Trial Pmr 2008 Sabah - Science Paper 2

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Section A Bahagian A [40 marks] [40 markah] Answer all questions Jawab semua soalan

1

Diagram 1 shows two types of cells. Rajah 1 menunjukkan dua jenis sel.

Cell X

Cell Y

Sel X

Sel Y DIAGRAM 1

Rajah 1 (a) Label two of the following structures in Diagram 1 for cell X and Cell Y. Labelkan dua daripada struktur berikut di dalam Rajah 1 untuk sel X dan sel Y. Cell membrane Membran sel

Chloroplast Kloroplas

Cytoplasm Sitoplasma

1(a)

[2 marks] [2 markah] (b) N contains genetic materials. It controls all the activities of the cell. Mark N on cell X or cell Y on Diagram 1. N mengandungi bahan genetic. Ia mengawal semua aktiviti di dalam sel. Tandakan N pada sel X atau sel Y pada Rajah 1.

1(b)

[1 mark] [1 markah] (c ) Name structure N. Namakan struktur N. _________________________________________________________________ [ 1 mark ] [1 markah]

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1(c)

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(d) i. Which of the cell shown in Diagram 1 is a plant cell? Sel yang manakah dalam Rajah 1 ialah sel tumbuhan.

1(d)(i)

________________________________________________________________ [1 mark] [1markah ] ii. Give one reason for your answer in 1(d)(i). Beri satu sebab bagi jawapan anda di 1(d)(i)

1(d)(ii)

_______________________________________________________________ _______________________________________________________________ [ 1 mark] [ 1 markah ]

Total

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2 Food Makanan

Karbohidrat

X

Lemak

Garam mineral Vitamin

Serat

Air

The above chart shows the food classes. Carta di atas menunjukkan kelas-kelas makanan (a)(i) What is the class for food X? Apakah kelas makanan X?

(ii)

_______________________________________________________________ [ 1mark ] [ 1 markah ] State two functions of food X.

2(a)(i)

Nyatakan dua fungsi kelas makanan X. _______________________________________________________________

2(a)(ii)

_______________________________________________________________ [ 2 marks ] [ 2 markah ] (b)

Give two examples of carbohydrates. Berikan dua contoh karbohidrat. _______________________________________________________________ _______________________________________________________________ [ 2 marks ] [ 2 markah ]

(c)

Which class of food is the main energy supplier ?

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2(b)

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Kelas makanan yang manakah membekalkan sumber tenaga utama ?

2(c)

_______________________________________________________________ [ 1 mark ] [ 1 markah ] (d)(i) Which class of food should a person suffering from constipation eat more? Kelas makanan apakah yang perlu dimakan lebih oleh seseorang yang 2(d)(i)

mengalami sembelit? _______________________________________________________________ [ 1 mark ] [ 1 markah ] (ii) How does the class of food in d(i) help to relieve constipation ?

2(d)(ii)

Bagaimanakah kelas makanan di (d)(i) membantu mengatasi sembelit? _______________________________________________________________ [ 1 mark ] [ 1 markah ]

Total

3 Diagram 2 shows an apparatus set up to show the effect of air pressure. Rajah 2 menunjukkan susunan alat radas kesan tekanan udara. 55/2 Excel 2 2008 Science PMR Paper 2

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Round bottle flask Kelalang bulat

Diagram 2 Rajah 2 a) What happens to the balloon when the Bunsen burner is turned on? Apakah yang berlaku kepada belon apabila Penunu Bunsen dihidupkan? ______________________________________________________________ [1 mark ] [ 1 markah ] b) Give a reason for your answer in (a) Berikan alasan bagi jawapan anda di (a).

3(a)

3(b)

______________________________________________________________ [1 mark ] [ 1 markah ] c) What conclusion can you make based on this experiment about the relationship between air pressure and temperature? Berdasarkan eksperimen ini apakah kesimpulan anda tentang hubungan antara tekanan udara dengan suhu? ______________________________________________________________

3(c)

______________________________________________________________ [1 mark ] [ 1 markah ] d) If the flask is uncorked, do you think the balloon will expand? Explain.

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Jika kelalang tidak ditutup dengan gabus, adakah belon akan mengembang? Jelaskan. ______________________________________________________________

3(d)

______________________________________________________________ ______________________________________________________________ [2 marks ] [ 2 markah ]

Total

4

Diagram 3 shows the stages of germination of a green bean seed. Rajah 3 menunjukkan peringkat percambahan biji benih kacang hijau.

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Diagram 3 Rajah 3 (a) i. State the part of the seed that first appears during germination. Nyatakan bahagian yang muncul dahulu semasa percambahan ______________________________________________________________ [ 1 mark ] [ 1 markah ] ii. Which part of the seed grows to become the shoot? Bahagian manakah yang akan tumbuh menjadi pucuk?

4(a) (i)

4(a) (ii)

______________________________________________________________ [ 1 mark ] [ 1 markah ] (b) Explain what happens at stage 1. Terangkan apakah yang berlaku pada peringkat 1 ______________________________________________________________ ______________________________________________________________ [ 2 marks] [ 2 markah] (c) i. During which stage does the seedling start to make its own food? Pada peringkat manakah anak benih mula membuat makanannya sendiri?

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4(b)

4(c) (i)

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______________________________________________________________ [ 1 mark ] [ 1 markah ] ii. Explain your answer in ( c ) i. Terangkan jawapan anda di (c) i

4(c) (ii)

_____________________________________________________________ _ ______________________________________________________________ [ 2 marks ] [ 2 markah ]

Total

5

Diagram 4 shows the fractional distillation of petroleum. Rajah 4 menunjukkan penyulingan berperingkat petroleum

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Diagram 4 Rajah 4 (a) Name the products in the boxes provided. Namakan bahan yang terhasil dalam kotak yang disediakan [4 marks] [ 4 markah ] Table 4 shows the characteristics of the products from the distillation. Jadual 4 menunjukkan ciri-ciri hasil penyulingan.. Temperature range oC Julat Suhu oC

50 – 100

100 – 150

150 – 200

Dark yellow Kuning Tua

200 - 250

Colour Warna

Colourless Tidak berwarna

Yellow Kuning

Viscousity Kelikatan

Not viscous Tidak likat

Less viscous Viscous Kurang Likat likat

Very viscous Sangat Likat

Soot produced Penghasilan Jelaga

A little Sedikit

A little Sedikit

A lot Banyak

A lot Banyak

5(a)

Brownish Perang

Table 4 / Jadual 4 (b) What conclusion can be drawn from the results above? Apakah kesimpulan yang boleh dibuat daripada keputusan di atas?

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The higher the boiling point of the fraction, Semakin tinggi takat didih pecahan, maka i) ________________________________________________________

ii) ________________________________________________________

iii) _________________________________________________

5(b)

[3 marks] [ 3 markah ]

c) What is the use of product D? Apakah kegunaan hasil D?

5(c)

____________________________________________________________________ [1 mark] [ 1 markah ]

Total

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Diagram 6 shows the structure of a simple transformer. Rajah 6 menunjukkan struktur ringkas transformer.

Diagram 6 Rajah 6 (a) What is the function of the transformer in the electricity transmission system? Apakah fungsi transformer di dalam sistem penghantaran elektrik. _____________________________________________________________ _____________________________________________________________ [ 1 mark ] [ 1 markah]

6(a)

(b) Name coil X and coil Y . Namakan gelung X dan gelung Y. X : ______________________________ 6(b)

Y : _____________________________ [ 2 marks ] [2 markah] (c) Name the type of transformer shown in the figure above? Namakan jenis transformer yang ditunjukkan dalam rajah di atas? _____________________________________________________________ [ 1 mark ] [ 1 markah] (d) i. Which bulb is brighter? 55/2 Excel 2 2008 Science PMR Paper 2

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6(c)

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Mentol manakah yang menyala dengan lebih terang? _____________________________________________________________ [ 1 mark ] [1 markah] ii. Explain your answer in (d) i. Terangkan jawapan anda pada (d) i

6(d)(i)

_____________________________________________________________ [ 1 mark ] [ 1 markah]

6(d)(ii)

Total

For

Section B

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Bahagian B [20 marks] [20 markah] Answer all questions. Jawab semua soalan

7 Diagram 7 shows pictures of organisms K, L, M and N. Rajah 7 menunjukkan gambar organisma K, L, M dan N.

Diagram 7 Rajah 7 Observe the organisms in diagram 7. Based on your observation. Perhatikan organisma pada rajah 7. Berdasarkan pemerhatian anda. (a) State one characteristic for organisms K, L, M and N Nyatakan satu ciri bagi organisma K, L, M dan N. K : _________________________________________________________ L : _________________________________________________________ M : __________________________________________________________ N : __________________________________________________________ [ 4 marks ] [ 4 markah]

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7(a)

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(b) Classify organisms K,L,M and N into two groups based on common characteristics. State the organisms that belong to each group. Kelaskan organisma K,L,M dan N kepada dua kumpulan berdasarkan ciri-ciri sepunya. Nyatakan organisma mengikut kumpulan.

For Examiner’s use

K,L,M,N

Common Characteristic Ciri-ciri sepunya

Organisms Organisma

[ 4 marks ] [ 4 markah ]

7(b)

Total

8 A student found that a spring extends more when a heavier load is attached to it as shown in Diagram 8.1. 55/2 Excel 2 2008 Science PMR Paper 2

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Pelajar mendapati pemanjangan spring bertambah apabila beban yang lebih berat diletakkan seperti yang ditunjukkan dalam rajah 8.1.

Diagram 8.1 Rajah 8.1 (a) i. Based on the observations in Diagram 8.1, state the differences in the extension of the spring. Berdasarkan pemerhatian anda pada Rajah 8.1, nyatakan perbezaan pemanjangan spring. _______________________________________________________________ [ 1 mark ] [ 1 markah] ii. State your hypothesis based on your observations in Diagram 8.1. Nyatakan hipotesis berdasarkan pemerhatian anda pada Rajah 8.1.

8(a)(i)

8(a)(ii)

______________________________________________________________ [ 1 mark ] [1 markah]

(b) A student carries out an experiment to investigate the situation in Diagram 8.1. Diagram 8.2 shows the set-up of apparatus for the experiment. Seorang pelajar menjalankan eksperimen untuk mengkaji situasi seperti 55/2 Excel 2 2008 Science PMR Paper 2

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SULIT dalam Rajah 8.1. Rajah 8.2 menunjukkan

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penyediaan alat radas untuk eksperimen.

Diagram 8.2 Diagram 8.2 The student takes the following steps: Pelajar mengambil langkah-langkah berikut: Step 1 : Record the initial length of the spring. Langkah 1 ; Catatkan ukuran awal spring. Step 2 : Place a load of 20g on the dish and record the pointer reading on the Metre ruler. Langkah 2: Letakkan beban seberat 20g di atas piring dan catatkan bacaan pada pembaris meter. Step 3 : Repeat step 2 by replacing the load with different masses ranging from 40g to 120g. Langkah 3 : Ulangi langkah 2 dengan menggantikan beban dengan julat jisim yang berbeza dari 40g hingga 120g. For Examiner’s use

Record the observation below in Table 8.1. Catatkan pemerhatian ke dalam Jadual 8.1.

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The mass of load: 20g Jisim beban : 20g

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The mass of load: 40g Jisim beban: 40g

The mass of load : 60g Jisim beban : 60g

The mass of load: 80g Jisim beban : 60g

The mass of load: 100g Jisim beban :100g

The mass of load: 120g Jisim beban : 120g

Note: 1 kg = 10 N Nota: 1 kg = 10 N

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SULIT Force (N) Daya(N) Extension of spring Pemanjangan spring

20 0.0

0.2

0.4

55/2 0.6

0.8

1.0

1.2

0.0

TABLE 8.1

[2 marks] [2 markah] (c ) Using data in the table 8.1, draw a graph of extension of the spring against force.

Dengan menggunakan data dalam jadual 8.1, lukiskan graf Pemanjangan spring Melawan Daya.

8(c)

[ 3 marks ] [3 markah ]

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(d) Based on the graph, give the relationship between the force exerted by the load and the extension of the spring. Berdasarkan graf, berikan hubungan di antara daya yang dikenakan oleh beban dan pemanjangan spring.

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_________________________________________________________________ 8(d)

_________________________________________________________________ [ 1 mark ] 1 markah] (e) State the variables in this experiment. Nyatakan pembolehubah dalam eksperimen ini. Manipulated variable Pembolehubah dimanipulasikan

8(e)

Responding variable Pembolehubah bergerakbalas

[2 marks] [2 markah]

(f) Predict the extension of the spring if the mass of the load is 160g. Ramalkan pemanjangan spring jika jisim beban 160g. 8(f)

___________________________________________________________________ [1 mark] [1 markah] (g) Based on this experiment, what can you conclude about the relationship between the force exerted by the load and the extension of the spring? Berdasarkan eksperimen ini, apakah kesimpulan anda tentang hubungan di antara daya yang dikenakan oleh beban dan pemanjangan spring? _______________________________________________________________________

8(g)

__ ________________________________________________________________________ __

[1 mark] [1 markah]

Total

END OF QUESTION PAPER KERTAS SOALAN TAMAT 55/2 Excel 2 2008 Science PMR Paper 2

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