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PERCUBAAN PMR 2009 MARKING SCHEME SUBJECT CODE SUBJECT PAPER

QUESTION SOALAN

1

(a)

(b)

(c)

55 / 2 SCIENCE TWO

ANSWER IN ENGLISH VERSION / JAWAPAN DALAM VERSI BAHASA MELAYU

MARK MARKAH

Students should be able to label the parts of the heart in Diagram 1 correctly; P : Pulmonary vein Vena Pulmonari Q : Tricuspid valve Injap tricuspid R : Left ventricle Ventrikel kiri Students should be able to state the function of part P. P carries oxygenated bloods from the lungs to the left atrium // carries blood from the lung to the heart. P membawa darah beroksigen dari paru-paru ke atrium kiri // Membawa darah beroksigen dari paru-paru ke jantung

1 1

1

Students should be able to state the parts that ensures blood flows in one

direction only.

1

Q / tricuspid valve / bicuspid valve / semilunar valve Inja Q/ injap tricuspid / injap bicuspid / injap semilunar Total

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1

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2

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QUESTION SOALAN

2

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ANSWER IN ENGLISH VERSION / JAWAPAN DALAM VERSI BAHASA MELAYU

MARK MARKAH

(a)

A student should be able to answer correctly;

(i) (ii) (iii)

Carbon dioxide / karbon dioksida Acidic / berasid Sodium hydroxide solution / larutan natrium hidroksida

(b)

A student should be able to state

(i)

Carbon dioxide // dust // sulphur dioxide //lead particles // carbon monoxide // nitrogen dioxide // smoke soot // haze //oxides of nitrogen// CFC // nicotine tar // tobacco tar // chemicals such as pesticides and DDT Karbon dioksida // debu // sulfur dioksida // zarah-zarah plumbum // karbon monoksida // nitrogen dioksida // jelaga asap // jerebu // nitrogen oksida // CFC // tar nikotin // tar tembakau // bahan kimia seperti racun perosak dan DDT

(ii)

1 1 1

Ban open burning / Melarang pembakaran terbuka Recycle / Kitar semula Avoid using CFC based products / Mengelakkan penggunaan bahanbahan berasas CFC Use unleaded petrol / Guna petrol tanpa plumbum Car pool / Berkongsi kereta Walk or cycle / Berjalan atau mengayuh basikal Replant trees / Menanam semula pokok Use less electricity / Guna kurang tenaga electrik TOTAL

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2

6

3

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QUESTION SOALAN

3

55/2

ANSWER IN ENGLISH VERSION / JAWAPAN DALAM VERSI BAHASA MELAYU

MARK MARKAH

(a)

Students will be able to name the producer and tertiary consumer, construct food chain and explain what happen to the ecosystem if all snakes died.

(i)

Producer: Maize Pengeluar : Jagung

(ii)

Tertiary consumer : Eagle Pengguna tertiary : Helang

(iii)

Maize Jagung

(iv)

There are many answers Terdapat beberapa jawapan

(b)

A student should be able to answer correctly;

(i)

4

1

(ii)

The Sun Matahari

1

1

1

1 Rat Tikus

Snake Ular

Eagle Helang 1

TOTAL

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4

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QUESTION SOALAN

4

(a)(i)

55/2

ANSWER IN ENGLISH VERSION / JAWAPAN DALAM VERSI BAHASA MELAYU

MARK MARKAH

A student should be able to name the gas in test tube P; Oxygen / oksigen

(a)(ii)

(b)

1

A student should be able to suggest a test to determine the gas collected in test tube Q . A ‘pop’ sound is heard when a lighted wooden splinter is inserted into the test tube. Bunyi ‘pop’ kedengaran apabila kayu uji menyala dimasukkan ke dalam tabung uji. A student should be able to give one use of the gas accumulated in test tube Q;

1

Fuel for rocket // Used in weather balloons Bahan api untuk roket // Digunakan dalam belon cuaca (c)

A student should be able to give one reason of adding the dilute sulphuric acid to the distilled water; 1

To increase the conductivity of electricity in distilled water. Menambahkan pengaliran electrik dalam air suling.

(d)

A student should be able to state the answers correctly ;

(i)

A compound Sebatian

(ii)

Because a molecule of water is made up of 1 atom of oxygen and 2 atoms of hydrogen // Because a molecule of water is made up of two types of atoms which are chemically combined. Kerana satu molekul air terdiri daripada 1 atom oksigen dan dua atom hydrogen // Kerana satu molekul air terdiri daripada dua atom yang digabungkan secara kimia.

1

TOTAL

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6

5

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QUESTION SOALAN

5

(a)

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ANSWER IN ENGLISH VERSION / JAWAPAN DALAM VERSI BAHASA MELAYU A student should be able to draw arrows, correctly;

MARK MARKAH

(i)

1

(ii)

A student should be able to state correctly;

(iv)

Convection / perolakan Hot water rises when heated, cool water sink to the bottom // when water is heated it expands and becomes less dense. The hot water moves upwards. Cold and denser water moves downwards to take its place. Air panas naik ke atas apabila dipanaskan, air sejuk tenggelam ke bawah // Apabila air dipanaskan, ia mengembang dan menjadi kurang tumpat// Air panas bergerak ke atas // Air sejuk dan lebih tumpat bergerak ke bawah untuk mengambil alih tempatnya . A student should be able to answer correctly;

(b)

Ventilation of building / car radiator / air conditioner / refrigerator / electric kettle Pengudaraan dalam bangunan / radiator kereta / penghawa dingin / cerek elektrik A student should be able to state correctly;

(iii)

(i)

Conduction of heat Pengaliran haba / Konduktor haba

(ii)

Material : metals(name of other metals) / nama logam

1

2

1

1

2

(iii)

Reason: Metals are good conductor of heat / Logam adalah pengalir/konduktor haba yang baik TOTAL

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8

6

SULIT

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QUESTION ANSWER IN ENGLISH VERSION / SOALAN JAWAPAN DALAM VERSI BAHASA MELAYU (a) A student should be able to state the source of energy used for 6 generating electrical energy; (i)

(ii)

MARK MARKAH

Diagram 6.1 - Used water / Guna air Diagram 6.2 - Used fossil fuel/ Guna bahan api fossil

2

To turn the dynamo / generator // To rotate the dynamo to produce electricity Memutarkan dynamo / janakuasa // memutarkan dynamo untuk menghasilkan elektrik.

1

(b)

A student should be able to state the type of transformer and give reason;

(i)

A step-up transformer Transformer injak naik

1

To reduce the amount of heat lost // To reduce the lost of electrical energy. Untuk mengurangkan kehilangan haba // Untuk mengurangkan kehilangan tenaga elektrik

1

(ii)

(c)

A student should be able to answer as following;

(i)

Step-up transformer Transformer injak naik

1

(ii)

M2

1

(iii)

40 volts Input voltage Output voltage

= Primary coil Secondary Coil

[must show working – 1 mark] [Answer correct with unit – 1 mark]

2 TOTAL

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7

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QUESTION SOALAN 7

(a )

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ANSWER IN ENGLISH VERSION / JAWAPAN DALAM VERSI BAHASA MELAYU A student should be able to state one characteristic of each flower P, Q, R and S, based on observation : P: small petal/stigma and anther hang outside the flower / long filament/ big anther / featherly stigma Q: Big petal / Stigma and anther are inside the flower / short filament, small anther. R: Big petal / Stigma and anther are inside the flower / short filament, small anther. S: small petal/stigma and anther hang outside the flower / long filament/ big anther / featherly stigma

7

(b)

MARK MARKAH 1 for every characteris tic ( max. 4 )

4

A student should be able to classify P, Q, R, and S into two groups, based on common characteristics P, Q, R, S

Common characteristic Ciri sepunya

Letters of the flowers Huruf-huruf bunga

1. 2. 3. 4. 5.

Long filament Big anther Small petals Featherly stigma Stigma & anther are hung outside the flower

1. 2. 3. 4. 5

Short filament Small anther Big petals Non-featherly stigma Stigma & anther are hung inside the flower

2

2 P, S

Q, R

TOTAL

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8

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QUESTION SOALAN 7

(a )

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ANSWER IN ENGLISH VERSION / JAWAPAN DALAM VERSI BAHASA MELAYU Pelajar sepatutnya boleh menyatakan satu ciri bagi setiap bunga P, Q, R and S, berdasarkan kepada pemerhatian: P: ranggi kecil/stigma dan anter bergantung di luar bunga / filament panjang/ big anter / stigma berbulu Q: ranggi besar / Stigma dan anter are inside the berada dalam bunga / filament pendek/ anter kecil. R: ranggi besar / Stigma dan anter are inside the berada dalam bunga / filament pendek/ anter kecil. S: ranggi kecil/stigma dan anter bergantung di luar bunga / filament panjang/ big anter / stigma berbulu

7

(b)

MARK MARKAH 1 for every characteris tic ( max. 4 )

4

Pelajar sepatutnya boleh mengelaskan P, Q, R, and S into two groupskepada dua kumpulan,berdasarkan kepada ciri sepunya. P, Q, R, S

Ciri sepunya

1. 2. 3. 4. 5.

Filamen panjang Anter besar Ranggi kecil Stigma berbulu Stigma & anter Tergantung di luar bunga

5. 6. 7. 8. 6

Filamen pendek Anter kecil Ranggi besar Stigma tidak berbulu Stigma & anter Tergantung di dalam bunga

Huruf-huruf bunga

2

2 P, S

Q, R

TOTAL

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8

9

SULIT

QUESTION SOALAN

8

55/2

ANSWER IN ENGLISH VERSION / JAWAPAN DALAM VERSI BAHASA MELAYU

MARK MARKAH

(a)

A student should be able to state the following variables;

(i)

Manipulated variable: Length of pendulum / string Pemboleh ubah yang dimanipulasikan: Panjang bandul / benang

1

(ii)

Responding variable: Time taken for ten complete swings Pembolehubah variable: Masa diambil untuk 10 ayunan lengkap

1

(b)

55 / 2

(i)

27 seconds

(ii)

36 seconds

(iii)

45 seconds

(iv)

54 seconds

(c)

A student should be able to record the readings of the stop watch in Table 8.1; Length of pendulum(cm) 0 15 30 45 60 75 90 Panjang bandul (cm) Time taken for ten complete swings(s) 0 9 18 27 36 45 54 Masa diambil untuk sepuluh ayunan lengkap(s)

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10

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QUESTION SOALAN

ANSWER IN ENGLISH VERSION / JAWAPAN DALAM VERSI BAHASA MELAYU

55/2

MARK MARKAH

(d)

Plot the graph – 1 mark 2 marks (All points correct - 2 marks) IF only (3 points correct 1 mark)

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3

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11

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QUESTION SOALAN

8

55/2

ANSWER IN ENGLISH VERSION / JAWAPAN DALAM VERSI BAHASA MELAYU

MARK MARKAH

(e) A student should be able to state the relationship between the time taken for ten complete swings with its length; As the length of pendulum increases, the time taken for ten complete swings increases // The longer the pendulum, the longer the time taken for ten complete swings // the shorter the length of pendulum, the shorter the time taken for ten complete swings. Apabila panjang bandul bertambah, masa diambil untuk 10 ayunan lengkap juga bertambah // Semakin panjang bandul, semakin lama masa diambil untuk 10 ayunan lengkap // Semakin pendek bandul, semakin pendek masa diambil untuk 10 ayunan.

(f)

A student should be able to give inference about the result of the experiment;

1

1

The time taken for ten complete swing is affected by the length of the pendulum // The time taken for ten complete swings depends on the length of pendulum// The length of pendulum influences the time taken for ten complete swings Masa yang diambil untuk 10 ayunan lengkap dipengaruhi oleh panjang bandul // Masa yang diambil untuk 10 ayunan lengkap bergantung kepada panjang bandul // Panjang bandul memepnegaruhi masa yang diambil untuk 10 ayunan lengkap. (g)

A student should be able to predict the time taken for ten complete swings, if the length of the pendulum is 50 cm;

1

30s (h)

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Students should be able to define operationally, “time taken for ten complete swing.” Students must write the answer beginning with “the operational definition for time taken is the reading of the stop watch .”

1

Calon mesti menulis jawapan bermula dengan “definasi secara operasi bagi masa yang diambil adalah bacaan jam randik untuk sepuluh ayunan.” TOTAL

12

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12

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