SECTION A [ 40 MARKS]

1. Diagram 1 shows the three classes of lever Rajah 1 menunjukkan tiga kelas tuas Diagram 1 Rajah 1

(a) Label on diagram the class of lever using the following words: Labelkan pada rajah cara pemindahan haba menggunakan perkataan berikut:

[ 3 marks ]

First class lever Second class lever Third class lever Tuas kelas pertama Tuas kelas kedua Tuas kelas ketiga

P: Q: R:

(b) Draw lines to match the class of lever and its correct description Lukis garisan untuk memadankan kelas tuas dengan penerangannya yang betul.

[ 3 marks ]

Class of lever Kelas tuas

Description Penerangan

P

The load is in between the effort and fulcrum Beban terletak di antara daya dan fulkrum

Q

R

The effort is in between the load and fulcrum Daya terletak di antara beban dan fulkrum

The fulcrum is in between the load and effort Fulkrum terletak di antara beban dan daya

2. Diagram 2 shows an interaction between organisms in a habitat Rajah 2 menunjukkan satu interaksi antara organisma dalam suatu habitat

K L Diagram 2 Rajah 2

(a) Name the type of interaction between : Namakan jenis interaksi antara : (i) the two cockerels.

Kedua-dua ayam jantan ……………………………………………………………………………………………………………………… (ii) the cat and the rat Kucing dengan tikus ………………………………………………………………………………………………………………………. [ 2 marks ]

(b) Explain how stereoscopic vision helps the predator to hunt successfully. Terangkan bagaimana penglihatan stereoskopik membantu pemangsa memburu dengan jayanya.. ……………………………………………………………………………………………………………………………

[ 1 mark ]

(c) Give one example of organisms that interact same as in 2(a)(i) Berikan satu contoh organism yang berikteraksi sama seperti dalam 2(a)(i) …………………………………………………………………………………………………………………

[ 1 mark ] (d) Name the method in which interaction in 2(a)(ii) is used to control the population of

pest in an area. Namakan kaedah dimana interaksi dalam 2(a)(ii) digunakan untuk mengawal populasi perosak dalam suatu kawasan. ……………………………………………………………………………………………………………………………

[ 1 mark ] (e) State one advantage of the method in 2(d)

Nyatakan satu kebaikan kaedah dalam 2(d) ……………………………………………………………………………………………………………………………….

[ 1 mark ] 3. Diagram 3 shows the activity to measure the voltage and electric current in a circuit Rajah 3 menunjukkan suatu aktiviti untuk mengukur voltan dan arus elekterik dalam satu litar. Diagram 3 Rajah 3

(a) Name device Namakan alat P : ………………………………………………………………………………….. Q: ………………………………………………………………………………….. [ 2 marks ]

P Q

(b) State the difference in the connection of P and Q in the circuit. Nyatakan perbezaan penyambungan P dan Q dalam litar.

………………………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………….. [ 2 marks ]

(c) What will happen to reading of P and Q if one more bulb in connected in series? Apakah yang akan berlaku pada bacaan P dan Q jika satu lagi mentol ditambah secara bersiri?

Reading of P Bacaan P : ………………………………………………………………………………………………………… Reading of Q Bacaan Q :……………………………………………………………………………………………………………. [ 2 marks ] 4. Diagram 4.1the steps taken in an activity to test for starch in the leaf Rajah 4.1 adalah langkah-langkah yang diambil dalam suatu aktiviti untuk menguji kanji dalam daun. Diagram 4.1 Rajah 4.1 (a) Write the number in the box provided to show the correct sequence of steps.

Tulis nombor dalam kotak yang disediakan untuk menunjukkan urutan langkah-langkah yang betul. [ 2 marks ]

P Q R

Hot water

Air panas

Boiling

water

Air

mendidih

Alcohol

Alkohol

(b) Explain why it is important to heat alcohol in hot water. Terangkan mengapakah penting untuk memanaskan alkohol dalam air panas.

…………………………………………………………………………………………………………………………… [ 1 mark ] (c) Diagram 4.2 shows an experiment to investigate the product of photosynthesis.

Rajah 4.2 menunjukkan satu eksperimen untuk menyiasat hasil fotosintesis. Diagram 4.2 Rajah 4.2 (i) Explain why this experiment is kept under sunlight Terangkan mengapa ekspertimen ini dibiarkan dibawah cahaya matahari ……………………………………………………………………………………………………………………. [ 1 mark ] (ii) Name gas P Namakan gas P …………………………………………………………………………………………………………………… [ 1 mark ] (iii) Complete the word equation for photosynthesis. Lengakapkan persamaan perkataan bagi proses fotosintesis + + [ 1 mark ]

Sunlight

Cahaya matahari

Water + sodium bicarbonate

Air + natrium bikarbonat

Water weed

Rumpai air

Plasticine

Plastisin

Gas p

Carbon dioxide

Karbon dioksida Water

Air

Glucose

Glukosa

Sunlight

Cahaya matahari

Chlorophyll

Klorofil

5. Diagram 5.1 shows a magnet bar is hanged freely and stop at fixed direction

Rajah 2.1 menunjukkan sebatang magnet yang digantung secara bebas dan berhenti

pada kedudukan bebas.

Diagram 5.1

Rajah 5.1

a) Name both of the pole P and pole Q Namakan kutub P dan kutub Q

P : ………………………………………………………..

Q : ………………………………………………………..

[ 2 marks ]

b) Diagram 5.2 shows magnet in diagram 5.1 is brought near to another magnet Rajah 5.2 menunjukkan magnet dalam rajah 5.1 dibawa berdekatan sebuah magnet

lain.

N

P

Q

N P Q S

Diagram 5.2

Rajah 5.2

Rajah 2.2

Earth magnetic field

direction

Arah medan magnet bumi

(i) State what will happen to both magnet

Nyatakan apa akan terjadi pada kedua-dua magnet.

………………………………………………………………………………………………………………………..

[ 1 mark ]

(ii) Give reason four answer in (b)(i

Beri alasan bagi jawapan anda di (b)(ii)

……………………………………………………………………………………………………………………………

[ 1 mark ]

(iii) Draw the magnetic field lines on diagram 5.2

Lukiskan garis daya medan magnet pada rajah 5.2

[ 2 marks ]

(c) (i) State one difference between magnet in diagram 5.1 and electromagnet

Nyatakan satu perbezaan antara magnet dalam rajah 5.1 dengan electromagnet

………………………………………………………………………………………………………………………….

[ 1 mark ]

(ii) Give one example of device that use electromagnet in daily life

Beri satu contoh alat yang menggunakan elektromagnet dalam kehidupan harian

……………………………………………………………………………………………………………………….

[ 1 mark ]

6. Diagram 6 shows an activity to study reaction between metal and oxygen. Rajah 6 merupakan suatu aktiviti untuk mengkaji tindakbalas antara logam dan oksigen Diagram 6 Rajah 6 a) Name the new substance produced when metal react with oxygen Namakan bahan baru yang terhasil apabila logam bertindakbalas dengan oksigen ………………………………………………………………………………….. …………………………………………… [ 1 mark ] b) Write the word equation for the reaction in 6 (a). Tuliskan persamaan perkataan bagi tindak balas dalam 6(a). + [ 1 mark ]

Magnesium Magnesium

Oxygen Oksigen

Potassium manganate (VII) crystals Hablur kalium manganat (VII)

Glass wool Kapas kaca

Magnesium powder Serbuk magnesium

Retort stand Bunsen burner Kaki retort Penunu bunsen

c) Arrange the reactivity of matters between the copper, zinc and magnesium with oxygen in descending order. Susun keaktifan logam diantara kuprum, zink dan magnesium dengan oksigen dalam susunan tertib menurun

…………………………………………….. , ………………………………………………….. , ……………………………………………………

[ 2 marks ]

d) (i) State what happen when iron is left in the air. Nyatakan apa akan berlaku jika besi diabiarkan dalam udara. …………………………………………………………………………………………………………………………………………… [ 1 mark ] (ii) Explain your answer Terangkan jawapan anda. ………………………………………………………………………………………………………………………………………….. [ 1 mark ] (iii) State what is ‘rust’. Nyatakan apa itu ‘ karat ‘ ……………………………………………………………………………………………………………………………………….. [ 1 mark ] (iv) State one method to prevent rusting Nyatakan satu kaedah untuk mencegah pengaratan ……………………………………………………………………………………………………………………………………. [ 1 mark ]

SECTION B [ 20 marks ] 7. Diagram 7.1 shows three situation J,K and L of a device using the principle of lever

Rajah 7.1 menunjukkan tiga situasi J,K and L bagi satu alat yang menggunakan prinsip tuas

Diagram 7.1

Rajah 7.1

a) Based on Diagram 7.1

Berdasarkan Rajah 7.1

(i ) State the difference in the force needed to lift the rock

Nyatakan perbezaan daya yang diperlukan untuk mengangkat batu.

………………………………………………………………………………………………………………………….

[ 1 mark ]

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1 m

1 m

1 m

300 N

300 N

300 N

ii) State one inference based on your observation

Nyatakan satu inferens berdasarkan pemerhatian anda

………………………………………………………………………………………………………………………….

[ 1 mark ]

iii) State the hypothesis based on your observation. Nyatakan satu hipotesis berdasarkan pemerhatian anda.

...............................................................................................................................

[ 1 mark ]

(b) Table 7.2 shows the force needed to lift the rock

Jadual 2 menunjukkan daya yang diperlukan untuk mengangkat batu

Load Beban

Load distance Jarak beban

Force Daya

Force distance Jarak daya

300 N 1 m 300 N 1 m

300 N 1 m 150 N 2 m

300 N 1 m 100 N 3 m

[ 1 mark ]

(i) Predict the force needed if the distance of force is 4m.

Ramalkan daya yang diperlukan jika jarak daya ialah 4m.

..........................................................................................................................

[ 1 mark ]

(ii) State the relationship between distance of force from fulcrum and force.

Nyatakan hubungan antara jarak daya dari fulkrum dengan daya.

.....................................................................................................................................

[ 1 mark ]

(c) Diagram 7.3 shows four tools which used the principle of lever.

Rajah 7.3 menunjukkan empat alat yang menggunakan prinsip tuas.

Diagram 7.3

Rajah 7.3

Classify the tools based on the force needed to lift the load

Kelaskan alat-alat berdasarkan daya yang diperlukan untuk mengangkat beban.

Force

Daya

Tools

Alat

Less force needed to overcome big load

Kurang daya diperlukan untuk mengatasi beban besar

Bigger force needed to overcome small load

Lebih besar daya diperlukan untuk mengatasi beban

kecil

[ 4 marks ]

Nutcracker

Pemecah kacang Ice tongs

Penyepit ais

Fishing rod

Joran Bottle opener

Pembuka botol

8.(a) Table 8.1 shows the air pressure of tyre of three different vehicles.

Jadual 8.1 menunjukkan tekanan udara tayar untuk tiga jenis kenderaan.

Vehicle Kenderaan

Air pressure of tyre Tekanan udara tayar

220 kPa

400 kPa

500 kPa

(i) Based on the Table 8.1, compare the difference in the air pressure of the bus and the

lorry.

Berdasarkan Jadual 8.1, nyatakan perbezaan tekanan udara tayar di antara bas dan lori

…………………………………………………………………………………………………………………………………………

[ 1 mark]

(ii) State the relationship between size of vehicle and air pressure in the tyre.

Nyatakan hubungan antara saiz kenderaan dan tekanan udara dalam tayar

…………………………………………………………………………………………………………………………………………

[ 1 mark]

TABLE 8.1

JADUAL 8.1

Car

Kereta

Kereta Lorry

Lori

Bus

Bas

( b) A student carried out an experiment to study how the temperature affects the air

pressure. Diagram 8.2 shows the arrangement of apparatus for the experiment.

Seorang pelajar menjalankan eksperimen untuk mengkaji bagaimana suhu mempengaruhi

tekanan udara. Rajah 8.2 menunjukkan susunan alatan untuk menjalankan eksperimen.

DIAGRAM 8.2

RAJAH 8.2

The student takes the following steps:

Pelajar itu menjalankan langkah-langkah berikut.

1. The apparatus is set up as shown in Diagram 8.2.

Alatan itu disusun seperti ditunjukkan dalam Rajah 8.2

2. The water bath is heated until the temperature of water reaches 30 0C and

the Bourdon gauge reading is recorded.

Kukusan air dipanaskan sehingga suhu air mencapai 30 0C dan bacaan

tolok Bourdon dicatatkan.

3. Repeat step 2 with the temperature of water 40 0C, 50 0C, 60 0C and 70 0C.

Ulang langkah 2 dengan suhu air 40 0 C, 50 0C, 60 0C and 70

( i ) Record the Bourdon gauge reading in the space provided.

Catatkan bacaan Tolok Bourdon pada ruang yang disediakan.

The temperature of water = 400 C

Suhu air

Bourdon gauge reading = 108.5 kPa

Bacaan tolok Bourdon

The temperature of water = 30 0C

Suhu air

Bourdon gauge reading = 105 kPa

Bacaan tolok Bourdon

The temperature of water = 500 C

Suhu air

Bourdon gauge reading = ……………. kPa

Bacaan tolok Bourdon =

The temperature of water = 600 C

Suhu air

Bourdon gauge reading = ……………kPa

Bacaan tolok Bourdon

DIAGRAM 8.3

RAJAH 8.3

( ii) Based on Diagram 8.3, complete Table 8.4 by recording the Bourdon gauge reading on

the respective temperature of air.

Berdasarkan Jadual 8.3, lengkapkan Jadual 8.4 dengan mencatatkan bacaan Tolok

Bourdon yang sepadan dengan suhu air.

Temperature ( 0 C)

Suhu

30

40

50

60 70

Bourdon gauge reading (

kPa)

Bacaan tolok Bourdon

105.0

108.5

119

TABLE 8.4

JADUAL 8.4 [2 marks ]

119 kPa

( c ) State one inference from the experiment.

Nyatakan satu inferens daripada eksperimen itu.

…………………………………………………………………………………………………………………………………..

[ 1 mark]

( d ) State the variables involved in this experiment.

Nyatakan pembolehubah yang terlibat dalam eksperimen ini.

Manipulated variable

Pembolehubah yang dimanupulasi

Responding variable

Pembolehubah bergerakbalas

Controlled variable

Pembolehubah dimalarkan

Size of round bottom flask

Volume of water bath

[ 2 marks]

(e) Using Table 8.4, draw a graph of air pressure against temperature..

Menggunakan Jadual 8.4, lukiskan graf tekanan udara melawan suhu.

1 2

( f ) Based on the graph, state the relationship between the temperature and the air

pressure.

Berdasarkan graf, nyatakan hubungan antara suhu dan tekanan udara.

……………………………………………………………………………………………………………………………………

[ 1 mark ]

( g ) Based on the graph in ( e), predict the Bourdon gauge reading if the temperature is 00C.

Berdasarkan graf di (e), ramalkan bacaan tolok Bourdon bagi suhu 00C

..............................................................................................................................

[ 1 mark ]

(h) Define operationally the meaning of ‘ air pressure’.

Berikan maksud ‘tekanan udara’ secara operasi.

………………………………………………………………………………………………………………………………………

[ 1 mark ]

END OF QUESTIONS