44. j*k
Sains
Kertas 1 & 2
Peraturan
Pemarkahan
PERSIDANGAN KEBANGSAAN PENGETUA-PENGETUA
SEKOLAH MENENGAH
NEGERI KEDAH DARUL AMAN
PEPERIKSAAN PERCUBAAN SPM 2010
SAINS
Kertas 1 & 2
PERATURAN PEMARKAHAN
UNTUK KEGUNAAN PEMERIKSA SAHAJA
AMARAN
Peraturan pemarkahan ini SULIT dan Hak Cipta Jabatan Pelajaran
Negeri Kedah. Kegunaan khusus untuk pemeriksa yang berkenaan sahaja.
Sebarang maklumat dalam peraturan pemarkahan ini tidak boleh dimaklumkan
kepada sesiapa. Peraturan pemarkahan ini tidak boleh dikeluarkan dalam apa
jua bentuk penulisan dan percetakan.
Peraturan pemarkahan ini mengandungi 12 halaman bercetak
45. j*k
2
1511/2(PP)
MARKING SCHEME ( PAPER 1 )
QUESTION NO ANSWER QUESTION NO ANSWER
1 B 26 A
2 D 27 B
3 D 28 A
4 C 29 B
5 A 30 A
6 B 31 D
7 B 32 C
8 C 33 C
9 A 34 D
10 A 35 B
11 D 36 D
12 C 37 A
13 D 38 C
14 D 39 C
15 D 40 A
16 A 41 B
17 C 42 D
18 A 43 A
19 B 44 A
20 A 45 A
21 B 46 D
22 C 47 A
23 C 48 D
24 B 49 D
25 D 50 B
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Marking Scheme Science SPM Trial Exam 2010
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3
MARKING SCHEME ( PAPER 2 )
Quest Marking Criteria Mark Σ
No Marks
1 SECTION A
(a) 0.4 1 1
(b) (i) Does not conduct electricity 1 1
(ii) Conduct electricity 1 1
(c) (i) Constant variable:
1. Number of dry cells 1 1
2. Voltage of dry cells
3. Type of electrode
(c) (ii) Responding variable:
1. Reading of ammeter 1 1
2. Electrical conductivity (of lead(11) bromide)
TOTAL 5
2 (a)(i) Observation:
1. The number of gas bubbles (released) in Diagram
2.2 is more than the gas bubbles (released) in
Diagram 2.1 1 1
2. (Volume of )gas collected in Diagram 2.2 is more
than the (volume of ) gas collected in Diagram
2.1
(a)(ii)
Metal X Metal Y
Logam X Logam Y
√ 1 1
(b)(i) Manipulated variable: Type of metal 1 1
(ii) Responding variable:
1. Reactivity of metal 1 1
2. Number of gas bubbles (released)
3. Volume of gas (collected)
(c) Operational definition:
1. Reactivity of metal is a process that cause a
volume of gas is released /collected (within five 1 1
minutes)
2. Reactivity of metal is the number of gas bubbles
released (by the metal when it reacts with
water)
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Marking Scheme Science SPM Trial Exam 2010
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4
Quest Marking Criteria Mark Σ Marks
No
2 3. Reactivity of metal is shown by the number of
gas bubbles (released when metal reacts with
water)
TOTAL 5
3 (a) ……… + 0.1 cm 1 1
(b)
X
image
2 2
Plane mirror
Cermin satah
Note:
Image drawn:
1. laterally inverted – 1 mark
2. parallel to object, same size and distance
from plane mirror should be equal to object
- 1 mark
(c) 1. virtual
2.same size (as object) 1 1
3.laterally inverted
4.upright
5.image distance and object distance from the
plane mirror are the same
Note: Any one characteristic 1 1
(d) 3.55
TOTAL 5
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Marking Scheme Science SPM Trial Exam 2010
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5
Quest Marking Criteria Mark Σ
No Marks
4 (a) Hypothesis:
1. As the time increases the number of mucor
colonies increases
2. If the time increases, so the number of mucor
colonies increases
3. The longer the time, the higher the number of
mucor colonies 1 1
4. As the time increases, the growth of mucor
increases
5. If the time increases, so the growth of mucor
increase.
Note: Any one
(b)
2 2
Note:
1. All points are transferred correctly – 1m
2. Smooth graph - 1m 1 1
(c) As the time increases the number of mucor
colonies increases 1 1
(d) 6
TOTAL 5
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Marking Scheme Science SPM Trial Exam 2010
49. j*k
6
Quest Marking Criteria Mark Σ
No Marks
5 SECTION B
(a) Distillation 1 1
(b) (i) liebig condenser 1 1
(ii)
1 1
Note : Any arrow accepted
(c) liquid 1 1
(d) 1. to break the air bubbles when the mixture is
boiling 1 1
2. to prevent the mixture in the flask from rising
and enters the branch of the condenser
(e) because ethanol and water have different 1 1
boiling point.
TOTAL 6
(a) P: Dry cell 1
Q: Lead-acid accumulator 1 2
(b) 1. portable/ transistor radio
2. torch light
3. clocks 1 1
4. shaver
(c) (i) 1. rechargeable
2. high voltage
3. use liquid as electrolyte 1 1
4. long lasting if maintained properly
(ii) sulphuric acid / acid 1 1
(d)
1 1
√ √ √
TOTAL 6
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Marking Scheme Science SPM Trial Exam 2010
50. j*k
7
Quest Marking Criteria Mark Σ Marks
No
7 (a) (i) tree /grass 1
(ii) deer 1
(iii) tiger 1 3
(b) tree/grass deer 1 1
(c) sun 1 1
(d) increase 1 1
TOTAL 6
8 (a) Fuel X: Liquid hydrogen 1
Fuel Y: Kerosene 1 2
(b)(i) Jet (plane) 1
(ii) Because oxyen (for the burning of the fuel) 1 2
is obtained from the surrounding air.
(c) 1 1
(d) Conservation of momentum 1 1
TOTAL 6
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Marking Scheme Science SPM Trial Exam 2010
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8
Quest Marking Criteria Mark Σ Marks
No
9 (a) (i) X 1
(ii) Y
1 2
(b)
Type of Characteristics of rubber
Rubber
• High ability to absorb
X ● sound
• Chemicals and oil
resistant
2 2
• Not easily flammable
Y● • Easily oxidised with
oxygen
Note:
1. One characteristic for Rubber X – 1 mark
2. One characteristic for Rubber Y - 1 mark
(c)
The Products Types of rubber
Produk Jenis Getah
1
Y// Synthetic
rubber
Industrial gloves
1 2
X//Natural
rubber
Rubber stopper
TOTAL 6
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Marking Scheme Science SPM Trial Exam 2010
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9
Quest Marking Criteria Mark Σ Marks
No
10 SECTION C
(a) Hypothesis
1. Plants need (complete) nutrients for healthy
growth
2. The healthy growth of plants need complete
nutrient 1 1
3. Plant needs complete culture solution for
healthy growth
4. Plant grows healthy in culture solution without
phosphorus/nitrogen.
5. Plant in complete culture solution has retarded
growth.
(b)(i) Aim of experiment:
To study the effect of nutrients on the growth of 1 1
plants
(ii) Variables
• Constant variable :
1. Volume of culture solution
2. Type of seedling 1
• Manipulated variable:
1. Type of culture solution
2. complete culture solution, culture solution 1
without nitrogen and culture solution
without phosphorus
• Responding variable:
1. Growth of plant/seedling 1
2. Number/colour/ size of leaf
3. Length/ size of roots Max
2
(iii) Apparatus and materials:
complete culture solution
culture solution without nitrogen 1 1
culture solution without phosphorus
three test tubes
plant/seedling
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Marking Scheme Science SPM Trial Exam 2010
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10
Quest Marking Criteria Mark Σ Marks
No
10 (iv) Procedure
seedling seedling seedling
Culture Culture
Complete solution solution
culture without without
solution nitrogen phosphorus
Note: Diagram pt 1 and pt 2
1. Put complete culture solution in test tube A 1
2. Put seedling/plant in test tube A. 1
3. Repeat step 1 and 2 by using culture solution 1
without nitrogen and culture solution without
phosphorus.
4. The apparatus are left for two weeks 1
5. The growth of seedling/ plant is observed (after
two weeks) 1 Max 4
Note:
If the student write:
1. Put:
(a) complete culture solution in test tube A
(b) culture solution without nitrogen in test tube B
(c) culture solution without phosphorus in test 1+1
tube C.
2. Put seedling/plant in each test tube 1
Student score 3 marks for point 1, 2 and 3.
(iv) Tabulation of data
Type of culture solution Growth of seedling/plant
Complete culture
solution 1 1
Culture solution without
nitrogen
Culture solution without
phosphorus
* Note:
1. Manipulated and Responding variable are written
on the title of table
2. Data for manipulated variable is written
3. Data for responding variable is left blank
4. Ignore any data Responding Variable written
TOTAL 10
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Marking Scheme Science SPM Trial Exam 2010
54. j*k
11
Quest Marking Criteria Mark Σ Marks
No
11(a) Characteristic alpha gamma
1. Nature Helium nucleus Electro-
magnetic 1
Radiation
2. Charge Positive Neutral 1
3. Speed Slow Speed of light 1
4. Penetration Low, can be Highest, can
power blocked by a only be
sheet of paper blocked by a 1
thick lead or a
thick concrete
5 Ionising effect Strong Lowest
1
6 Electrical field Deflect towards Does not Max
effect negative plate deflect 1 4
*Note : Any four differences
11(b) • Identify the problem:
Improper handling of radioactive substances can 1 1
cause harm to humans.
• Clarification of the problem:
1. Radiation from radioactive substances can destroy
living cells
2. Stop vital organs in the body from working 1 1
properly
3. Cause cancer
4. Cause mutation
5. Cause abnormality to foetus
Note :Any one
• Methods to solve the problem
1. Wear protective attire filled with lead 1
2. Wear film badge that can measure the degree of 1
exposure to radiation.
3. Use remote control equipment to move 1
radioactive substance
4. Have regular medical check-up to maintain good 1
health.
5. Radioactive substances need to be kept in 1
a thick lead box
6. Warning symbol of radioactive substance must be
displayed at places that store radioactive 1 Max 4
resource.
*Note : Any four methods
TOTAL 10
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Marking Scheme Science SPM Trial Exam 2010
55. j*k
12
Quest Marking Criteria Mark Σ Marks
No
12(a)
Mitosis Meiosis
Maintains the Halves the chromosomes 1
chromosome number number
Has one division cycle Has two division cycles 1
Produce two daughter Produce four daughter
nuclei nuclei 1
Does not involve Involving crossing over
crossing over and and independent 1
independent assortment assortment
Produces daughter Produce daughter nuclei
nuclei that are that are genetically
genetically identical to different from one 1
one another and to the another and from the
parent nucleus parent nucleus
Note : Any four comparison Max 4
12(b) • Common characteristic:
1. Characters are discrete/qualitative/ graded on a 1
scale
2. Characters cannot be measured 1
3. Determined by a single gene to distinct effect 1
4. Discrete distribution curve graph is obtained. 1 Max 2
5. Can be inherited
Note : Any two common characteristics
• Other example:
1. type of blood group 1
2. colour blindness 1
3. physical appearance 1 Max 1
Note : Any one relevant answer
• Two non-examples
1. weight 1
2. skin colour 1 Max 2
3. height 1
Note : Any two relevant answers
• Actual Concept
Discontinuous variation is a type of variation that has
characters which are discrete and determined by a 1 1
single gene with distinct effect.
TOTAL 10
END OF MARKING SCHEME
SKEMA PEMARKAHAN TAMAT
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Marking Scheme Science SPM Trial Exam 2010
