skema sains pmr 2012 paper 2 selangor
DESCRIPTION
SKEMA TRIAL PMR 2012 SAINSNEGERI SELANGORTRANSCRIPT
55/2
JABATAN PELAJARAN NEGERI SELANGORMAJLIS PENGETUA SEKOLAH MENENGAH
PROGRAM PENINGKATAN PRESTASI AKADEMIKPERCUBAAN PENILAIAN MENENGAH RENDAH 2012
PERATURAN PEMARKAHAN
SCIENCE PMR55/2
PPPA JPS 2012 : PERCUBAAN PMR 2012
55/2 ©2011 Hak Cipta Jabatan Pelajaran Negeri Selangor
MPSM
2
No. Mark scheme Mark Total1 (a)
(b)
Able to label the three types of cells.Answer :P : nerve cellsQ : white blood cellR : sperm cell
Able to match the organ with its function.Answer :
111
1
1
1
3
3
Total 6 marks2(a)
(b) (i)
Able to label P and Q correctly.Answer :P : acid Q : alkali
Able to state the products of neutralization process correctly.
11
2
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PERATURAN PEMARKAHAN SCIENCE PMR 55/2 PPPA JPS 2012 – PERCUBAAN PMR 2011
To pump bloodUntuk mengepam
darah
To digest foodUntuk menghadam
makanan
To excrete waste products
Untuk membuang bahan terbuang
3
(ii)
(iii)
Answer :a) Waterb) Salt
Able to state the method of neutralisation process.Answer : titration
Able to predict the pH value of the neutralisation product correctlyAnswer : 7
11
1
1
2
1
1
Total 6marks3(a)
(b)(i)
(ii)
(iii)
(c)(i)
(ii)
Able to name condition P correctlyAnswer:Fuel
Able to answer what happen to anhydrous cobalt chloride paper correctly.Answer:Turns to pink
Able to give one reason correctly.Answer :The presence of water.
Able to state another product of the combustion correctly.Answer :Carbon dioxide / energy
Able to predict what will happen to the combustion of the candle.Answer:The candle will extinguish faster / burn out faster / time taken for the candle to extinguish will be shorter.
Able to state one reason correctly.Answer :Exhaled air contain less oxygen.
1
1
1
1
1
1
1
1
1
1
1
1
Total 6marks4(a)
Able to name the machine.Answer:Dialysis machine.
1 1
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4
(b) (i)
(ii)
(c)
(d)
(e)
Able to state what is present in the urine correctly.Answer :GlucoseAble to state the reason correctly.Sample Answer:Kidney failed to filter the blood.
Able to state one disease that may lead to kidney failure correctlyAnswer: diabetes // high blood pressure
Able to mark in the box correctly.Answer:
√
Able to mark the food that should be avoided by a kidney failure in the box correctly.Answer :
Salted fish Orange Rice√
1
1
1
1
1
1
1
1
1
1
Total 6marks5(a)(i)
(b)
Able to label N correctly.Answer:Fuse
Able to compare the 3-pin plug and 2-pin plug.Answer:
3-pin plug 2-pin plugHas an earth wire Has no earth wire
1
11
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5
(c)
(d)(i)
(ii)
(iii)
Able to answer what will happen if the excessive current flows through an electrical in a 3-pin plug correctly.Sample Answer :The fuse will melt // break the circuit
Able to calculate the current flowing through the electric current correctlyAnswer:
Current = 1000 240 = 8.33 A
Able to circle the suitable rating of a fuse.
3A 5A 10A
Able to state what will happen when a higher value of fuse if used.Answer : The fuse will not function/electrical appliance will breakdown.
1
1
1
1
1
4
2
1
Total 8marks6(a)(i)
(b) (i)
(ii)
© (i)
Able to state the method of heat transferred.Answer:conduction
Able to write R, S and T in Table 6.2 correctly.Answer :
Iron Copper AluminiumT S R
Able to choose the most suitable material for the base P of the cooking utensil.Answer:Copper because it is a very good conductor of heat
Able to explain the method of heat transferred applied in
1
1
1 1
1
1
1
2
1
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6
(ii)
kettle.Answer :Convection.Heat energy is transferred through the water by the movement of water particles.
Able to give one example that apply the same method of heat transfer.Answer :household ventilation system / refrigerator
1
1
2
1
Total 8marks7(a)(i)
(ii)
(iii)
(iv)
(b)
Able to state one difference between the rats in ecosystem J and K after one month correctly.Answer :The number of rats in ecosyetem J increases while the number of rats in ecosyatem K decreases.
Able to state one inference of ecosystem J or KSample answer :
1. The number of rats in ecosystem J increases because there are plants/food.
2. The number of rats in ecosystem K decreases because there is not enough food//they have to compete for food.
Able to predict what happen to the rats if all the paddy plants died.Answer :The number of rats decreases.
Able to state the relationship between the number of paddy plant and the number of rats.Answer :The more the number of paddy plant, the number of rats.
Able to classify all the animals into two groups
1
1
1
1
4
1
1
1
1
4
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7
Answer :Secondary consumer Tertiaryconsumer
MonkeyMouse deer
LeopardSnake
Total 8marks8(a)(i) Able to state the difference in brightness of the bulb in set P
and Q.Answer:Bulb in set Q is brighter than P(vice versa)
1 1
(ii)
Able to write one inference about the brightness of the bulb in set PSample answers:Bulb P is dimmer than Q because has one dry cells/less dry
cell
1
1
(iii) Able to state the relationship between the number of dry cell and the brightness of the bulb. Answer:The more the number of dry cell the more brightness of the bulb (vice versa)
1 1
8(b)(i)
(ii)
Able to record the reading of the ammeterAnswer :0.22A
Able to draw graph
1 1
2
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8
(ii)
(iv)
(v)
(vi)
Transfer all points = 1 markJoin all points correctly = 1 mark
Able to state the relationship between the number of dry cells and the reading of ammeter.Answer :The higher the number of dry cell the higher the reading of ammeter.
Able to predict the reading of ammeter when five dry cells is used.Answer :Higher/more than 0.4A
Able to state the variables:Answer :
Able to write one hypothesis :Answer :The higher the number of dry cell the higher the reading of ammeter/value of current
11
1
1
1
1
1
2
1
1
2
1
8(c) Able to define operationally for current.Answer :Current is the ammeter reading.
1 1
Total 12marks
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Manipulated variable Number of dry cell
Responding variable Ammeter reading/value of current