sains k2 trial spm pahang 2008 (ans)

8/14/2019 Sains K2 Trial SPM Pahang 2008 (ANS)

1/14

PERATURAN PEMARKAHAN

PENILAIAN BERSAMA PERCUBAAN SPM (SAINS) 2008

PAHANG

QUE ANSWERS Mar

Mar

1(a)

(b)

(c)

(d)

SECTION A

Able to draw the graph of the volume of gas against timecorrectlyAnswer1. Transfer of all points correct - 1 mark2. Smoothness of the curve - 1 mark

Able to state the relationship between the volume of gas Z andtime correctly

Sample answer

1. When the time increases the volume also increases

Able to state the responding variable correctlySample answer

1. The volume of gas

Able to write the volume of gas Z at the fifth minute correctlySample answer

1. According to the graph drown by the candidates.2. No mark will be awarded if no graph is drawn.

2

1

1

1

Total

2

1

1

1

5


2/14

2 (a)

(b)

(c)(i)

(c)(ii)

(d)

Able to measure the focal distance of lens B correctlyAnswer

1. 6.2 cm. (+ and - 0.2) or

2. The actual length as on the question paper

Able to predict the focal distance of a convex lens which isthinner than lens B correctlySample answer

1. The length must be longer than 6.4 cm2. The answer depend on the size of the diagram on question paper

Able to state the manipulated variable correctlySample answer

1. The size of the lens2. The thickness of the lens


1. The focal length2. The image distance

Able to show the relationship between manipulated variableand the responding variable for the experimentcorrectlySample answer

1. The thinner the thickness of convex lens the focal distanceis longer

2. Thicker convex lens have shorter focal length3. Thinner convex lens have longer focal distance

1

1

1

1

1

Total

1

1

1

1

1

------5

===


3/14

3 (a)

(b)

(c)

(d)

(e)

Able to state is the weight of the plasticine in the air accuratelyAnswer

1. 14 (N)

Able to state one observation of the experiment correctlySample answer

1. The weight of plasticine decrease in the water compared tothe air

2. Plasticine more lighter in water than air3. Plasticine heavier in air than water

Able to write one inference based on the observation correctlySample answer

1. The present of upthrust force2. The present of buoyant force

Able to state the constant variable correctlySample answer

1. Size of plasticine2. Mass of the plasticine

Able to predict the weight of plasticine in sea water correctlySample answer

1. more lighter2. less than 6N3. < 6N

1

1

1

1

1

Total

1

1

1

1

1

5===


4/14

4(a)(i)

(a)(ii)

(b)

(c)

(d)

Able to state the manipulated variable correctlySample answer

1. Type of plastic


1. The hardness of the plastic

Able to show the relationship between manipulated variableand the responding variable for the experimentcorrectlySample answer

1. Thermoplastic is softer than thermosett

2. Thermosett is harder than thermoplastic

Able to state the operational definition for the thermoplasticscorrectlySample answer

1. Thermoplastic is a plastic that become soft when heated.2. Thermoplastic is a plastic that become soft when put under

higher temperature.

Able to tick the objects which are made from thermoplasticcorrectly.

Sample answer

1. The candidate must tick under Telephoneand Electric plug2. Both answers must be correct.3. One answer is not acceptable.

1

1

1

1

1

Total

1

1

1

1

1

5


5/14

5(a)(i)

(a)(ii)

(b)(i)

(b)(ii)

(c)

(d)

SECTION B

Able to name structure P in Diagram 5 accuratelyAnswer

P:Sensory neurone

Able to state the function of structure P accuratelyAnswer

1. To transmit impulse to the brain

Able to name the receptor that involve in this system correctlySample answer

1. Stretch receptor

2. Proprioceptor

Able to state the function of receptor correctlySample answer

1. To detect any slight movement in the body2. To detect any contraction of the muscle

Able to state example of daily activities that involve in thesystem correctlySample answer

1. Buttoning shirt without looking2. Riding bicycles without looking at the pedals3. Typing text using a computer without looking at the

keyboard.

Able to state the importance of the system to human correctlySample answer

1. To maintain balanced coordination of the body

1

1

1

1

1

1

Total

2

2

1

1

6


6/14

6(a)

(b)

(c)

(d)

Able to name the gametes P and Q accuratelyAnswer

P: Sperms

Q: Ovum

Able to name the process X and Y accuratelyAnswer

Process X: Fertilization

Process Y: Mitosis

Able to name cell M accurately

Answer

Zygote

Able to state the type of twin formed accuratelyAnswer

Identical twin

2

1

1

1

1

Total

2

2

1

1

6


7/14

7(a)

(b)

(c)(i)

(c)(ii)

(d)

Able to name the process shown in Diagram 7 correctlySample answer

1. Radioactive decay

2. Nuclear fission

Able to state the radioactive radiations labelled S and TaccuratelyAnswer

S: Gamma rays

T: Alfa rays

Able to identify the negatively charged radiation accuratelyAnswer

1. R2. Beta (rays)

Able to name the product other than radiation correctlySample answer

1. Heat2. Energy

Able to state one uses of radioactive radiation in medicine

correctlySample answer

1. To kill cancerous cells in radiotherapy2. To sterilise medical equipment3. To diagnose / cure certain diseases

1

2

1

1

1

Total

1

2

2

1

6


8/14

8(a)(i)

(a)(ii)

(b)

(c)

(d)

(e)

Able to name the type of immunity acquired by the patientcorrectlySample answer

1. The passive artificial immunity2. The passive immunity

Able to name the substance injected to the patient accuratelyAnswer

Antiserum

Able to state correctly the source of immunity acquirednaturally.Sample answer

1. From mother to the foetus during pregnancy2. From mothers milk

Able to name the immunity represented by the graph inDiagram 8.2 correctlySample answer

1. Active artificial immunity2. Vaccine3. Active immunity

Able to explain the purpose of the second injection of vaccinecorrectlySample answer

1. To increase the level of antibodies in the blood beyond theimmunity level.

2. To boosts the production of antibodies in the blood.

Able to state the happening in the body after vaccinationcorrectly

Sample answer

1. The white blood cells are stimulated to produce antibodies2. The lymphocytes are stimulated to produce more antibodies

1

1

1

1

1

1

Total

2

1

1

1

1

6


9/14

9(a)(i)

(a)(ii)

(b)

(c)

(d)

Able to identify substance R correctlyAnswer

Ammonium compounds

Able to state the form of nitrates that can be absorbed by theplants correctly.Sample answer

1. Solution2. ionic form

Able to name the types of bacteria involved in processes P andQ accurately

Answer

P: Nitrogen fixing bacteria

Q: Denitrifying bacteria

Able to name the plant involved in process P correctlySample answer

1. Legume plant2. Groundnut

3. Rhizobium4. Been plant

Able to state one example of chemical fertilizer whichincreases nitrates in soil correctlySample answer

1. Ammonium nitrate

1

1

2

1

1

Total

2

2

1

1

6


10/14

10(a)

(b)(i)

(b)(ii)

(b)(iii)

SECTION C

Able to show the relationship between manipulated variableand the responding variable correctly

Sample answer

1. Vulcanised rubber is more elastic than natural rubber2. Vulcanised rubber is less elastic than natural rubber

Able to write the aim of the experiment correctlySample answer

1. To investigate the elasticity of vulcanised and naturalrubber.

2. To study the elasticity of vulcanised and natural rubber

Able to identify the variables correctlySample answer

Manipulated variable

1. type of rubber2. vulcanised rubber and natural rubber

Responding variable

1. The elasticity of the rubber2. Ability to return to its former length after stretching

3. The length of the rubber after hanging with the weight

Constant variable

1. Length of the rubber before stretching2. The mass of the weight / 500g weight3. Time4. The size of the rubber

[Any two variable]

Able to list the functional apparatus and materials to be usedin the experiment correctly

Sample answer

Vulcanised rubber, natural rubber, weight with a mass of 500g,string, 2 clips, a stop watch, a retort stand and meter ruler (lengthmeasuring instrument)

1

1

2

1

1

1

2

1


11/14

(b)(iv)

(b)(v)

11(a)

Able to write the procedure for the experiment correctlySample answer

1. Clip both end of the vulcanised rubber // Diagram2. One clip is used to hang the vulcanised rubber to a retort

stand and the clip at the other end is tied with 500 g weight3. After 30 minutes take out both clip4. Measure the length of the vulcanised rubber // record the

length of the vulcanised rubber5. Repeat procedure 1 to 4 for natural rubber

[Any four procedure]

Able to draw the table correctly

Sample answer

Type of rubber The elasticity of the rubber // Thelength of the rubber after hanging

Vulcanised rubber

Natural rubber

Able to state explain four uses of ammonia in everyday lifecorrectlySample answer

1. To make paints and colouring agents2. To make synthetic fibres / nylon3. To make nitric acid to be used in industry

4. To prevent latex from clotting in rubber industry5. To make cooling agent in air conditioner / refrigerator6. To make ammonia fertilisers used in agriculture7. To make trinitrotoluene / TNT use in rock explosion8. To make laundry detergent

[Any four]

4

1

Total

4

4

1

10

4


12/14

11(b) Able to identify the information from Diagram 10 correctlySample answer

1. Stainless steel, bronze and brass are example of alloy.2. Stainless steel is made up of iron and carbon, bronze is

made up of copper and tin and brass is made up of copperand zinc.

Able to identify the common characteristics of the alloy inDiagram 10 correctlySample answer

1. The alloys are made up of two or more elements.2. The foreign atom will stop the sliding of main atoms3. The alloy is stronger than its pure metal / element

4.[Any two]

Able to state other example of alloy correctlySample answer

1. Pewter2. Duralumin3. Cupronickel

Able to state non example of alloy and reasons correctlySample answer

1. Any pure metal(eg. Tin, copper, zinc)2. Plastic, wood etc.

Reason: Its does not make from two or more metals.

Able to state the actual concept of alloy correctlySample answer

1. Alloy is a mixture of two or more elements / metals which isstronger than its pure metals or non metals

1

2

1

1

1

Total

1

2

1

1

1

10


13/14

12(a)

(b)

Able to state four ways how the processed and packed foodbecome spoilt, correctlySample answer

1. Won out package that allow the microorganism toenter the food

2. Expiry date is over3. Food is not kept under correct temperature / proper

place4. Contamination occur during packaging5. Food is not process according to standard

[Any four]

Able to identify the aim of choice correctlySample answer

1. To maintain the freshness of vegetables and fruit forseveral days

Able to explain two methods of maintaining freshness of thevegetables and fruits correctlySample answer

1. Cooling: Keep the fruit and vegetables under 0 oC to 10 oC

2. Vacuum packing: The process of preparing food by releasing allair from the food container.

3. Irradiation: Processing food by exposing to radioactive radiation.

(Any two method and its explanations)

Able to list the methods according to its priority correctly

Sample answer

1. Cooling2. Vacuum packing

3. Irradiation

4

1

4

1

4


14/14

Able to select the most suitable method and giving reasoncorrectlySample answer

The most suitable method is COOLING because it can be doneunder 0 oC to 10 oC / in the cooling section of the regenerators.

1

Total

6

10

sains k2 trial spm pahang 2008 (ans)

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