SULIT

UntukKegunaanPemeriksa

10

The Diagram 3.2 shows two animals P and Q.Rajah3.2 menunjukkan dua haiwanP dan Q.

P

Diagram3.2Rajah3.2

State one common characteristic animals P and Q have.

Nyatakan satu ciri sepunya bagiP dan Q.

5512

(c)

5512

[1mark]I markahl

[Lihat halaman sebelahSULIT

SULIT

UntukKegunaanPemerik.sa

12

Energy exists in various forms. Diagram 4.1

knagawujud dalam banyak bentuk. Rajah 4.1

5512

shows one of the various forms of energy.

menunj ukkan salah satu daripada bentuk tenaga.

'=,{+-"iE:

-t\F

"€,:

**

(a) Name the form of energy

Namakan bentuk tenagaRajah 4.1 di atas.

Diagram 4.1

Rajah 4.1

that exist in the food shown in Diagram 4.1 above.

yang terdapat di dalam makanan seperti dituniukkan dalam

5512

[1 mark]

ll markahl

[Lihat halaman sebelahSULIT

SULIT

(b)

13

Diagram 4.2 shows a source of energy.

Rajah 4.2 menunjukkan satu sumber tenaga.

(i)

Diagram4.2Rajah 4.2

State the energy changes which occur in the windmill inDiagram 4.2.

Nyatakan perubahan tenaga yang berlaku pada kincir angin pacla Rajah 4.2

I mark]

ll markahl

Based on Diagram 4.2, state one advantage of this source of energy.

Berdasarkan Rajah 4.2, ny-atakan sotLt kelebihcm bogi stunber tenaga ini.

[1 mark]

II markahl

(ii)

****€

€J:{.

5sl2

5512

UntukKegunaanPenteriksa

ILihat halaman sebelahSULIT

SULIT

UntukKegunaanPemeriksa

5512

5512

State the condition of the volume and the air pressure in the glass jar in Table 5.1.

Nyatakan keadaan isipadu dan teknnan di dalam balang knca dalam Jadual5.l.

Stmcture of model

Struktur modelX Y

Volume in the glass jar

Isipadu di dalam

balang kaca

Pressure in the glass jar

Tekanan di dalam

balang kaca

[2 marks]

12 markahl

18

(i)

(c) Diagram 5.3 shows a campaign by the government.Rajah 5.3 menunjukkan satu kempen oleh kerajaan

(i)

oj?*

Diagram 5.3Rajah 5.3

State one problem in the respiratory system for those who ignore this campaign.Nyatakan satu masalah dalam sistem respirasi bagi seseorang yang mengabaikan

kempen ini.

[l mark]U markahl

[Lihat halaman sebelahSULIT

SULIT

(ii)

(ii)

19

Most smoker find it difficult to stop smoking. Give one reasonKebanyakanperokokmendapati sukar untukberhentimerokok. Berikan satu sebab.

[1 mark]

ll markahl

(d) Diagram 5.4 shows two sources of air pollution.Rajah 5.4 menunjukkan dua punca pencemaran udare.

(i)

Diagram 5.4Rajah 5.4

State one harmful effect on human respiratory system caused by these sources.Nyatakan satu kesctn bahaya terhadap sistem respirasi manusia yang disebabkanoleh sum be r-sumbe r i ni.

[1mark]ll markahl

Suggest one way to reduce these pollutant.Cadangkan satu cara untuk mengwrangkan bahan pencemar ini.

[1 mark]

ll markahl

5512

5512

UntukKegunaanPemeriksa

[Lihat halaman sebelahSULIT

1

55/2

SCIENCE

PMR

Ogos 2012

PEPERIKSAAN PERCUBAAN

PENILAIAN MENENGAH RENDAH 2012

SCIENCE

KERTAS 2

PERATURAN PERMARKAHAN

UNTUK KEGUNAAN PEMERIKSA SAHAJA

___________________________________________________________________________

Peraturan pemarkahan ini mengandungi 17 halaman bercetak

2

No Mark Scheme Mark

1(a)

Able to name the class of animal P, Q and R correctly

Answer

P: Reptilia Q: Amphibian R: Mammals

* 3 correct = 2 marks

* 2 correct = 1 mark

2

1(b)

Able to match with its characteristic correctly.

Answer

Animals

Haiwan

Characteristics

Ciri-cirinya

P Giving birth to live young.

Melahirkan anak

Q Laying eggs without shell.

Bertelur tidak bercengkerang.

R Laying eggs with shell.

Bertelur bercengkerang

1

1

1

3

3

No Mark Scheme Mark

1(c)

Able to choose animal which has the same class as animal R.

Answer

1

1

TOTAL A1 6

√

4

No Mark Scheme Mark

2 (a)(i)

Able to name the structure of L.

Sample Answer

1. Valve

2. Bicuspid valve

Notes: If the name of the valve mention, only accept only bicuspid valve.

1

1

2(a)(ii)

Able to state the function of structure L.

Sample Answer

1. To ensure that the flow of blood is in one direction.

2. To ensure blood flows in one direction from the left atrium to the left

ventricle.

Notes: If sample answer is chosen, only accept the direction from the left

atrium to the left ventricle.

1

1

2(b)(i)

Able to name the part labelled T.

Answer

1. Phloem

1

1

2(b)(ii) Able to state the function of the part labelled U.

Sample Answer

1. Transport water and dissolved mineral salts.

2. Transport water and dissolved mineral salts from the root to the other

part of the plant.

3. Helps to support the plants.

1

1

5

No Mark Scheme Mark

2(c)(i)

Able to choose the person entitle to receive Sofea’s blood.

Answer

Patient

Pesakit

Blood Group

Kumpulan Darah

Emelda

O

Emeriz

AB

Erizmi

B

1

1

2(c)(ii)

Able to state the type of blood which is called as universal donor

Answer

1. Group O

1

1

TOTAL A2 6

√

6

No Mark Scheme Mark

3(a)

Able to label the position of pectorial girdle correctly.

Answer

1

1

3(b)(i)

Able to state the support system of the whale

Answer

Water buoyancy

1

1

3(b)(ii)

Able to give reason correctly

Answer

The whale has small endoskeleton that does not much support to its body

weight.

1

1

3(c)

Able to state one common characteristic correctly.

Answer

Both animals have endoskeleton

1

1

3(d)

Able to explain why water vertebrates can grow much larger.

Answer

The skeleton of the animal does not have to support the whole weight of the

animal because the upthrust of water does.

2

2

TOTAL A3 6

Pectorial girdle

Lengkungan pelvis

7

No Mark Scheme Mark

4(a)

Able to name the form of energy correctly.

Answer

1. Chemical energy

1

1

4(b)(i)

Able to state the energy changes correctly

Sample Answer

1. Changes from kinetic energy to electrical energy

2. Kinetic energy electrical energy

1

1

4(b)(ii)

Able to state the advantage of the source of energy.

Sample Answer

1. Low cost or cheap

2. Renewable

3. Can be used over and over again

4. Cannot be used up

5. Never run out

6. Can be replenish

7. Always available

8. Unlimited source

9. No pollution

10. Clean

1

1

4(c)(i)

Able to choose which coconut has a higher potential energy.

Sample Answer

1. Coconut R

2. R

1

1

8

No Mark Scheme Mark

4(c)(ii)

Able to explain how is the height of a coconut tree influence the potential

energy correctly.

Sample Answer

1. The higher the coconut tree, the higher the potential energy.

2. The lower the coconut tree, the lower the potential energy.

3. As the height of the coconut tree increases, the potential energy

increases.

4. As the height of the coconut tree decreases, the potential energy

deceases.

5. The height of the coconut tree is direct proportional with the potential

energy.

1

1

4(c)(iii)

Able to explain why is coconut R produced louder sound when it falls?

Sample Answer

1. The coconut R tree is higher; it has a higher potential energy. These

will make it has a higher energy. Because of these, it will make the

sound become louder.

2. The coconut tree is higher; it has a higher potential energy and when

it changes to kinetic energy, the kinetic energy also higher compared

to S. Because of these, it will make the sound become louder.

3. Because it has a higher potential energy.

4. Because it has a higher kinetic energy.

1

1

TOTAL A4 6

9

No Mark Scheme Mark

5(a)(i)

Able to complete the sequence correctly.

Sample Answer

1

1

5(a)(ii)

Able to give one characteristic correctly.

Sample Answer

1. Thin wall (one cell thick)

2. Lined by a thin layer of moisture

3. Surrounded by large network of blood capillaries

1

1

5(b)(i)

Able to state the condition correctly.

Answer

All correct - 2 marks

2-3 correct - 1 mark

1 correct - 0 mark

Structure of model

Struktur model

X Y

Volume in the glass jar

Isipadu di dalam balang kaca

increase decrease

Pressure in the glass jar

Takanan di dalam balang

kaca

decrease increase

1

1

2

5(c)(i)

Able to state one problem correctly.

Sample Answer

1. Can have emphysema

2. Heart diseases

3. Bronchitis

4. Lung cancer

1

1

P Q R Lungs

10

No Mark Scheme Mark

5(c)(ii)

Able to give a reason correctly.

Sample Answer

In the cigarette contain nicotine that makes a smoker addicted to it.

1

1

5(d)(i)

Able to state the effect correctly.

Sample Answer

1. Can cause breathing difficulties

2. Damage lung tissues

1

1

5(d)(ii)

Able to suggest the way to reduce pollutant correctly.

Sample Answer

1. Use unleaded fuel

2. Industries should install filters on smokestacks

3. Car-pool practising

1

1

TOTAL A5 8

11

No Mark Scheme Mark

6(a)(i)

Able to state the uses of lime water.

Sample Answer

to check for the presence of carbon dioxide

1

1

6(a)(ii)

Able to state the result of the observation.

Sample Answer

limewater turns cloudy // chalky.

1

1

6(a)(iii)

Able to complete the words equation from the reaction.

Answer

All correct - 2 marks

1 correct - 0 mark

1

1

2

6(a)(iv)

Able to state the element correctly.

Sample Answer

calcium, carbon and oxygen

1

1

Calcium carbonate

Kalsium karbonat

heated calcium

oxide +

carbon

dioxide

12

No Mark Scheme Mark

6(b)(i)

Able to name the product formed.

Sample Answer

calcium hydroxide // slaked lime

1

1

6(b)(ii)

Able to state the uses of the product.

Sample Answer

Slaked lime is added to the soil to reduce the acidity of the soil.

1

1

6(b)(iii)

Able to give a reason.

Answer

Slaked lime is alkali.

1

1

6(c)

Able to state changes of the colour of red litmus paper.

Sample Answer

ERed litmus paper turns blue.

1

1

TOTAL A6 8

13

No Mark Scheme Mark

7(a)(i)

Able to state the observation.

Sample Answer

P : Float on water//Timbul (terapung)di permukaan air

Q: Sink in water//Tenggelam dalam air

* P berada di atas air

Q berada di bawah air

1

1

2

7(a)(ii)

Able to classify the object.

Sample Answer

Less dense than water : Object P

Denser than water : Object Q, R

1

1

2

7(a)(iii)

Able to give an inference.

Answer

Inference :

1. P floats on water because it less dense than water. Or

2. Q sink in water because it denser than water.

1

1

7(a)

( iv)

Able to state the relationship.

Sample Answer

If the density of object is higher than density of water, it will be sink in

water.

or

If the density of object is lower than density of water, it will be float on

water.

1

1

SALAH

14

No Mark Scheme Mark

7(b)

Able to state the prediction.

Sample Answer

Cork : Float / Timbul

Wood : Sink / Tenggelam

1

1

2

TOTAL B7 8

No Mark Scheme Mark

8(a)(i)

Able to state the difference by observing the diagram.

Sample Answer

Teapot M is black, Teapot N is white. // Teapot M is darker than Teapot N.

1

1

8(a)(ii)

Able to state the result from observing the situation in the diagram.

Sample Answer

Coffee in Teapot M. // In Teapot M. // Teapot M. // M

1

1

8(a)(iii)

Able to state a reason.

Sample Answer

The dark surface radiates heat better than the white surface.

1

1

15

No Mark Scheme Mark

8(b)(i)

Able to read the reading of the stop watch and record the reading.

Sample Answer

Conical flasks

Kelalang kon

e perat re of ater C)

Suhu air C)

0 minute

0 minit

10 minutes

10 minit

20 minutes

20 minit

30 minutes

30 minit

P

85

75

65

55

Q

85

79

73

67

1

1

No Mark Scheme Mark

8(c)

Able to state the hypothesis correctly.

Sample Answer

The darker the colour of surface, the lower the temperature of water. /// if the

colour of the surface is darker, the temperature of water decreases / lower. //

The temperature of water lower / decreases when the colour of surface is

darker.

1

1

8(d)

Able to state the variable involved in the experiment.

Sample Answer

Manipulated variable

Pembolehubah dimanipulasi

Colour of the surface / type of the surface

Responding variable

Pembolehubah bergerak balas

The temperature of water

1

1

2

16

No Mark Scheme Mark

8(e)(i)

Able to draw a graph using the data in the table.

Sample Answer

1

1

2

e perat re of ater )

Suhu air C) min )

Time ( min )

Masa di dalam

kelalang kon Q (

min )

60

70

80

90

0

10

20

30

40

50

10

20

30

17

No Mark Scheme Mark

8(e)(ii)

Able to state the relationship between the type of surface and the temperature

of water.

Sample Answer

1. The temperature of water is lower when the colour of surface is dull

and dark but the temperature is higher when the colour of surface is

white and shiny.

2. The darker the surface, the lower the temperature of water.

1

1

8(e)(iii)

Able to make a prediction

Sample Answer

Less than 45oC

1

1

8(f)

Able to define operationally the ‘heat release’

Sample answer

1. Heat release is shown by the decreasing of the temperature of water

in conical flask.

2. Heat release is shown when the temperature of water in conical flask

is lower.

3. Heat release is the temperature of water

1

1

TOTAL B8 12

JUMLAH 60