Skema Pemarkahan Trial Pmr Sbp 2009 Science

BAHAGIAN PENGURUSAN SEKOLAH BERASRAMA PENUH DAN SEKOLAH KLUSTER KEMENTERIAN PELAJARAN MALAYSIA

PEPERIKSAAN PERCUBAAN PMR 2009

SKEMA PEMARKAHAN

SAINS (KERTAS 1 & KERTAS 2) 55/1 & 55/2

SCIENCE PMR (SBP) PERCUBAAN PENILAIAN MENENGAH RENDAH 2009

SKEMA JAWAPAN KERTAS 1 BIL

KONSTRUK

ARAS

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

PSNR010103 PSNR010201 PSNR010201 KSNR010501 KSNR010401 PSNR010102 KSNR010401 KSNR010201 KSNR010401 PSNR010202 PSNR010202 KSNR010201 PSNR010301 PSNR010301 PSNR010203 PSNR010201 KSNR010101 KSNR010401 PSNR010102 KSNR010501 KSNR010201 PSNR010101 PSNR010102 PSNR010102 KSNR010501 KSNR010501 KSNR010401 KSNR010501 KSNR020101 KSNR020101 KSNR010401 KSNR020101 PSNR010102 PSNR010102 KSNR010101 KSNR010201 PSNR010102 KSNR010101 PSNR010102 PSNR010101

R S R T S S S T S S S S R R R S T S S S S R R R S S S S T S S T R R T T R S R R

JAWAPAN A B D C B B B C C A A C B C B D D D D A C C D D D C D D C B C B C A B B A A D D

STIMULUS DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM TABLE DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM

DIAGRAM GRAPH

DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM DIAGRAM

SKEMA JAWAPAN KERTAS 2 QUESTIONS 1

(a)

(i)

(ii)

RUBRIC

MARKS

J : Filter funnel K: Measuring cylinder L : Evaporating dish * Spelling must be correct

1 1 1

Measuring cylinder / K

1

(b)



To support apparatus during heating



To measure temperature



To conduct the excess heat away



To measure time

3 1

1

2

1

TOTAL 2

(a) (b)

(i)

(ii) (c) (d)

(i)

(ii)

6

Help people to plan a (healthy) balance diet

1

- (Needed) for growth // - Repair body tissues // -(Required) for the formation of enzymes/ hormones/ antibodies/ haemoglobin Any suitable answer

1

Kwashiorkor * Spelling must be correct

1

Fat // Carbohydrate

1

- Drop iodine solution on the food sample, it will turn to blue black/ dark blue// - Turns iodine solution to blue black/ dark blue

1

Glucose

1

2

(a)

(b)

6

(i)

Sunlight

1

(ii)

Light energy changes to chemicals energy / light energy chemical energy

1

(i)

Biological control

1

(ii)

- Does not pollute air (environment) // - Does not kill other organisms except pests // - Cheap / affordable

1

*Accept any suitable answer

1 2

TOTAL 3

1

1 1 1

1

(c)

(i)

1 Owl Mouse

1

Oil palm tree

(ii)

Snakes / Cats *Accept any suitable answer.

1 TOTAL

4

1 6

(a)

Siphon

1

1

(b)

To transfer water (liquid) from a high level to a lower level

1

1

(c)

2

2

(d)

No. - The air pressure in the rubber tube will prevent the water from flowing // - The air pressure in the rubber tube is the same as the atmospheric pressure

1 1 2

TOTAL 5

(a)

(i)

It will wilt / droop / unable to remain firm / unable to stay upright

1

(ii)

It will be firm and remain/ stay upright / look fresh/ not droop

1

(iii)

-

1

-

(b)

6

Balsam plant needs water to stand upright // Turgidity of the balsam plant depends on the presence of water The balsam plant can stay upright because there is support by turgidity of water

3

(iv)

The turgidity of cells / cell turgidity

1

1

(i)

In situation A aquatic plant cannot stand upright on its own whereas in situation B the aquatic plant stand upright

1

3

(ii)

-

1

Aquatic plant needs water in order to stand upright The aquatic plant can stand upright because there is support from water (buoyancy)

(iii) (c)

Buoyant force of water / buoyancy of water

1

To support its/ the plants body weight

1 TOTAL

6

(a)

(b)

Purple to/  colourless/ The purple colour of acidified potassium manganate (VII) solution is bleached

1

(ii)

Acidified potassium dichromate (VI) solution

1

(iii)

Plumbum oxide

1

(i) (ii)

Plumbum Sulphur

1 1 heat

Plumbum sulphide + Oxygen

(d)

8

(i)

(c)

3

(a)

2

2 Plumbum oxide + sulphur dioxide

2

All 3 answers are correct – 2 marks Any 2 answers are correct – 1 mark

Zinc sulphide (Blende) // Magnesium sulphide // Iron Sulphide (Pyrite) // Copper sulphide (Chalcocite) *Accept any suitable answer.

1 1

TOTAL 7

1

Organism Amoeba Frog Housefly Starfish

Way of Reproduction Asexual (reproduction) // Binary fission Sexual (reproduction) Sexual (reproduction) Asexual (reproduction) // Regeneration

*Accept any 3 correct answers

8 1 1 1 1

3

(b) P, Q, R and S

Sexual reproduction / Reproduce sexually //

Asexual reproduction/ Not reproduce Common characteristics sexually/ Reproduce asexually //

Reproduce by binary fission //

Not reproduce by binary fission //

Reproduce by regeneration

Not reproduce by regeneration

Frog, Housefly/ fly //

Amoeba, Starfish//

Amoeba //

Name of organisms

Starfish

4

Frog, Housefly/ fly, Starfish // Frog, Housefly/ fly, Amoeba

*Accept any suitable answer

(c)

(i)

Germination of seeds depends on the presence of water and air/ oxygen

1

(ii)

J / Test tube with wet cotton wool

1

(iii)

The seed will germinate with the presence of water and air/ oxygen/ The seeds need water and air /oxygen to germinate

1

TOTAL 8

(a)

(b)

3

10

The brightness of the bulbs depends on the number of bulbs (arranged in the circuit) // Bulbs in circuit P are brighter because there are less number of bulbs (compare to circuit Q) // (vice versa) The more bulbs (arranged in the circuit), the less brighter the bulb (vice versa)

1

(i)

0.7 // 0.70

1

1

(ii)

Refer to the Appendix 1

2

2

1

(iii)

The longer the length of nichrome wire, the lower the current // (vice versa)

1

1

(iv)

Length of nichrome wire

1

1

(v)

0.65A (unit is compulsory)

1

1

(vi)

Current is the reading of the ammeter / ammeter reading

1

1

1 1

2

(vii)

-

Correct symbols drawn – 1m Correct connection of circuit – 1m TOTAL

10

APPENDIX for Question 8 (c)

X X

0.8

X X

Current (A)

0.6

0.4

0.2

10

20

30

Length of nichrome wire (cm) -

All four points are correctly transferred – 1m A straight smooth line joining all the points – 1m

END OF MARKING SCHEME

40

50