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7/30/2019 Peraturan Permarkahan Percubaan Pmr

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PERATURAN PERMARKAHAN PERCUBAAN PMR.

SAINS 55/2

QUESTION ANSWER SCHEME MARK

1 (a) Crab : Exoskeleton

Fish : Endoskeleton

Starfish : Hydrostatic Skeleton

1

1

1

(b) Because the whale get support by the buoyancy of the water

Ikan paus mendapat sokongan dari daya keapungan air

1

(c) i. maintain the shape of the body

ii. Protect the internal organ.

iii. enable body to move

Any 2

2

TOTAL 6

2(a) K :anther

L : style

M: filament

1

1

1

(b) 1

(c) i. Ovary

ii. zygote

1

1

TOTAL 6

3(a) i. The size remain unchangedii. Insoluble in wateriii. 1. Silicon

2. Oxygen.

1

1

1

1

(b) i. decompose to form lead oxide and sulphur dioxide

ii. Sulphur dioxide.

1

1

TOTAL 6

4(a) i. Lime water turns chalky/cloudy/milkyTemperature in the gas jar increases/ rises.

ii. Carbon dioxide1

1

1


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(b) i. water

ii.

Anhydrous cobalt chloride paper

Bicarbonate indicator.

1

1

(c) Fuel for aircraft 1

TOTAL 6

5(a) i.Parts of leaves

Bahagian daun

Conclusion/

kesimpulan

A Has starch

B No starch 2

(b) i. carbon dioxide

ii. water

iii.chlorophyll

REJECT : sunlight

Any 2

2

(c) Carbon dioxide

glucose

1

1

(d) i. supply food to animalsii. Remove carbon dioxide from atmosphere.

iii. Enable green plant to make photosynthesis.iv. Increased oxygen content.

Any 2

2

TOTAL 8

6.(a) i. Boiling tube P contains clean air, while boiling tube Qcontains polluted air.

ii. Take the rubber stopper off so that the cockroachescan have fresh air.

1

1

(b) i. P : smoke/ nitrogen dioxide/soot/sulphur dioxideQ: smoke/soot/carbon dioxide/carbon

monoxide/sulphur dioxide

R: smoke/soot/carbon dioxide/

ii. Destroy the plant.

Any 1pollutant.

1

(c) i. Wearing maskii. Avoid open burning 11

TOTAL 8


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7(a) i.Output voltage

J 14

L 8

ii. Transformer K is to increase output voltage but transformerL is to decrease output voltage.

iii. If the number of turns on secondary coil increases, theoutput voltage will increase.

iv. Output voltage is increase because number of turns onprimary coil is lower than secondary coil.

2

1

1

1

(b) Manipulated variable - number of turns on secondary coil.Responding variable output voltage.

2

(c) U= 15.9 V 1

(d)

Classification

Pengkelasan

Transfomer

Transfomer

Step-up transformer

Transformer injak naik

P

Step-down transformer

Transformer injak turun

R, S, Q

2

TOTAL 10

8(a) i. Filter paper in Set K is drier than filter paper in Set J.ii. Filter paper in Set K is drier because anhydrous calcium

chloride absorbs water from damp filter paper.

1

1

(c) i.Container

Bekas

Before

experiment(ml)

Sebelum

eksperimen (ml)

After

experiment

(ml)

Selepas

experiment

(ml)

Amount of

water loss

(ml)

Jumla h

kehilangan

air.

P 20 14 6

Q 20 18 2

R 20 16 4

2


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ii.

iii. The bigger the size of surface area, the higher the rate ofevaporation./ The size of surface area increase, the rate of

evaporation increase.

iv. Responding variable : amount of water lossControlled variable : volume of water (beginning of the

experiment.)

2

1

2

(d) The operational definition for rate of evaporation is the amountof water loss.

1

TOTAL 10Prepared by:

_________________________

(En Mohd Affendi Bin Mohd Fishal)

Guru Mata Pelajaran Sains Tingkatan 3

Checked By:

(Pn. Kelsom binti Taib )

Ketua Bidang Sains dan Matematik SMKTNJ

Varified by:

__________________

(En. Mohd Nasir bin Mohd Noor )

Penolong Kanan Kurikulum SMKTNJ

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