55/2 pra penilaian menengah rendah 2012 · pdf fileinggeris. jumlah jangan buka kertas soalan...
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SCIENCE
Kertas 2
1 ½ jam
PRA PENILAIAN MENENGAH RENDAH 2012
SCIENCE
Kertas 2
Satu jam tiga puluh minit
JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU
Kertas soalan ini mengandungi 15 halaman bercetak
[Lihat sebelah
1. Tulis nama penuh dan tingkatan anda
pada ruangan yang disediakan.
2. Kertas soalan ini adalah dalam Bahasa
Inggeris.
3. Calon dikehendaki membaca maklumat di
halaman belakang kertas soalan ini.
Untuk Kegunaan Pemeriksa
Kod Pemeriksa:
Bahagian Soalan Markah
Penuh
Markah
Diperoleh
A
1 6
2 6
3 6
4 6
5 8
6 8
B
7 8
8 12
JUMLAH 60
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Section A
[40 marks]
Answer all questions.
1 Diagram 1 shows a cross ction of a dicotyledonous seed.
Rajah 1 menunjukkan suatu keratan rentas biji benih dikotiledon.
DIAGRAM 1
Rajah 1
(a) On Diagram 1, label the structure L, M and N using the following words.
Pada rajah 1, labelkan struktur L, M dan N menggunakan perkataan
berikut:
[ 3 marks ]
(b) Draw lines to match the structure to its correct function.
Lukis garisan untuk memadankan struktur dengan fungsinya yang betul.
[ 3 marks ]
Cotyledon Radicle Testa
Kotiledon Radikel Testa
L :
M :
N :
L
Provides food for the seedling during gemination
Membekalkan makanan kepada anak benih semasa
percambahan.
Grow out and develop into roots
Keluar dan berkembang membentuk akar
Potects the seed
Melindungi biji benih
M
N
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2 Diagram 2 shows the apparatus set-up to study the use of gas during germination.
Rajah 2 menunjukkan alat radas yang dipasangkan untuk mengkaji gas yang
digunakan semasa percambahan.
DIAGRAM 2
Rajah 2
(a)(i) What can be observed to the indicator at the end of this activity?
Apakah yang boleh diperhatikan ke atas penunjuk di akhir aktiviti?
............................................................................................................................
[1 mark]
(ii) Explain your answer in (a)(i).
Terangkan jawapan anda di (a)(i)
.......................................................................................................................
..........................................................................................................................
[1 mark]
(iii) Why is the cotton wool soaked in sodium hydroxide solution?
Mengapakah bulu kapas direndamkan di dalam larutan natrium
hidroksida?
.........................................................................................................................
[1 mark]
(b) What happens to the drop of indicator if the germinating seed is replaced
with cockroach ?
Apa akan berlaku kepada titisan penunjuk jika biji benih yang bercambah
digantikan dengan lipas ?
.................................................................................................................................
[1 mark]
Cotton wool soaked with
sodium hydroxide solution
Kapas direndam dengan
larutsn natrium hidroksida
Indicator
Penunjuk
Boiling tube
Tabung didih
Germinating seeds
Biji benih bercambah
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(c ) Suggest how the gas released in this experiment can be tested.
Cadangkan bagaimana gas yang dibebaskan boleh diuji.
Method
Kaedah: . .....................................................................................
Results
Keputusan: ........................................................................................
[2 marks]
3 Diagram 3.1 shows the apparatus set-up for a food test
Rajah 3.1 menunjukkan alat radas untuk suatu ujian makanan
DIAGRAM 3.1
Rajah 3.1
(a)(i) State the class of food in sample food P if a red precipitate is formed.
Nyatakan kelas makanan dalam sampel makanan P jika mendakan merah
terbentuk .
. ................................................................................................................
[1 mark]
(ii) Give one function food class in (a)(i).
Beri satu fungsi kelas makanan dalam (a)(i)
......................................................................................................................
[1 mark ]
Food sample P + Millon
reagent
Sampel makanan P + reagen
Millon
Water
Air
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(iii) State one disease cause by insufficient of this food class to the children.
Nyatakan satu penyakit akibat kekurangan kelas makanan ini ke atas
kanak-kanak.
..................................................................................................................
[ 1 mark ]
(b) Diagram 3.2 shows the human digestive tract
Rajah 3.2 menunjukkan salur pencernaan manusia
(i) Name organ P
Namakan organ P.
................................................................................................................
[ 1 mark ]
(ii) Which class of food is digested at P?
Apakah kelas makanan yang dicernakan di P?
...................................................................................................................
[ 1 mark ]
(iii) Give one reason why P must be acidic.
Berikan satu alasan mengapakah P perlu berasid.
...............................................................................................................
[ 1 mark ]
P
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5 Diagram 5 shows two filament bulbs, P, Q and R with different power ratings.
Rajah 5 menunjukkan dua mentol filamen, P, Q dan R yang mempunyai kuasa
berlainan.
Diagram 5
Rajah 5
(a)(i) State the bulb that save energy the most if the bulbs are used at the same
period of time.
Nyatakan mentol yang paling menjimatkan tenaga jika mentol-mentol
digunakan untuk tempoh masa yang sama.
................................................................................................................
[ 1 mark ]
(ii) Explain your answer in (a)(i)
Terangkan jawapan anda di (a)(i)
...................................................................................................................
[ 1 mark ]
(iii) Calculate the energy used if bulb Q is swiched on for 5 hours.
Hitungkan tenaga yang digunakan jika mentol Q dihidupkan selama 5
jam.
[ 2 marks ]
Q
60 W, 240V 100 W, 240V
P R
25 W, 240V
Energy (kWh) = Power (kW) x Time (h)
Tenaga (kWj) = Kuasa (kW) x Masa (j)
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(b)(i) Bulb P, Q and Q is used in a lighting circiut of a house. State how the
three bulbs should be connected.
Mentol P, Q dan R digunakan dalam litar lampu sebuah rumah.
Nyatakan bagaimana ketiga-tiga mentol sepatutnya disambungkan.
....................................................................................................................
[ 1 mark ]
(ii) Give reason for answer in (b)(i)
Beri alasan bagi jawapan (b)(i)
.....................................................................................................................
[ 1 mark]
(iii) Explain how this connection helps the consumer saved energy
Terangkan bagaimana penyambungan ini membantu menjimatkan tenaga
pengguna.
.....................................................................................................................
.....................................................................................................................
[ 2 marks]
4
Diagram 4 shows a carbon cycle.
Rajah 4 menunjukkan suatu kitar karbon.
DIAGRAM 4
Rajah 4
Carbon dioxide in the atmosphere
Karbon dioksida dalam atmosfera
Process K
Plant respiration
Respirasi tumbuhan
Animal respiration
Respirasi haiwan
Decaying of dead organisms
Pereputan organisma mati
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(a)(i) State process K.
Nyatakan proses K.
..............................................................................................................................................
[ 1 mark ]
(ii) State one importance of process K to living things
Nyatakan satu kepentingan proses K kepada benda hidup
.............................................................................................................................................
[ 1 mark ]
(iii) State the primary source of energy in the carbon cycle.
Nyatakan sumber utama tenaga dalam kitar karbon.
..................................................................................................................................
[ 1 mark ]
(c)(i) Carbon compounds from decayed organisms in a millions of years can changed
into into fossil fuel. Explain how fossil fuel formed from the decayed organisms
Sebatian karbon daripada organisma reput berjuta tahun boleh berubah menjadi
bahan api fosil. Terangkan bagaimana bahan api yang terbentuk daripada
organisma yang mereput.
..................................................................................................................................
.................................................................................................................................
.................................................................................................................................
[ 2 marks]
(ii) Give one example of the fossil fuel formed.
Berikan satu contoh bahan api fosil terbentuk.
..................................................................................................................................
[ 1 mark ]
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6. Diagram 6.1 shows the longitudal section of human ear.
Rajah 6.1 menunjukkan mekanisma penglihatan manusia yang normal.
Diagram 6.1
Rajah 6.1
(a)(i) Name the structure that allows the sound vibration to enter the ear.
Namakan struktur yang membenarkan getaran bunyi masuk ke dalam telinga.
...........................................................................................................................
[ 1 mark ]
(ii) Explain what happens to sound vibration before and after it reaches cochlea
Terangkan apa yang berlaku kepada getaran bunyi sebelum dan selepas ia
sampai ke koklea.
...............................................................................................................................
..............................................................................................................................
[ 2 marks]
(iii) Give one part of the the ear which does not involve in the hearing mechanism.
Berikan satu bahagian telinga yang tidak terlibat dengan mekanisma
pendengaran.
...............................................................................................................................
[ 1 mark ]
(iv) Explain why an old man is hardly to hear?
Terangkan mengapa seorang tua sukar mendengar?
.....................................................................................................................................
[ 1 mark ]
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(b) Diagram 6.2 shows an activity to study the property of sound.
Rajah 6.2 menunjukkan suatu aktiviti untuk mengkaji sifat bunyi
Diagram 6.2
Rajah 6.2
(i) What happen to the sound of the bell when it hit the wooden plank .
Apakah yang terjadi pada bunyi loceng apabila ia mengena pada kepingan kayu.
..............................................................................................................................
[ 1 mark ]
(ii) State one property of sound.
Nyatakan satu sifat bunyi.
..............................................................................................................................
[ 1 mark ]
(iii) Explain how this sound property help the bat to find its way at night.
Terangkan bagaimana sifat bunyi ini mebantu kelawar mencari jalannya pada
waktu malam.
................................................................................................................................
[ 1 mark ]
Plastic tube
Tiub plastik Bell
Loceng
Ear
Telinga
Wooden plank
Kepingan papan
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Section B
[20 marks]
Answer all questions.
7 Diagram 7.1 an activity to investigate the boiling point of different water.
Rajah 7.1 menunjukkan suatu aktiviti untuk menyiasat takat didih air berlainan.
Distilled water
Air suling
water + Salt
air + Garam
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Diagram 7.1
Rajah 7.1
Based on the observation in diagram 7.1,
Berdasarkan pemerhatian pada rajah 7.1,
(a) Record the reading of thermometer in table 7.2
Rekodkan bacaan termometer dalam jadual 7.2
Type of water
Jenis air
Reading of thermometer ( 0C)
Bacaan termometer
Distilled water
Air Suling
100 0C
Water + salt
Air +garam
Sugar +water
Air + gula
[ 2 marks]
(b)(i) State the difference in boiling point of water without impurities and with
impurities.
Nyatakan perbezaan takat didih air tanpa bendasing dan air yang ada
bendasing.
.........................................................................................................................
[ 1 mark ]
(ii) State one inference based on the observation.
Nyatakan satu inferens berdasarkan pemerhatian.
....................................................................................................................
[ 1 mark]
water + Sugar
air + Gula
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(iii) State the relationship between the presence of impurities in water and
boiling point of water.
Nyatakan hubungan antara kehadiran bendasing dalam air dengan
takat didih air.
..................................................................................................................
[ 1 mark ]
(c) Table 7.3 shows boiling point of some sample water taken from different
sources.
Jadual 7.3 menunjukkan takat didih sampel air yang diambil daripada
sumber
berlainan.
Boiling point (0C )
Takat didih ( 0C )
100 0C 110
0C 130
0C
Sample water
Sampel air
Rain water
Air hujan
River water
Air sungai
Sea water
Air laut
Classify sample water based on their boiling point
Kelaskan sampel berdasarkan takat didih mereka.
Impurities
Bendasing
Sample water
Sampel air
Does not contain impurities
Tidak mengandungi bendasing
Contain impurities
Mengandungi bendasing
[ 1 mark]
( d) Based on the the activities, what can you deduce about the effect of
impurities on boiling of water.
Berdasarkan aktiviti-aktiviti ini, apakah yang boleh anda deduksikan
mengenai kesan bendasing terhadap takat didih air.
........................................................................................................................
[ 1 mark ]
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8. Diagram 8.1 shows the reaction between metal P, Q and R with oxygen.
Rajah 8.1 menunjukkan tindakbalas antara logam P, Q dan R dengan oksigen.
Potassium manganate crystals
Hablur kalium manganat
Potassium manganate crystals
Hablur kalium manganat
Metal Q - glow
Logam Q berbara
Metal R - Burns brightly
Logam R Terbakar dengan terang
Potassium manganate crystals
Hablur kalium manganat
Metal P - Burn very brightly
Logam P Terbakar dengan sangat
terang
Diagram 8.1
Rajah 8.1
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(a) the observation , state what happen when the metal react with
oxygen .
Berdasarkan pemerhatian ,nyatakan apa yang berlaku apabila
logam bertindakbalas dengan oksigen .
Metal P : Burn very brightly
Logam P Terbakar sangat terang
Metal Q :
Logam Q
Metal R :
Logam R
[ 2 marks ]
(b) Based on the experiment, record the time taken for the reaction to
complete in table 8.4
Berdasarkan pemerhatian , rekodkan masa yang diambil untuk
tindakbalas lengkap dalam jadual 8.4
Table 8.4
Jadual 8.4
[2 marks ]
(c) State the variables involved
Nyatakan pemboleh ubah yang terlibat .
(i) Manipulated variable :
Pemboleh ubah di manipulasi
……………………………………………………
(ii) Responding variable :
Pemboleh ubah bertindakbalas
………………………………………………………
[ 2 marks ]
Metal react with oxygen
Logam bertindakbalas dengan oksigen
Time taken(s)
Masa yang diambil (s)
P 10 s
Q
R
…………………………………………………..
…………………………………………………..
8 (b)
8 (a)
8 (c)
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(d) Based on table 8.4 , draw a bar chart of reaction of metal oxygen
against
time taken for reaction .
Berdasarkan jadual 8.4 , lukis carta bar bagi tindakbalas logam
oksigen dengan masa yang diambil semasa tindakbalas .
P Q R
Metal
Logam
[ 2 marks ]
8 (d)
Time taken for
reaction to
complete(s)
Masa lengkap
tindakbalas
berlaku
10
20
30
40
50
60
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(e) Based on the experiment , state the relationship between the reactivity
of metal with time taken for reaction to complete
Berdasarkan eksperimen , nyatakan hubungan antara tindakbalas logam
dengan masa tindakbalas selesai .
…………………………………………………………………………
…………………………………………………………………………
[ 1 mark ]
( f ) Based on the experiment , state the operational definition of the
‘reactivity of metal .’
Berdasarkan eksperimen , nyatakan definisi secara operasi
‘ kereaktifan logam .’
……………………………………………………………………………
…………………………………………………………………………
[1 mark ]
8 (e)
8 (f)
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INFORMATION FOR CANDIDATES
1. This question paper consists of two sections: Section A and Section B.
2. Answer all questions in both sections.
3. Write your answers in the spaces provided in the question paper.
4. Show your working, it may help you to get marks.
5. If you wish to change your answer, neatly cross out the answer that you have done. Then
write down the new answer.
6. The diagrams in the questions provided are not drawn to scale unless stated.
7. Marks allocated for each question or sub-part of a question are shown in brackets.
8. The time suggested to complete Section A is 60 minutes and Section B is 30 minutes.
9. You may use a non-programmable scientific calculator.
10. Hand in this question paper at the end of the examination.