This document contains the marking scheme for the 2010 Kedah State SPM trial exam for Science Papers 1 and 2. It provides the answers to all questions on the papers and criteria for awarding marks. The marking scheme is confidential and for examiners only, and may not be shared or reproduced in any form without permission. It contains 12 pages of information on how to evaluate student responses for the Science exam.

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44. 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
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45. 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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46. 3
MARKING SCHEME ( PAPER 2 )
Quest
No
Marking Criteria Mark Σ
Marks
1 SECTION A
(a) 0.4
(b) (i) Does not conduct electricity
(ii) Conduct electricity
(c) (i) Constant variable:
1. Number of dry cells
2. Voltage of dry cells
3. Type of electrode
(c) (ii) Responding variable:
1. Reading of ammeter
2. Electrical conductivity (of lead(11) bromide)
1
1
1
1
1
1
1
1
1
1
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
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
Logam X
Metal Y
Logam Y
√
(b)(i) Manipulated variable: Type of metal
(ii) Responding variable:
1. Reactivity of metal
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
minutes)
2. Reactivity of metal is the number of gas bubbles
released (by the metal when it reacts with
water)
1
1
1
1
1
1
1
1
1
1
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Marking Scheme Science SPM Trial Exam 2010
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47. 4
Quest
No
Marking Criteria Mark Σ Marks
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
(b)
Note:
X
Plane mirror
Cermin satah
image
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)
3. laterally inverted
4. upright
5. image distance and object distance from the
plane mirror are the same
Note: Any one characteristic
(d) 3.55
1
2
1
1
1
2
1
1
TOTAL 5
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Marking Scheme Science SPM Trial Exam 2010
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48. 5
Quest
No
Marking Criteria Mark Σ
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
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)
Note:
1. All points are transferred correctly – 1m
2. Smooth graph - 1m
(c) As the time increases the number of mucor
colonies increases
(d) 6
1
2
1
1
1
2
1
1
TOTAL 5
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Marking Scheme Science SPM Trial Exam 2010
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49. 6
Quest
No
Marking Criteria Mark Σ
Marks
5 SECTION B
(a) Distillation
(b) (i) liebig condenser
(ii)
Note : Any arrow accepted
(c) liquid
(d) 1. to break the air bubbles when the mixture is
boiling
2. to prevent the mixture in the flask from rising
and enters the branch of the condenser
(e) because ethanol and water have different
boiling point.
1
1
1
1
1
1
1
1
1
1
1
1
TOTAL 6
(a) P: Dry cell
Q: Lead-acid accumulator
(b) 1. portable/ transistor radio
2. torch light
3. clocks
4. shaver
(c) (i) 1. rechargeable
2. high voltage
3. use liquid as electrolyte
4. long lasting if maintained properly
(ii) sulphuric acid / acid
(d)
√ √ √
1
1
1
1
1
1
2
1
1
1
1
TOTAL 6
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Marking Scheme Science SPM Trial Exam 2010
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50. 7
Quest
No
Marking Criteria Mark Σ Marks
7 (a) (i) tree /grass
(ii) deer
(iii) tiger
(b) tree/grass deer
(c) sun
(d) increase
1
1
1
1
1
1
______________________________________________________________________________________
Marking Scheme Science SPM Trial Exam 2010
3
1
1
1
TOTAL 6
8 (a) Fuel X: Liquid hydrogen
Fuel Y: Kerosene
(b)(i) Jet (plane)
(ii) Because oxyen (for the burning of the fuel)
is obtained from the surrounding air.
(c)
(d) Conservation of momentum
1
1
1
1
1
1
2
2
1
1
TOTAL 6
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51. 8
Quest
No
Marking Criteria Mark Σ Marks
9
(a) (i) X
(ii) Y
(b)
Type of
Rubber
Characteristics of rubber
X ●
Y●
· High ability to absorb
sound
· Chemicals and oil
resistant
· Not easily flammable
· Easily oxidised with
oxygen
Note:
1. One characteristic for Rubber X – 1 mark
2. One characteristic for Rubber Y - 1 mark
(c)
The Products
Produk
Types of rubber
Jenis Getah
Industrial gloves
Y// Synthetic
rubber
Rubber stopper
X//Natural
rubber
1
1
2
1
1
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Marking Scheme Science SPM Trial Exam 2010
2
2
2
TOTAL 6
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52. 9
Quest
No
Marking Criteria Mark Σ Marks
10
SECTION C
(a) Hypothesis
1. Plants need (complete) nutrients for healthy
growth
2. The healthy growth of plants need complete
nutrient
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
plants
(ii) Variables
· Constant variable :
1. Volume of culture solution
2. Type of seedling
· Manipulated variable:
1. Type of culture solution
2. complete culture solution, culture solution
without nitrogen and culture solution
without phosphorus
· Responding variable:
1. Growth of plant/seedling
2. Number/colour/ size of leaf
3. Length/ size of roots
(iii) Apparatus and materials:
complete culture solution
culture solution without nitrogen
culture solution without phosphorus
three test tubes
plant/seedling
1
1
1
1
1
1
1
1
Max
2
1
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Marking Scheme Science SPM Trial Exam 2010
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53. 10
Marking Criteria Mark Σ Marks
10 (iv) Procedure
seedling seedling seedling
Complete
culture
solution
Culture
solution
without
nitrogen
Culture
solution
without
phosphorus
Quest
No
Note: Diagram pt 1 and pt 2
1. Put complete culture solution in test tube A
2. Put seedling/plant in test tube A.
3. Repeat step 1 and 2 by using culture solution
without nitrogen and culture solution without
phosphorus.
4. The apparatus are left for two weeks
5. The growth of seedling/ plant is observed (after
two weeks)
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
tube C.
2. Put seedling/plant in each test tube
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
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
1
1
1
1
1
1+1
1
1
Max 4
1
TOTAL 10
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Marking Scheme Science SPM Trial Exam 2010
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54. 11
Quest
No
Marking Criteria Mark Σ Marks
11(a)
Characteristic alpha gamma
1. Nature Helium nucleus Electro-magnetic
Radiation
2. Charge Positive Neutral
3. Speed Slow Speed of light
4. Penetration
power
Low, can be
blocked by a
sheet of paper
Highest, can
only be
blocked by a
thick lead or a
thick concrete
5 Ionising effect Strong Lowest
6 Electrical field
effect
Deflect towards
negative plate
Does not
deflect
*Note : Any four differences
1
1
1
1
1
1
Max
4
11(b)
· Identify the problem:
Improper handling of radioactive substances can
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
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
2.Wear film badge that can measure the degree of
exposure to radiation.
3.Use remote control equipment to move
radioactive substance
4.Have regular medical check-up to maintain good
health.
5. Radioactive substances need to be kept in
a thick lead box
6. Warning symbol of radioactive substance must be
displayed at places that store radioactive
resource.
*Note : Any four methods
1
1
1
1
1
1
1
1
1
1
Max 4
TOTAL 10
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Marking Scheme Science SPM Trial Exam 2010
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55. 12
Quest
No
Marking Criteria Mark Σ Marks
12(a)
Mitosis Meiosis
Maintains the
chromosome number
Halves the chromosomes
number
Has one division cycle Has two division cycles
Produce two daughter
Produce four daughter
nuclei
nuclei
Does not involve
crossing over and
independent assortment
Involving crossing over
and independent
assortment
Produces daughter
nuclei that are
genetically identical to
one another and to the
parent nucleus
Produce daughter nuclei
that are genetically
different from one
another and from the
parent nucleus
Note : Any four comparison
1
1
1
1
1
Max 4
12(b)
· Common characteristic:
1. Characters are discrete/qualitative/ graded on a
scale
2. Characters cannot be measured
3. Determined by a single gene to distinct effect
4. Discrete distribution curve graph is obtained.
5. Can be inherited
Note : Any two common characteristics
· Other example:
1. type of blood group
2. colour blindness
3. physical appearance
Note : Any one relevant answer
· Two non-examples
1. weight
2. skin colour
3. height
Note : Any two relevant answers
· Actual Concept
Discontinuous variation is a type of variation that has
characters which are discrete and determined by a
single gene with distinct effect.
1
1
1
1
1
1
1
1
1
1
1
Max 2
Max 1
Max 2
1
TOTAL 10
END OF MARKING SCHEME
SKEMA PEMARKAHAN TAMAT
______________________________________________________________________________________
Marking Scheme Science SPM Trial Exam 2010
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