) Carbon dioxide

(b) (i) water

(ii)

�Anhydrous Cobalt chloride paper

Bicarbonate indicator

(c) Fuel for aircraft

1m

1m

1m

1m

1m

1m

Total – 6m

5 (a) ( i) To increase the voltage

( ii ) 240 V

(iii) X : Step –up Y : Step – down (b ) ( i) The number of turns of wire in secondary coil Q is higher ( than in primary coil/P)/ vice versa ( ii ) The output (voltage) is higher / The voltmeter reading increases (c) P1 - To reduce the voltage

P2 - To prevent the handphone from blows out/ damage / not function / burn/ explode Reject: Handphone can last longer

1m

1m

2m 1m

1m 1m

1m

Total – 8m 6 (a) (i) X - White blood cell

Y - red blood cell

(ii) X: To kill microorganisms./ body protection / fight against diseases / prevent from infection Y: Transport oxygen ( to the whole body) (iii) X has no nucleus, Y has nucleus / X has no fixed shape , Y has biconcave shape.

(b) ( i) Blood group O (ii ) Agglutination of blood will occur.

2m

2m

2m

1m 1m

Total – 8m


7 (a) (i) Clothes in condition A dried faster because the weather is hotter/temperature is Higher/ light intensity is higher Clothes in condition B dried slower because the humidity is higher/ temperature Is lower

(ii) The higher the temperature the faster the clothes dried // vice versa

(b) (i)

Set

Time taken for cobalt chloride paper to change colour(minute)

A 10 B 25

(ii) The time taken for cobalt chloride paper to change colour is shorter if the temperature is higher/ vice versa

(iii) The higher the surrounding temperature the higher the rate of evaporation

(c) Volume of water

(d) Hanging clothes and drying hair using hair dryer

1m

1m

2m

1m

1m

1m

2m��

Total- 9m �

8 (a) (i) X is more stable than Y

(ii) The bigger / wider the base area, the higher the stability / The lower the center of gravity, the higher the stability

(iii) X is more stable because X has bigger base area/ X is more stable because X has lower center of gravity/ Reject: height/taller/ shorter

(b) (i) 60

(ii) Graph 1mark – for correct points plotted 1 mark – for bar chart ( the same width and has space between graph) Reject: histogram

1m

1m

1m

1m


��

( c

(d)

(e)

� ��

) The longe

)

Control

Manipu

Respond

Stability o

��

K

er the length

lled variable

lated variabl

ding variable

of object is t

��

of stick the

B

le L

e M

the mass of w

��END�O

L

less stable th

ase area

ength of stic

Mass of weigh

weight (to top

OF�MARKING

M

he object is.//

ck

ht

pple the obje

G�SCHEME ��

N1

/ vice versa

ect)

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1m

��

2m

1m

3m

1m

Total-11


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