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Page 1: Science Trial Kedah

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Page 44: Science Trial Kedah

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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Page 45: Science Trial Kedah

______________________________________________________________________________________ Marking Scheme Science SPM Trial Exam 2010

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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Page 46: Science Trial Kedah

______________________________________________________________________________________ Marking Scheme Science SPM Trial Exam 2010

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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Page 47: Science Trial Kedah

______________________________________________________________________________________ Marking Scheme Science SPM Trial Exam 2010

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:

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

Plane mirror Cermin satah

X image

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Page 48: Science Trial Kedah

______________________________________________________________________________________ Marking Scheme Science SPM Trial Exam 2010

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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Page 49: Science Trial Kedah

______________________________________________________________________________________ Marking Scheme Science SPM Trial Exam 2010

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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Page 50: Science Trial Kedah

______________________________________________________________________________________ Marking Scheme Science SPM Trial Exam 2010

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

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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Page 51: Science Trial Kedah

______________________________________________________________________________________ Marking Scheme Science SPM Trial Exam 2010

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

2 2 2

TOTAL 6

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Page 52: Science Trial Kedah

______________________________________________________________________________________ Marking Scheme Science SPM Trial Exam 2010

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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Page 53: Science Trial Kedah

______________________________________________________________________________________ Marking Scheme Science SPM Trial Exam 2010

10

seedling seedling seedling

Complete culture solution

Culture solution without nitrogen

Culture solution without phosphorus

Quest No

Marking Criteria Mark Σ Marks

10 (iv) Procedure

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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Page 54: Science Trial Kedah

______________________________________________________________________________________ Marking Scheme Science SPM Trial Exam 2010

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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Page 55: Science Trial Kedah

______________________________________________________________________________________ Marking Scheme Science SPM Trial Exam 2010

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 nuclei

Produce four daughter 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

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