55-2 sains kertas 2

55/2 @Hak Cipta Jabatan Pelajaran Selangor SULIT

PROGRAM PENINGKATAN PRESTASI AKADEMIK (1)

SKEMA PEMARKAHAN

SAINS

(KERTAS 2)

55/2

Satu jam

TINGKATAN DUA

JABATAN PELAJARAN NEGERI SELANGOR


No. Answer Mark

1 a

b

c

X: liquid

Y: gas

Z: solid

Water

brittle

dull surface

3

1

2

Total 6

2 a

b

i. The ping-pong ball becomes spherical/round again ii. Air pressure inside the ping-pong ball is increase

i. The air particles move faster and collide more frequently ii.

1

1

1

1

c i. The gas cylinder will explode ii. Because the atmospheric pressure is lower than the inside the gas cylinder

1

1

Total 6

3 a P : cortex

Q : medulla

R : pelvis

1

1

1

b Tranfers / channels urine from kidneys to bladder

1

c

1

Total 6

4 a X : have nucleus/are regular in shape

Y : have no nucleus/biconcave disc-shaped

1

1

b kill bacteria/ fight infections and protect the body against deseases 1

c i) Aini ii) It will agglutinate

1

1

d Damage / cannot be used anymore 1

Total 6

Kidney Ureter Bladder Urethra


5 a

b

c

d

i) Asexual reproduction ii) 1. Only one parent is involved in asexual reproduction

2. Gamets are not involved in asexual reproduction

3. The process of fertilization does not occur in asexual reproduction

L: Regeneration

M: Binary fission

i. L:Regeneration

ii. M: Binary fission

i) L : Palanaria/ flatworms/ starfish ii) M : Paramecium/ Amoeba

1

1

2

2

2

Total 8

6 a Electrolysis of water

1

b

c

d

e

P: Oxygen

Q: Hydrogen

When a burning splinter is introduced into the test tube containing the gas Q, a pop sound is heard

(i) Combustion/ rusting (ii) Respiration/ decompose

40cm

1

1

1

1

1

2

Total 8

7 a (i) Potential energy (ii) Electrical energy (iii) Electrical energy (iv) Potential energy

4

b

Changes electrical energy to heat energy Electric iron and electric kettle Changes potential energy to kinetic energy - wound- up spring toy car, bow and arrow

4

Total 8

8

a i) The conditions for germination ii) Seed germination iii) The type of seed

3


b A seed will germinate only if there is water, air and warmth. 1

c

d

e

f

g

To prevent air from dissolving in the cooled boiled water

Seeds will germinate because seeds do not require light to germinate or light is not necessary

for germination of seed

i)

Days / Hari Length of radicle / Pemanjangan radikal (cm)

Day 1 0

Day 2 +_ 1.7

Day 3 +_ 2.7

ii) The length of radicle increases against time// a number of days

2.7

1.7

1

0 1 2 3

Growth means the increases in length of radicle against time // number of days

1

1

2

1

2

1

Total 12

END OF MARKING SCHEME

55-2 sains kertas 2

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