papercollection.files.wordpress.com · jabatan pelajaran negeri perak marking scheme – science...

www.myschoolchildren.commore exam papers at :

www.papercollection.wordpress.com

SKEMA JAWAPAN

SAINS KERTAS 1

PERCUBAAN PMR NEGERI PERAK

No Jawapan No Jawapan

1 B 21 D

2 D 22 B

3 A 23 D

4 D 24 C

5 B 25 A

6 A 26 C

7 C 27 A

8 B 28 D

9 A 29 B

10 B 30 A

11 C 31 D

12 B 32 C

13 C 33 C

14 C 34 D

15 D 35 B

16 B 36 B

17 A 37 B

18 D 38 C

19 D 39 B

20 A 40 A

JABATAN PELAJARAN NEGERI PERAK

MARKING SCHEME –

SCIENCE PMR TRIAL PAPER 2 2011

Marking scheme

(a) P = Skeletal system Q = Respiratory system R = Digestive system (b)

System Function

Excretory Produce new offspring

Reproductive Digest and absorb food

Digestive Removing waste

1 1 1 3

Total: 6m

(a) Cell wall (b)

Thorn Bougainville / Rose / Rattan

Tendrils Cucumber / Pumpkin / Morning glory

Breathing root Mangrove

3 correct 2m 2 correct 1m 1 correct 0m

(c) (i) Provide buoyancy // Enable the plant to float / Upright (ii) Lotus / Water hyacinth / Water lily / (iii) Pond / Lake / River (Accept for water hyacinth only) Reject: pool / Water / well / sea

1 2 1 1 1

Total 6m

(a) (i) Temperature (ii) Salt Y (iii) accept 40º Celcius – 45 º Celcius (b) Increase the volume of water // Stir I (i) Use alcohol / Turpentine / Thinner / petrol / Kerosene /

1 1 1 1 1

Organic solvent (ii) Solvent for paint // Paint can dissolve in the solvent

Total 6 m

4 correct 2m 3 to 2 correct 1m

1 correct 0m (b) (i) Kidney (ii) Y has higher urea content/waste product/mineral salt // Y has high urea /mineral salt content than X (c) F – Glucose/sugar is present in urine // Urine contains glucose / sugar E - The student has diabetes mellitus. ( F- fact, E-explaination)

2 1 1 1 1

Total 6 m

(a) (i) Diagram contains right direction of arrow No over lapping lines (ii) Able to label X in the diagram (b) Using compass (c) (i) At least 1 arrow with correct direction (ii) Right-hand grip rule (d) (i) Y has more concentric circle than X (ii) Using greater current / Using more dry cells

1 1 1 1 1 1 1

P R Q S

(iii) By changing the direction of the current

Total 8m

6 (a) P – Stereoscopic Q - Monocular (b)

Note: 2 correct field of vision = 2 m 1 correct vision field = 0 m (c) P – Can judge distance accurately // Produce a three-dimensional image // Has overlapping field of vision Q – Has bigger field of vision

1 1 2 1 1 1 1

Total 8m

Reject: Can look behind (d) P – Able to hunt for prey efficiently Q – Help them to look all around for food // To escape from predator

(a) (i)

Metals Reading of stop watch (s)

(ii) P is a better heat conductor than R // R is a poor heat conductor than P (iii) If the metal is a good heat conductor, the less time taken for cobalt chloride paper turns blue. (b)

Constant variable Distance from heat source /

Volume of hot water

Responding variable

Heat conductivity// reading of stopwatch //time taken for cobalt chloride paper turns

blue (c) (i) Aluminium is an electrical conductor because the ammeter shows a reading // Sulphur is a poor electrical conductor because the reading of the ammeter is smaller (ii) More than 3 but greater than 0.5

2 1 1 2 1 1 1

Step-up transformer

Transformer injak-naik

Step-down transformer Transformer injak-turun

Q, R, S

(b) (i) Bulb B is brighter than Bulb A // Bulb A is dimmer than Bulb B

(b) (ii) The number of turns of wire are more than 5 turns (b) (iii) Bulb B is brighter because it has higher number of turns of wire (c) 12 (d)

Responding variable Output voltage / Reading of the

voltmeter

Manipulated variable Number of turns of wire of

secondary coil

(e) (i)

Note: All points plotted correctly = 1 mark Straight line = 1 mark (e) (ii) The higher the number of turn of wire of secondary coil, the higher the output voltage (f) The output voltage is the reading of the voltmeter (depends on the number of turns of wire of secondary coil

1 1 1 2

Total 12m

End of the marking scheme

papercollection.files.wordpress.com · jabatan pelajaran negeri perak marking scheme – science...

Documents