PEPERIKSAAN PERCUBAAN PMR 2009

SKEMA PEMARKAHAN SAINS

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

BAHAGIAN PENGURUSAN SEKOLAH BERASRAMA PENUH DAN SEKOLAH KLUSTER KEMENTERIAN PELAJARAN MALAYSIA

SCIENCE PMR (SBP)

PERCUBAAN PENILAIAN MENENGAH RENDAH 2009

SKEMA JAWAPAN KERTAS 1

BIL KONSTRUK ARAS JAWAPAN STIMULUS 1 PSNR010103 R A DIAGRAM 2 PSNR010201 S B DIAGRAM 3 PSNR010201 R D DIAGRAM 4 KSNR010501 T C DIAGRAM 5 KSNR010401 S B DIAGRAM 6 PSNR010102 S B 7 KSNR010401 S B DIAGRAM 8 KSNR010201 T C DIAGRAM 9 KSNR010401 S C TABLE

10 PSNR010202 S A DIAGRAM 11 PSNR010202 S A DIAGRAM 12 KSNR010201 S C DIAGRAM 13 PSNR010301 R B DIAGRAM 14 PSNR010301 R C DIAGRAM 15 PSNR010203 R B 16 PSNR010201 S D DIAGRAM 17 KSNR010101 T D DIAGRAM 18 KSNR010401 S D 19 PSNR010102 S D 20 KSNR010501 S A DIAGRAM 21 KSNR010201 S C GRAPH 22 PSNR010101 R C 23 PSNR010102 R D 24 PSNR010102 R D 25 KSNR010501 S D 26 KSNR010501 S C DIAGRAM 27 KSNR010401 S D DIAGRAM 28 KSNR010501 S D DIAGRAM 29 KSNR020101 T C DIAGRAM 30 KSNR020101 S B DIAGRAM 31 KSNR010401 S C DIAGRAM 32 KSNR020101 T B DIAGRAM 33 PSNR010102 R C DIAGRAM 34 PSNR010102 R A DIAGRAM 35 KSNR010101 T B DIAGRAM 36 KSNR010201 T B DIAGRAM 37 PSNR010102 R A 38 KSNR010101 S A DIAGRAM 39 PSNR010102 R D 40 PSNR010101 R D DIAGRAM

SKEMA JAWAPAN KERTAS 2

QUESTIONS RUBRIC MARKS

1 (a) (i) J : Filter funnel K: Measuring cylinder L : Evaporating dish * Spelling must be correct

1 1 1 3

(ii) Measuring cylinder / K 1 1 (b)

1

1

2

TOTAL 6 2 (a) Help people to plan a (healthy) balance diet 1 1 (b) (i) - (Needed) for growth //

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

1

(ii) Kwashiorkor * Spelling must be correct 1

2

(c) Fat // Carbohydrate 1 1 (d) (i) - Drop iodine solution on the food sample, it will turn to

blue black/ dark blue// - Turns iodine solution to blue black/ dark blue

1

(ii) Glucose 1

2

TOTAL 6 3 (a) (i) Sunlight 1 1 (ii) Light energy changes to chemicals energy /

light energy chemical energy 1 1

(b) (i) Biological control 1 1 (ii) - Does not pollute air (environment) //

- Does not kill other organisms except pests // - Cheap / affordable *Accept any suitable answer

1

1

To support apparatus during heating To measure temperature

To conduct the excess heat away

To measure time

(c) (i)

1

1

(ii) Snakes / Cats *Accept any suitable answer.

1 1

TOTAL 6 4 (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 6 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) - 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

1 3

(iv) The turgidity of cells / cell turgidity 1 1 (b) (i) In situation A aquatic plant cannot stand upright on its own

whereas in situation B the aquatic plant stand upright 1

(ii) - Aquatic plant needs water in order to stand upright - The aquatic plant can stand upright because there is

support from water (buoyancy)

1

3

Owl

Mouse

Oil palm tree

(iii) Buoyant force of water / buoyancy of water 1 (c) To support its/ the plants body weight 1 1 TOTAL 8

6 (a) (i) 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

3

(b) (i) (ii)

Plumbum Sulphur

1 1 2

(c) heat Plumbum sulphide + Oxygen Plumbum oxide + sulphur dioxide - All 3 answers are correct – 2 marks - Any 2 answers are correct – 1 mark

2

2

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

1 1

TOTAL 8

7 (a)

*Accept any 3 correct answers

Organism Way of Reproduction Amoeba Asexual (reproduction) //

Binary fission Frog Sexual (reproduction) Housefly Sexual (reproduction) Starfish Asexual (reproduction) //

Regeneration

1

1 1 1

3

(b)

*Accept any suitable answer

4

(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

3

TOTAL 10

8 (a) 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

1

(b) (i) 0.7 // 0.70 1 1

(ii) Refer to the Appendix 1 2 2

P, Q, R and S

Asexual reproduction/ Not reproduce sexually/ Reproduce asexually // Not reproduce by binary fission // Not reproduce by regeneration

Sexual reproduction / Reproduce sexually // Reproduce by binary fission // Reproduce by regeneration

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

Frog, Housefly/ fly // Amoeba // Starfish

Common characteristics

Name of

organisms

(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

(vii)

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

1 1

2

TOTAL 10

APPENDIX for Question 8 (c)

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

END OF MARKING SCHEME

Cur

rent

(A)

0.8

0.6

0.4

0.2

Length of nichrome wire (cm)

10 20 30 40 50

X X

X X