Trial Perak Sains 2009

ST]LIT 1511/1 Science Paper I Sept. 2009 1% jam

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PEPERIKSAAN PERCUBAAN SIJIL PELAJARAN MALAYSIA NEGERI PERAK 2009

SCIENCE PAPER1 Satujam lima belasminit

JAI\GAI\I BUKA KERIAS SOALAN INI SEHINGGA DIBERITAHU I.

Kertas soalan ini adalah dalam dwibahasa.

2.

Soalandalam bahasaInggeris mendahuluisoalanyang sepadandalam bahasaMetayu.

3.

calon dikehendakimembacamaklumatdi halamanmuka surat 2.

Kertas soalan ini mengandungi22 halaman bercetak dan 2 halaman tidak bercetak

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INFORMATION FOR CANDIDATES MAKLUMAT UNTAK CALON

1.

This questionpaperconsistsof 50 questions. Kertas soalan ini mengandungi50 soalan.

2.

Answerall questions. Jawab semuasoalan.

3.

Each questionis followed by four alternativeanswers,A, B C and D. For each question, chooseone answeronly. Blackenyour answeron the objectiveanswersheetprovided. Tiap-tiap soalan diikuti oleh empatpilihan jawapan, iaitu A, B, C dan D. Bagi setiap kertasjawapan objektif yang disediakan.

4.

If you wish to changeyour answer,erasethe blackenedmark that you have made.Then blackenthe new answer. Jika anda hendak menukarjawapan, padamkan tanda yang telah dibuat. Kemudian hitamkanjawapan yang baru.

5.

The diagramsin the questionsprovidedare not drawnto scaleunlessstated. Rajah yang mengiringi soalan tidak dilukis mengikutskala kecuali dinyatakan.

6.

scientific calculator. You may use a non-programmable Anda dibenarkan menggunakankalkulator saintifik yang tidak boleh diprogram.

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Eachquestionis followed by four optionsA, B, C and D. Chooseone correctanswerfor each questionand blacken the corresponding spacein your objectiveaswer sheet. Setiapsoalan diifuti denganpilihan A, B, C dan D. Pilih satujawapan yang betul bagi setiap soalan dan hitamkan pada ruang yang sepadanpada lcertasjowapan objehif. 1

Diagmm1 showsthe path of impulsein a reflex action. Rajah I menunjukkanlintasan impuls dalam tindalmn refleks

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DiagramI Rajah I

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What areX, Y and Z respectively? Apalmhyang diwakili oleh X, Y dan Z? X Sensoryneurones Neuronderia Motor neurones Neuron motor Sensoryneurones Neuronderia Relayneurones Neuron perantaraan

Y

Z

Relayneurones Neuronperantaraan Sensoryneurones Neuronderia Motor neurones Neuronmotor Motor neurones Neuronmotor

Motor neurones Neuron motor Relayneurones Neuronperantaraan Relayneurones Neuron Derantaraan Sensoryneurcnes Neuron deria

Diagram2 showsa systemin a humanbody. Rajah 2 menunjukkansistemdalam badanmanusia.

Diagram2 Rajah 2

What is the system? Apalmhsistemtersebut? A Nervoussystem Sistemsaraf B Digestiveqystem Sistempencernaan 1511/1

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Thebelowstatements are disordenfrced by a patientdueto failureof one of his endoqineglands. Pernyataandi bawah merupakanmasalahyang dialami oleh pesakit akibat kegagalan fungsi salah satu daripada kelenjar endolrin. ' .

Glucoseis secretedin the urine Glukosa dirembeskandalam air kencing The patient is diagnosedwith diabetes Pesakit dikesan menghidapdiabetis

What is the endocrinegland? Apakah kelenjar endolcrintersebut? Thyroid Tiroid Pancreas Panlcreas

Pituitary Pituitari Adrenal Adrenal

Diagram3 showsa humancell. Rajah 3 menunjukkansel manusia.

Diagram3 Rajah 3

-Jr r * *

Namethe cell labelledX Namalransel yang berlabel X A B

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DNA DNA Gene Gen

Nucleus Nukleus Chromosomes Kromosom

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ST]LIT Diagrarn5 showsa cnossbreedingbetweentwo tall pea plants. Rajah 5 menunjukkan lwcuk silang antara dua polwk kacang pea yong tinggi Tall nnCCt K

Tall

nsgi t

Parent Induk

Diagram5 Rajah 5

First gencration Generasi peftama Tdl ngi

Tall Tingi

$

Tall Tinggi

* Dwarf Kerdil

What are the genesfor the parentsJ and K? Apakah gen bagi induk f and K?

J ATT BTT

K TT Tt

cTt

Tt Tt

DT

Whichftrtilisationb*ween spermandornnnwill form identicaltwins? yang manaknhantarq spermadan ovum alan membentukkembar seiras? Perserryavvaan

e_ re

B

Which changein stateof matter rcpresentscondensation? Antara perubahan keodaanjirim berikut, manakahyang mewqhili kondensasi?

Affi"'-r'lrffi

cm+ffi

B

Dffi* M

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Diagram6 showsan incompleteperiodic table. Rajah 6 menunjukkanjadual berlcalayang tidak lenglnp. I

ElementX is a ElemenX adalah A B

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C D

Senrimetal Separuh logam Semiconductor Semikonduktor

Purewatercanbe producedfrom pollutedwaterby Air tulenbolehdihasilkatn daripadaair tercemarmelalui A B

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Metal Logam Non-metal Bukan logatn

Diagram6 Rajah 6

boiling pendidihan distillation penyulingan

C D

evaporation penyejatan crysallisation penghabluran

The following information showsthe characteristics of materialX. Maklumat berikut tnenunjukkanciri-ciri bahan X .

Light weight Ringan

t

Shiny surface Permukaan berkilat

.

Used as food wrapper Digunakan sebagaipembunghts makan

o

Good heat conductor Konduktar haba yang baik

Whatis materialX? ApakahbahanX? A B

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Zirrc Zink Lead Plurnbum

c

Plastic Plastik Ahminhur Aluminium

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Which of the following is an endothermicreaction? Antara berikut yang manakahtindakbalas endotermik? A B C D

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Gamma-raycan be stoPPedbY Sinar gammaboleh dihalang oleh A B

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Photosynthesis Fotosintesis Combustionof fuel Pembakaranbahan aPi Ammoniumchloridesalt dissolvein water Garam ammoniumklorida larut dalam air Decompositionof coppercarbonateby heat Penguraiangararn kuprum karbonat oleh haba

C

A thick wood Kayu yang tebal A piece of paper Sekepingkertas

D

A Plurnbumblock Blok Plumbum An aluminiumsheet Kepingan aluminium

Diagram7 showsa blue light and a yellow light being projectedon a white screen. Rajah 7 menunjukkancahaya biru dan cahaya kuning dipancarkan ke atas skrin putih.

White screen Slcrinputih

Blue Biru

x Yellow Kuning

Diagrarn7 Rajah 7 What is the colour of X? Apakah warna bagi X? A B

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Cyan Sian Green Hijau

C D

White Putih Magenta Magenta

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The informationshowsa word equationof the Haberprocess. Maklumat menunjukkanpersamaanperkataan bagi proses Haber. Iron Besi Nitrogen +

X

Ammonia 200 atm 450"C- 500'C Diagram8 Rajah 8

What is X? Apakah X? A B

C

Chlorine Klorin Flourine Flourin

D

Oxygen Oksigen Hydrogen Hidrogen

t7 Diagram9 is a gaph which showsa type of immunity. Rajah 9 ialah graf yang menunjukkansejenis keimunan. Level of antibodiesin the blood Aras antibodi dalam dorah

Time (week) Masa (minggu)

lnfection of a disease Jangkitan penyakit Diagram9 Rajah 9 Namethe type of immunity? Namakanjenis keimunantersebut? A

Naturalactiveimmunity Keimunan aktif semulajadi

C

Naturalpassiveimmmity Keimunanpasif semulajadi

B

Artificial activeimmunity Keimunan aktif buatan

D

Artificial passiveimmunity Keimunanpasif buatan

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Diagram10 showsa stucture of bronze Rajah 10 menunjukkanstruktur gangsa Copper Ternbaga

Diagram10 Rajah I0 What is Y? Apakah Y? A B

19

C D

Nickel Nikel Carbon Karbon

Which non-metallocatedbetweenaluminiumand zinc in the reactivity series? Bukan lagam manakahyang berada antara aluminium dan zink pada siri kereaktifan? A B

20

Tin Timah Znc Zink

Oxygen Oksigen Hydrogen Hidrogen

C D

Carbon Karbon Sulphur

Sulfur

The diagram11 showsthe electrolysisof molten Lead (II) bromide.What occurswhen the switchis closed? Rajah II menunjuklmnelehralisis Plumbum(II) bromida lebur.Apa akan berlaku apabila litar lengkap?

Carbonelectrodes Elektrod karbon

Lead (II) bromide Plumbum(II) bromida

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Diagram1l Rajah II Positive ions move toward the anodeand gain electrons. Ian positif bergerak ke anod dan menerimaelektron Positiveions move toward the anodeand lose electrons. elektron Ian positif bergerakke anod dan membebaskan Positiveions move towardthe cathodeand gain elecfrons. Ion positif bergerak ke kctod dan menerimaelektron Positiveions move toward the cathodeand lose electrons. Ion positif bergerak ke katod dan membebaskanelektron [Lihat sebelah

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Which of the following is not a propertyof all meals? Manalrahdi antara berilan bukan sifat bagi semuajenis logam? A B C D

Shiny Berkilat Dissolvein water Larut dalam air Conductelecticity Konduktor elehrik Malleablewhen solid Boleh ditempa apabila berkeadaanpepejal

The sourceof energyof the sun is Sumbertenoga bagi matahari ialah A B C D

Nuclearfission Pembelahannucleus Chemicalreaction Tindak balas kimia Nuclearfusion Pelakuran nucleus Photoelectriceffect Kesan tindakan fotoelektrik

23 The substanceusedin the nuclearreactorat a nuclearpower station is Bahan yang digunakan dalam reaktor nuklear di stesenjanakuasa nuklear ialah A B

24

Cadmium Kadmium Radium Radium

C D

Uranfuun Uranium Thorium Torium

If a capital letter R is seenin a plane mirror, what doesit look like? Jika huruf R dilihat di dalam cermin satah, huruf itu kelihatan seperti?

c

B

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25 What is the characteristicof stainlesssteel? Apakah sifat keluli nilkarat? A B C D

High sreneth Keras dan kuat High ductility Tahan kemuluran High conosionresistant Tahan karat Brittleness Rapuh

26 Which of the following diseasesis causedby bacteria? Penyakityang manakahdisebabkanoleh bakteria? A B C D

AIDS AIDS Dengue Denggi Malaria Malaria Tuberculosis Tuberkulosis

27 The diagram 12 showsthe reproductionof a microorganisnis. Rajah 12 di bawah menunjukkanpembiakan milroorganisma.

ffi*m*ffiffi

Parentcell

Offspring

seJ'induk

sel anak

Diagram12 Rajah 12 What is the methodof this t.p*4t .tiont Apakahjenis pembiakantersefiat? .-'. 't : , I

1 .."

Budding Pertunasan Binary fission Belahan dedua Cor{ugation Konjugasi Sporeformation Pembentukanspora

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13

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Tim is a famousartist. Shehas the following symptoms Tim adalah seorang artis. Dia mengalamisymptomseperti berikut: Avoid eating Mengelak dari makan Always thinking that sheis fat Beranggapanbahawa dia seorangyang gemuk Is anaemicand undernourished Kekurangan darah dan tidak cukup zat What is the diseasethat she is sufferingfrom? Apakahjenis penyakit yang dihidapinya? A B C D

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A paddyplant is known as a producerbecauseit can Padi dikenali sebagaipengeluarkeranaia boleh A B C D

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High blood pressure Tekanandarah tinggi Anorexia nervosa Anorelcsianervosa Diabetes Kencingmanis Obesity Kegemukan

Use oxygen Menggunakan oxygen Carry out photosynthesis Menjalankanfot osi ntesis Absorb nutrientsfrom the soil Menyerapnutrisi dari tanah Producecarbondioxide Menghasilkankarbon dioksida

Which of the following gasescontributesthe most to the greenhouseeffect? Yang manakah gas berikut yang menyumbangkan paling banyak kepada kesan rumah hijauT A B C D

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Sulphurdioxide Sulfur dioksida Carbondioxide Karbon diolcsida Nitogen dioxide Nitrogen dioksida Carbonmonoxide Karbon monoksida

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Diagram13 strounpart of a nitogen cycle. Rajah 13 menunjukknnsebahagiandari kitar nitrogen. Which of the following A, B, C or D is the part wtrercdenitifying bacteriafunction? Antara bahagianA, B, C atau D di manalwh baheria pendenitritan berfungsi? Nitrogen in the atnosphere Nitrogen di atmosfera Plants tumbuhan

Nitratesin the soil Nitrat dalam tanah Diaeram13 Rajah 13

32 \Iihat is the functionof ctrlorophyll? Apalwhfungsi HoroJil? A

B

C

D

Absorbslight enerryto breakcarbondioxideinto carbonand orygen Menyerap tenaga cahaya untuk menukarkanknrbon diolcsida kepada karbon dan oluigen. Absorbslight energyto breakwatermoleculesinto orygen gasand hydrogenions Menyerap tenaga cahaya untuk menukarkanmolehtl air kepada oksigen dan ion hydrogen. Absorbslight enerryto combinewatermoleculesand carbondioxideto form starch. Menyeraptenaga cahaya untuk menggabunglcan molehi air dan knrbon dioksida bagi pembentukankanji. Absorbslight energyto combinewater moleculesand oxygento form starchand carbon dioxide Menyerap tenaga cahaya untuk menggabungkanmolekul air dan olcsigenbagi pembentuknnkanji dan lcarbondioksida.

33 The dangercausedby poisonousand toxic gasreleasedinto ttre air can be reducedby Bahayayang disebabkanoleh gas toksin dan beracunboleh dihtranglcandengan A B C D

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Closingdown the factories Menutup Hlang-Hlang llave the factoriesbuilt in areasfar from the residents. Membina kilang-kilangjauh dari kawasanperumahan. Allowing the factoriesto releasethe gasonly in the night. Membenarlcan kilang-kilang untuk rnembebaskan gas tersebuthanyapada waWumalam. Havingthem filteredand chemicallyfreatedbeforereleasingthe gas. Mempastiknngas-gastersebutditapis dan diravtat secara kimia sebelumdibebasknn

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34 Diagrarn14 showsa crosssectionof an oil palm fruit. Rajah 14 menunjukkankeratan rentas buah kelapa sawit.

w

Diagram14 Rajah 14 Choosethe correct answerthat represent\il, X, Y and Z. Pilih jmapan yang betul untuk mewakili W X, Y dan Z.

w

D 35

x

Y

Z

Exocarp eksokap

Mesocarp mesokap

Endocarp endoknp

Kemel kernel

Mesocarp mesokap

Exocarp elcsokap

Endocarp endokap

Kernel kernel

Exocarp eksokap

Mesocarp mesokap

Kemel kcrnel

Endocarp endokap

Mesocarp mesokarp

Exocarp eksokap

Endocarp endokap

Kemel kernel

Diagmm 15 showsa soapmoleculesfructure. Rajah 15 menunjukkanstruktur molekul sabun.

Diagrarn15 Rajah 15 The following statementis the correctexplanationabout Diagram 15 except Antara peryataan berihtt adalah benar tentangpenjelasan untuk Rajah 15 kccuali A B C D

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X is known as llydrophilic head X dikenali sebagai Hidrofilik kepala Y dissolvesin water and organicmaterial Y larut dalam air dan bahan organik X is also known as ionic head X jugo dikenali sebagai kepala ianik Y is knov,n as Hydrophobictail Y dikenali sebagoi Hidrofobik ekor

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except 36 Excessiveconsumptionof saturatedfat"th4y causethe,following''diseaseto our heatth :'" Lebihan memakai lemak tepu akan menyebabkan'penfadtb?rihtt kecuali .

Strok

B C D

High blood pressure Tekanandarah tinggi Heart attack Seranganiatung Cancer Kanser

,.

- .- ..,,

I

a'

, :i

:

37 Diagram 16 showsa structureof cross-linkagein.vulcanizearub!e_,r,,f91t.{?

najah 16 menunjukkanstrqhur rangkaian silang dalam molgkul,lervulkan getah.

I I

Diagram16 Rajah 16 What is X? ApakaihX? A B C D'

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Sulphw Sulfur Chloride Klorida Protein Protein Sodiirm' Naffium

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Diagram 17 shows a section of a tape with print dots. A ticker timer connectedto an a.c supply 50 Hz was used to measurethe velocity of a toy car moving with constantvelocity. Rajah 17 menunjukkansebahagianpita dengan cetak titik-titik. Satujangka masa detik disambungke satu bekalan a.c 50 Hz adalah digunakan untuk mengukur halaiu satu kereta mainan bergerak derlganhalaiu malar. tl r-l

i<-

bCm

4r

1....1o.. Diagram17 Rajah 17 Calculatethe velocity of the toy car. t-l distancetravelledI l-, . .. l Ve l o cl rY :-l time taken I I Kirakan halaju kereta mainan. l-'l

lu*o1uI A B 39

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30 cm s-r 40 cm s-r

C D

50 cm s-r 60 cm s-t

A truck travelingat a constantspeedon a straightroad increasesits speedfrom 8.0 ms'l to 20 ms'rin 12 seconds.Determinethe accelerationof the truck. | ^ , .. - change in u.tocityl l Ac c e le ra ti o n --i time taken J I Satu trak menjelajah pada satu kelajuan malar di satu ialan lurus meningkat kelajuannyadaripada 8.0 ms'r ke 20 msr dalam masa 12 saat. Tentukanpecutan trak tersebut. [

, , .-,-' pecutanl I nerubahan l Pe c u ta n =' I diambil masa I I

A B

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C D

10.0ms-2 7.0 ms-2

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of momentum. Diagram18 showsa Newton'scradlefor principleof conservation Rajah 18 menunjukkansatu buaian Newton untukprinsip keabadianmomentum

Diagram18 Rajah 18 How many balls will go up on the right side of the cradleif 2 balls on the left side are released? Berapa biji bola akan bergerak pada sebelah kanan buaian jika 2 biji bola pada sebelahkiri dilepaskan? A B

4l

C

1 ball I biji bola 2 balls 2 biji bola

D

3 balls 3 biji bola 4 balls 4 biji bola

Diagram19 showsthe forcesactingof an aeroplanewhen it is in flight. Rajah 19 menunjukkandaya-dayayang bertindak ke atas sebuah kapal terbang dalam penerbangan.

W Y €

$

-t

z

Diagram19 Rajah 19 Choosethe correct answerthat representW' X, Y and Z. Pilih jawapan yang betul untuk mewakili W X, Y dan Z.

D

tstul

w

x

Y

z

Crravity Graviti

Tnrst ftjah

Drag Heret

Uft Anglut

Lift Angkat

Drag Heret

Cilavity Graviti

Trust Tujah

Trust Tujah

Crravity Graviti

Lift Angkat

Drag Heret

Drag Heret

Uft Angkat

Trust Tujah

Cravity Graviti [Lihat scbelrh ST]LIT

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The information showsa food processingmethod. Maklumat menunjuklransatu kaedahpemprosesanmakanan. ' ' '

Drying underthe sun Kering di bawah matahari Drying in an oven Kering didalam ketuhar Drying over a flame Kering di atas api

The food processingmethod aboveis Kaedahpemprosesanmakanandi atas ialah A B

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Pasteurization Pempasteuran Irradiation Radiasi

C D

Canning Pengetinan Dehydration Pendehidaratan

Diagram20 showsthe picture of the founderof bacteriology. Rajah 20 menunjukkansebuahgarnbarpengasasbagi baheriologi.

Diagram20 Rajah 20

Who is the man developedpasteurization? pempasteuran? Siapakahbeliau yang rnengembangkan A B

Edward Jenner AbrahamGrahambell

C D

Sir IsaacNewton Louis Pasteur

What is the correctstatementof the bottled drink in the diagram2l belov/?The bottled drink Apakahpernyataanyang betul bagi sebuahbotol mtnumandi dalam Rajah 21 di bavtah? Botol minumantersebut

: 01.10.2008 :21.10.2O10 Diagram2l Rajah 21

A B

c D

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can be consumeduntil 23 I lA | 2010 boleh diminumsehinggtarikh 23 / 10 / 2010 is spoilt telah rosak is safe to be consumed selamat untuk diminurn expiry date is 0l/10 I 2008 Tarikh luput ialah 01 / I0 /2008 [Lihat sebelah ST]LIT

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ST]LIT Diagram22 showsa symbol. Rajah 22 menunujukkansatu simbol.

ffi

Diagrarn22 Rajah 22

The symbolrefers to Simbol itu merujuk kepada A B

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Reuse Menggunakansemula Recycle Kitar semula

c D

Reduce Kurangkan Refresh segarkan

Pn Ani usedto throw plasticsinto the river behindher house. Pn Ani selalu membuangsampahke dalam sungaiyang berdekatan.

Pn Ani 's actionis irresponsible. TindakanPn Ani itu tidak bertanggungiawab. What is the bestway to throw plasticsthat can be practisedby Pn Ani? Apakah kaedahyang paling terbaik untuk membuangsampahyang boleh diteladani oleh Pn Ani? A B C D

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plastics Use biodegradable Menggunakanpl ast ik yang boleh dibiodegr adasikan Bury in the sand Tanamdidalam tanah Throw rubbishin anotherriver Membuangsampahke dalam sungai yang lain Burn the plasticsin openarea Membakarplastik di tempatyang terbuka

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Tableshowsthe differencesbetweensyntheticplastics. Jadual menunjukkanperbezaandiantara plastic sintetik .

X

Y

'

Low melting point Takat lebur rendah

.

'

No crosslinkage Tiada rangkai silang

'

Has crosslinkage Ada rangkai silang

'

Low resistanceto heat Rintangan haba lemah

t

High resistanceto heat Rintanganhaba tinggi

High meltingpoint Takat lebur tinggi

The productsmade from X and Y are ProdukX dan Y di perbuat daripada

x A B C D

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Melamin Memelamin Polystyrene Polisterin Polystyrene Polisterin Polyvinylchloride Polivinilklorida

Y Epoxy resin Resinepoksi Perspex Perspeks Bakelite Bakelit Polythene Politena

Diagram23 showsan exampleof a wavein one second. Rajah 23 menunjukkansatu contoh gelombangdalam satu saat. Displacement

Distance Jarak

Diagram23 Rajah 23 How manycompleteoscillationshavebeengenerated? Berapakahbilangan putaran lengkapyang terhasil? A5 B 5.5 C6 D10

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What is the type of wavesusedin the handphone? Apalmhjenis gelombangyang digunakandalam telefon bimbit? A I i

B

r l

l

Ulta viola Utra violet Visiblelight. Cahaya nampak

Microwave Gelombangmilvo Gammaray Sinar gamma

50 Diagrafir24 showsa radio tansmissionsystem. Rajah 24 menunjukkansebuahsistemradio pemancar. Oscillilator Osilator

Modulator Modulator

X Dia$arn 24 Rajah 24 Whatis the functionof X? Apalrahfungsi X? A B C D

Audio signalsarecombinedwith radiowaves Gelombangradio bergabungdenganisyarat audio Separates audiosignalfrom radio waves Mengasingkanisyarat audio dengangelombangradio Producesradio waves Menghasilknngelombangradio Convertssoundwavesinto electical signals Menukarkangelombangbunyi kepadaisyarat bunyi

END OF QUESTION PAPER KERTAS SOAI./IN TAMAT

tstul STILIT

STJLIT '511N 15flN Sains Kertas 2 Sept. 2009 2 %j a m

NAMA:

ANGKA GILIRAN:

PEPERIKSAAN PERCUBAAN SIJIL PELAJARAN MALAYSIA NEGERI PERAK 2009

SCIENCE PAPER2 Duajamtigapuh:hminit

JAIYGAI\ BI]KA KERTAS SOALAII INI SEHINGGA DIBERITAHU L

Tuliskannama dan angka giliran andapada ruang yang disediakan.

2.

Kertas soalan ini mengandungitiga bahagian: BahagianA, BahagianB dan BahagianC.

3.

Jawab semuasoalan dalam Bahagian A dan BahagianB. Bagi BahagianC, jawab Soalan l0 dan mana-manasatu daripada Soalanll atau Soalan12.

4.

Jawapan hendaklah ditulis denganjelas pada ruang yang disediakan dalam kertas soalan.

5.

Rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali dinyatakan.

6.

Markah yang diperuntukkan bagi setiap ceraian soalan ditunjukkan dalam kurungan.

7.

Anda dibenarkan menggunakankalkulator saintiJik yang tidak boleh diprogram.

8.

Masa yang dicadangkan untuk menjawab BahagianA ialah 60 minit, BahagianB ialah 50 minit dan Bahagian C ialah 40 minit.

Kod Pemeriksa

Bahagian Soalan

A

2 J

B

C

4 5 6 7 8 9

Markah Markatr Pemh Dperolehi 5 5 5 )

6 6 6 6 6

10

r0

11

t0

t2

l0 Junlatl

Kertas ini mengandungi22 halaman bercetak dan 2 halaman tidak bercetalc

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2 SectionA Bahagian A [20 marks] 120markahl Answerall questionsin this section Jawab semuasoalandalam bahagianini

DiagramI showsan experimentto studythe reactivityof metals.The reactivityof metalscanbe determinedby the reactionbetweenmetaland dilute acid.Five differentmetals:calciurn,copper, zinc, tin andnickel are addedto dilute hydrochloricacid respectively. The heightof gascollected in the first 25 secondsin eachcaseis measured. Rajah I menunjukkaneksperimenuntuk mengkaji kereaktifanlogam. Kereaktifan logam bolehditentukanmelalui tindakbalaslogam denganasid cair. Lima logam yang berbeza, kalsium, kuprum, zink, timah dan nikel dimasukkansecara berasinganke dalam asid hidroklorik cair Ketinggiangas yang terkumpulpada 25 saatyang pertamabagi setiap logam diukur Deliverytiub Tiubpenghantar

Dilute hydrochloricacid Asid hidroklorik cair

Heightof gascollected Ketinggian gasyang terkumpul

I / I

Water Air

Metal Logam Diagmm1 Rajah I The resultsare shownin Table 1.1. Keputusaneksperimenditunjukl
Height (cm) of gas collected in the first 25 seconds Ketinggian (cm) gas yang terkampul pada 25 saat yang pertama.

Calcium Copper Kalsium Kuprum

5.5

I

Zirrc Zink

Tin Timah

Nickel Nilel

4.5

0

2.5

Table1.1 Jadual1.1

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(a) Basedon the result in Table 1.1, draw a bar chart to show the height of gascollected againstthe type of metals. Berdasarkankeputusandalam iaduat LI, lukiskan carta bar yang menunjukkan Icetinggiangas yang terlatmpulmelawanjenis logam. Heightof gascollected(cm) Ketinggian gas yang terkumpul (cm)

Calcium Kalsium

Cuprum Kuprum

Tin Timah

Nickel Nikel

Typeof metal Jenis logam [2 marks] 12marknh)

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(b) What is the relationshipbetweenthe heightof the gascollectedandthe typesof metals? Apalrahhubunganantara ketinggiangas yang terkumpuldenganjenis logam? [1 mark] ll markahl (c)

Anangethe reactivityof four metalsin descending orderfrom the resultin table 1.1 Susunkankereaktifanempat logam sahaja, mengikut urutan menurun berdasarkan lreputusanelcsperimen pada jadual LL

Reactivitydecreases Kereaktifanmenurun

[2 marks] [2 markah]

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Dagram2.1 showsan experimentto studythe formationof an imageby a planeminor. Rajah 2.1 menunjukkaneksperimenbagi menglwjipembentulwnimei pada cerminsatah

.(:)w: ":;;;c.... 1I

i

I

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observer

Pemerhati

Diagram2.1 Rajah2.1

(a) CompleteDiagram2.1by drawingthe ray diagramto showlight rayson the planemirror. Lenglwpkan Rajah 2.1 dengan melukis gambar rajah sinar bagi menunjukknnsinar cahayamelalui cermin satah. [2 marks] 12marlahl (b) Whatlieht pnncipleis appliedin the planemirror? Apalwh prinsip cahayayang diaplilrasikandalam cermin satah?

[1 mark] [1 marlahl

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SULIT (c)

in front of a planemirror. Their positionsare shown Four students:R Q, R, S are arrang,ed diagram by DiagramZ.Z. TIteimageof eachstudentis alsodrawnon the diagmm.The ray showsthaLP cannotobservethe imageof S'' mereka Empat orang pelaiar: n g, R, S diiusun dihadapancermin satah. Keduduknn raiah. ditunjulCwn-aAni Rqjahi.Z. tmei setiappelaiar iuga tetah dituniukkandi dalam Rajah sinar menuniukkanbahawa,P tidak dapat melihat imej S'. P' *

Studentsimage Imej pelajar

;

*

*

s'

R'

Q'

Planemirror Cermin satah

il a

*

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R

S

Ligfit rays sinnr cahaYa Students pelajar

Diagtam2.2 Raiah2.2

G)

S? Basedon the diagrarn2.2 prdicttwo imagesof studentsthat canbe seenby BerdasarlcanRaiah 2.2 rimatlan imei dua orang pelajar yang dapat diperhatiknn oleh S?

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I1 markahl

G) Nameone characteristicof imageformedby theplainminor. Nyatalransatu sifat imei bagi cermin satah'

[l mark] l1 marknhl

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Diagam 3.1 showsan o
X

Y

Z

1.8

3.0

2.5

Table2 Jadual 2

Peti dish Piring peni

%

NufiientAgar Agar nutrien

Diagram3.1 Rajah3.1 (a)

What is tlre hlpotresis of this erryriment? Apalwh hipotesisbagi eksperimenini?

[1 mark] ll markahl (b)

vriable in this experiment. Stateore methodto fix the con:trolled Nyataknn satu knedah,untuk rnenetapkanpemboleh ubah dalam eksperimenini. [1 mark] 11 marl
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With referenceto table2, wtrichdisc hastlre highestconcentationofonicillin? Merujuk lcepadajadual 2, ceper manalrahmempunyaikepekntanpenisilin yang paling tinggi? [1 mark] [1 markahl

definitionof penicillin (d) Penicillinis an antibiotic.Basedon ttrisexperimen!statethe operational rryatakan deJinisisecaro Penisilin adalah sejenisantibiotilc Berdasarkaneksperimenini, operasibagipenisilin.

I mark] [1 markah] M, N, O and P are microorganisms. M, N, O dan P adalah microorganism,

o

N

M

$ P

Diagnrn3.2 Rajah3.2 that can be destoyedby (e) Basedon diagram3.2 tick ( / ) to showthe microorganisms penicillirl Berdasarftandiagram 3.2, tandakan( / ) bagi menunjukkanmilvoorganismayang bagi yang boleh dimusnahkanolehpenisilin. menunjuklanmilcroorganima Mooorganisms (mikroorganisma)

Canbe destoyedby penicillin (Boleh dimusnahkanolehpenisilin)

M N

o P

[1 mark] l1 markahl

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Diagrarn4 showsan experimentto studyBemoulli'sprinciple. Rajah 4 menunjukkansatu eksperimenuntuk mengujiprinsip Bernoulli

Directionof air flow Arah pengaliran udara Diagram4 Rajah 4 (a) What is the relationshipbetweenthe speedof water and presswe. Apalrah hubungandi antara kelaiuan air dengantekanan.

ll markl I marlwhl O)

Draw the waterlevelsin the Bemoullitube Q, R and S LuHs aras air dalam tiub Bernoulli

[2 marks] 12 marlwhl (c)

Which tubeproducesthe highestpressure? Tiub yang manakahaknn menghasillwntekananyang paling tinggi?

[1 mark] ll marlahl (d)

Stateone applicationof Bemoulli'sprinciplein our daily life. Nyatakansatu aplikasi prinsip Bernouli dalam kehidupanharian.

[1 mark] I marlwhl

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Diagam 5 showsstagesof a cellldivisisni,{*." in hrinar beingduringthe fomrdion of babies. Rajah 5 menunjutckanperinglqt pembb$agian sil',yang berlaht dalam manusia sernasa p e m b e n t uka n b a yi . ;: , "i :Sji:vV :; r i- .

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Diagranr5

' [2 marlul [2 markahl p occurs. Statethe organwhereprocess ',l;c;.1b}1 i::'u*"rr:r')Nyatalwnorgandi manaproses P berlalw.

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Statethe typeof twins basedin Diagram5. Nyatakanjenis kembar dalam Rajah 5.

ll markl ll markahl (d) Give one similarityin babyA andB. Beri sata persamaetft pada bqti A dan B.

fi markl l1 markahl (e) If a spermtbat caniesthe X
ll markl ll marlwhl

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Diagram6 showsthe life cyclesof the femaleAnophelesmosquitoand femaleAedesmosquito. Rajah 6 menunjuklwnkitar hidup bagi nyamukAnophelesdan rryamukAedes. Eggs Telur

P Stage

IfiDV l:

Peringknt P

W: (a) Namethe stageP shownin diagrart6 Namalmnperingknt P seperti yang ditunjukkan dalam raiah 6

ll markl [1 markah] mosquitoesknown as vectors? o) Why arethesenyamuk dikBnalisebagaivehor? Mengapalmh

I mark] l1 markahl (c)

featureof an adultAedesmosquito. Stateone characteristic Nyatalan satu ciri nyamukAedesdewasa.

(1 markl II markah]

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(d) What is the pathogenthat is spreadby Anophelesmosquitoes? Apatrahpatogenyang disebarknnoleh rryamukAnopheles?

ll markl I t martrahl mosquitoes. spreadby Anopheles Statetwo stepsto preventthe diseases yang olehnyamukAnopheles. penyakit dibawa Nyatalmndua langkahuntukmencegah

[2 marks] 12marlwhl

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Diagram7.1 and 7.2 showstwo differenttypesof food products. Rajah 7.1 dan 7.2 menunjulckan duajenis malwnan.

(a)

Meat andfish Daging dan ikan

Condensed milk Susupekat

Diagram7.1 Rajah 7.1

Diagnm 7.2 Rajah 7.2

Statettre categoryof fat in diagram7.1 and diagam 7.2. Nyatakankntegori lemakyang terdapatdalam rajah 7.1 dan rajah 7.2. Diagram7.1 Rajah 7.1 Diagnm 7.2 Rajah 7.2 [2 marks] 12 marlmhJ

@) Give two propertiesof fat basedon the answerin diagam 7.1 jawapan anda di 7.1 Berikon dua ciri berkaitanlemakberdasarkan

[2 marks] [2 markah]

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Diagram7.3 showsan obeseyormgboy. He had a heartattack. Rajah 7.3 menunjukkanseorangbudakyang gendut.Budak itu mengalami serangan jantung.

Diagram 7.3 Rajah 7.3 The excesscholesterol sticks to the walls of the arteriesmakine the lumen narower. This condition is known as Lemak berlebihan leknt didinding arteri dan menyebabkanruang lumen sempit. Kesdaan ini dikenali sebagai

I mark] markah] II (d) Whatis X in the dragramT.4? ApakahX didalam rajah 7.4?

Diagrarn7.4 Rajah 7.4 [1 mark] II marknh]

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Diagram8 showsfoodsthat havebeenprocessed throughdifferentmethods. Raiah 8 menunjukkanmaknnanyang telah diprosesmelalui knedahyang berlainan.

g{aao ffiiafir

#ffi x Dagmm 8 Rajah 8 (a)

Namethe food processingmethodfor X and Y. Namalranlraedahpemprosesanmakananuntuk X dan X

[2 marls] [2 marlmh] O)

Mark (/) for the suitabletemperature neededfor pasteurization Tanda(,f) bagi suhu yang diperlukan untukprosespempasteuran. 63oCfor 30 minutes

(c)

(d)

72"C for 30 minutes

Give one disadvantage of processY. Beri sata keburukanproses Y.

72"C for 15 seconds

[1 mark] ll markahl

tl ma*l I markahl

Give anotherexampleof processed food usingmethodX. Beri contohmalcananlain yang menggunakan kaedahpemprosesanmakananX.

I mark] II markah] (e) Nametwo informationthat must havein a food labelaccordingto FoodRegulation1985. Namalrandua informasi yang perlu ada pada label makonanberdasarknnPeraturan Makanan 1985.

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Dagram 9.1 showsa spectum of electomagneticwaves Rajah 9.1 menunjukkanspehrum gelombangelehromagnet Mcrowaves Gelombang milqo

x

Vsible

tdr Cahaya nampak

Ulta violet Utra violet

X- r ay Sinar X

Y

(a) IdentifyX andY Kenal pasti X dan Y

G ) xY. [2 marks] 12markahl (b) Arrangethe elecfromagnetic wavesin orderof decreasing frequency. Susunlrangelombangeleknomagnetikberdasarlanfrehtensi menurun. Frequency Frehtensi

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Dagrarn 9.2 showsa radio wave"Whd i$ R.and S? getrombang Rajah 9.2 me'nunjulckon radto. Apakah R dan S? Displrcernentcn Sesaran

Distarc,e,cm Jarak

Diagram9"2 Rajak9.2 (i) RS[1 r,nark] II mwkahl D d rE R i n c(i ) TalviJkanRdalatnc(t) R

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SectionC Bahagian C [20 marks] [20 markah] AnswerQuestion10 and Questionll or euestron 12 lawabSoalanl0 dan samaada Soalanll atau Soalan12 10. Studythe following statement. Kaji pernyataan berikut. Reaction of metal and acid releasesheat energyto the surroundings. Tindakbalaslogam dengan asid membebaskantenoga haba ke seketittng.

You are given boiling tube,boiling tube rack, spatula,25ml measuringcylinder,thermometer, powderedzinc and powderediron. Anda dibekalkandengantabung didih, rak tabung didih, spatula,silinder penyukat25m1, jangka suhu,serbukzink dan serbukbesi. (a)

Suggestonehypothesisto investigatethe abovestatement Cadangkansatu hipotesisuntuk menyiasatpernyataandi atas.

[1 markJ II markah] (b) Describeone experimentto test your hypothesisin 10(a)basedon the following criteria: Huraikon satu el<sperimen untuk mengujihipotesisdi I1(a) berdasarkanlviteria berihtt:

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(D Aim of the experiment Tujuaneltsperimen

[2 marks] [2 marknh]

(ii) Identificationof variables Mengenalpas ti p embolehubah

[1 mark] lI markahl

Cu) List of apparatusandmaterials Senarairadas dan bahan

[4 marks] [4 marknhl

(iv) Procedureor method Proseduratau kaedah

I mark] II marlmhl

(v) Tabulationof data Penjadualandata

I mark] ll markahl

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which is causedby gasX. Diagramll showsa phenomenon Rajah 11 menunjuklwnsatufenomenadisebabkangas X. Sur Matahari Layer of gasP Lapisan gas-P

I

Sur ray Sinar matahari

Diagrartll Rajah 11 (a)

which is causeby gasX? Explainthe phenomenon Jelaslanfenomenayang disebabkanoleh gas X?

[a marks] 14 marlahl (b) A student is concernedwith the increasein temperaturein the city he lives in. As a responsiblestudent,describethree stepsthat he can take to reducethis problem.Your answershouldinclude: Seorang pelajar menyedari masalah peningkatan suhu di bandaraya tempat tinggalnya. Sebagai seorang yang bertanggungiawab,gambarlmn tiga aspek yang perlu untuk mengurangkanmasalahpeninglwtan suhu itu. Jawapan anda hendaklah mengandungi: (r) The causeof the increasein temperahre. Berilranpunca suhu meningkat.

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'sflN Give one reasonto this problem. Beriknn satu sebabterjadinya masalahini.

[2 marks] [2 markah] Give three stepsto be takento overcomethis problem. Berilran tiga langknh untuk mengatasimasalahtersebut.

[3 marks] [3 markah]

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(a) Explainthe differencesbetweenthermosetandthermoplastic Terangkanperbezaandiantara termosetdan termoplastik

[a marks] 14marlmhl (b) Diagrani12 showsobjects.made of thermosets. Rajah 12 menunjuklan objek yang dihasilkon daripada termoset.

TIIERMOSETS melanine

Bakelit Bakelit Diagram12 Rajah 12

Studythe objectsin Diagram12 andconstuctthe conceptof thermoset Kaji objek objek dalam Rajah 12 dan bina konseptermoset. Your answershouldbe basedon the following aspects: Jawapananda hendaklahberdasarkanaspek- aspekberikut: .

of thermosets Identifytwo commoncharacteristics Kenal pasti dua ciri sepunyabagi termoplastik

[2 marks] 12 markahl

.

Constructtlre initial conceptof thermosets Membinakonsepawal bagi termoset

I mark] marlah) [1

.

and a non Give anotherexampleof thermosets - exampleof thermoplastik Beri satu lagi contohlain bagi termosetdan satu bulwn contoh bagi termoplastik

12 markahl

Consffuctthe acfualconceptof thermoset Membinakonsepsebenarbagi termoset

[1 mark] lI marlmhl

r

[2 marks]

END OF QUESTION PAPER KERTAS SOAI-/IN TAMAT

tslu2 ST}LIT

SULIT 1s11/2(PP) Science Paper2 Marking Scheme September 2009

PEPERIKSAANPERCUBAAN SIJIL PELAJARAN MALAYSIA NEGERI PERAK 2009

SCIENCE PaperI and 2 MARKING SCHEME

UNTUK KEGUNAAN PEMERIKSA SAHAJA

pemarkahan Peraturan ini mengandungihalamanbercetak pihat sebelah

2

ls11/2(PP)

PAPER1 Marking Scheme

ID 2D 3C 4B 5A 6C 7B 8A 9D

1 0c

1s11/2(PP)

1l

t2 13 t4 l5 16 t7 18 l9 20

B D A

c

C D A A C C

2tB 22C 23C 24B 25C 26D 27A 288 29B 30B

3lc 32C 33D 34C 358 36D 37A 38D 398 40B

4tD 42D 43D 44C

4 sB 46A 47C 48A 49A 50D

SULIT

PEPERIKSAANPERCUBAAN SIJIL PELAJARANMALAYSIA 2009 SCIENCE_ PAPAE2 PERATURAN PEMARKAHAN SECTIONA Mark Question Marking criteria No (a) Able to draw a bar chart I Bar chart I Correctheiehtof bar ( onewrongno mark ) 1 (b) Able to statethe relationship The more reactivethe metals, the higherthe amount I of gascollected (c) Able to arrangethe reactivityof 4 metalsaccordinely

Total marks

2 1

Calcium,Zinc, Nickel, Copper,Tin Reactivitydecreases Note ( all correct2 marks) (2/3 conectI mark )

Question Marking criteria No

2

2

2

Total

5

Mark

Total marks

(a)

planemirror cerminsatah observer pemerhati

(b) (c)

l.Light rays from obiectto observer 2.Lieht raysfrom line from planemirror to imase Able to statetheprinciple Reflection/ reflect (i) Able to predictcorrectly Qa n d R

1 I

2

I

I

I

Note 1. 1 correct:0 mark 2 .2 conect: lmark (ii) Able to give the characteristic Virtual / laterally inverted I upright I Object size : image size/object dist ance = image distance

2

Total

5

Mark

(a)

The more concentratedpenicillin is used the larger diameterof clear areais obtained.

I

Total marks I

(b)

Sizeof penicillindisc

1

1

(c)

DiscY

I

1

(d)

that makesthe surroundingareaof the A substance thepenisilindisc clear.

I

I

(e)

NandP

Question Marking criteria No a J

MarkinsCriteria

Question 4 (a)

I

I

I

Total

5

Mark

E Mark

Able to state the relationship betweenthe speedof water and the pressure correctly

I

I

2

2

Sampleanswer 1. The higher the speedof air flow, the lower the air pressure. 2. The speedof water increase,the pressurein the water decrease.

(b)

Able to draw the water levels accuratelv r"r

l{

Direction-

of water 1l Note 1. 3 levelscorrect-2 marks 2. 2 levelscorrect- 1 mark

\

3. 1 level correct- no mark (c)

Able to state the highest pressure glass tube correctly

I

I

I

1

S

(d)

Able to statethe applicationof Bernoalli'sprinciple in daily ffi comectly Sampleanswer 1. Air flight 2. Insectspray 3. Bunsenburner of a car 4. Carburetor Note answer Eitheroneof the answeror otheracceptable

f,

SECTION B Mark

Question Markingcriteria No (a) P - Meiosis 5

(b) (c) (d)

Total marks

1

Q - Mitosis

I

2

Ovarv Identicaltwins Sampieanswers

I I I

I

I Total

I 6

Mark

Total marks

1 I

l.share one placenta 2.have identicalchromosomesand genes 3. have samesex both boysiboth girls 4. similar characteristicfeatures (e)

Girl / female

Markinscriteria

Question No 6

(a)

larva

I

I

(b)

from /diseases transmitpathogens Thesemosquitoes people patientsto healthy

I

I

(c)

Has black stripeson the abdomenand legs.

I

1

\

(d)

Plasmodium

(e)

Sampleanswers (i) Spray ponds , drains and stagnantwater with oil to prevent larva from breathing at the surfaceof water

I

1

2 Total

2

Mark

Total marks

(ii) Carry out fogging or sprayinginsecticidesto kill adult mosquitoes (iii) Sleepunderrnosquitonet (iv) Clear the housecompound from empty tins and containerswhich can hold stagnantwater. (v) Fix wire gauzeat the doors and windows to preventmosquitoesfrom getting into the house. (Accept any other relevantanswers)

Question Marking criteria No (a) 7 I Saturatedfat (ii) Unsaturatedfat (b) (i) Derived from animal (ii) Higher melting point

( c) (d)

Question 8 (a)

Sampleanswers 1. mostly solid at room temperature 2. raisetotal cholesteroland LDL ( bad cholesterollevel ) Atherosclerosis cholesterol

Markine Criteria

I I

2

I I

2

I

I Total

Mark

I I 6

I Mark

Able to name the type of food processing method accurately X: Dehydration Y: pasteurizatian

(b)

6

Able mark ( 4 -for the temperatureneededfor r pasteurization correctly

I I

2

1

I

63oCfor 30 minutes

72oCfor 30 minutes

72oC for lS seconds

Note 1. 2conecL- l mark 2. I correct- no mark (c)

Able to state the disadvantages of pasteurization.

I

I

1

I

I

I

Sampleanswer l. The pasteurized milk is not sterile 2. bacterialsporesare not kill 3. Pasteurizedmilk can be keepfor few days only in cold conditions 4. Foodsdoesnot last long 5. Foodsneedto be keep in refrigerator Note Either one of the answeror other acceptableanswer

(d)

Able to name the type of processedfood correctly. Samoleanswer 1. Dried fish 2. coffee powder 3. milk powder 4. groundnuts 5. instantnoodles Note Either one of the answeror other acceptableanswer

(e)

Able to name the information neededon thefood labels. SampleAnswers l' name and addressof manufacturer 2. nameI type of food 3. expiry date 4. ingredients 5. net weight Note Either one of the answer

6

I

Question Marking criteria No (a) (i) Radio wave 9 ii) Gamma ravs (b) Gammarays ,X- rays , visible light,microwave and (c) (c)

radio wave (i) X - wavelength (ii) Y - amplitude

Total marks

I I

2

I

I

I

The distancebetweenanypoint andthe next identical pointll The distancebetweentwo consecutive crests or betweentwo consecutive troughs

Question Marking criteria No

10

Mark

(a)

Able to statethe hypothesiscorrectly The more reactivethe metal,the more heatenergyis released/ Reactionof metal and acid releasesheat energy to the surrounding

(b)

(i) Able to write the aim of the experimet To studyheatchangein the reactionof metalswith acids (ii) able to statethe variables Constant: volume of acid / hydrochloricacid Manipulated: typesof metals Responding : Temperature/ thermometerreading.

I

2

I

I

Total

6

Mark

Total marks

I

1

1

I

2

2

I

I

Note I correct: 0 mark, 2 correct= 1 mark 3correct= 2 mark (iii) Able to list the apparatusand materials Boiling tube, 25ml measuringcylinder,thermometer, powderedZinc. powderedlron, spatula,hydrochloric acid. Hydrochloric acid is compulsory

\

(iv) Able to list procedurescorrectly L Measure20cmi of acid and pour into the boiling tube. 2. Add the powdered Zinc / Iron into the boiling tube 3. Observeand recordthe temperature. 4. Steps| ,2 , and3 using powderedzink / iron .

I I I I 4

(v) Able to tabulate datacorrectly Tvoes of metals PowderedZinc lIlon Powderedlron I Zinc

Temperature"C

Question Markinscriteria No (a) 1. gasX is carbondioxide l1

I

1

Mark

Total marks

I

2. Solar radiationreachesthe Earthto warm up the Earth's surface. Somereflectedback to space.

I

3. Some radiated as infrared as infrared radiation which is absorbedand trappedby gasX.

I

4. The trappedinfrared radiationcausesan increasein the Earth's temperatureand leadsto global warming

I

4

(i) The increasein temperatureis causedby the increasein the amountof greenhousegases

I

I

(ii) Greeenhousegasesespeciallycarbondioxide from combustionof fossil fuel//openburning // cutting down of trees

2

2

(iii) Stepsto be takeninclude: -

Using public transport//practisingcarpooling to reducenumber of vehicleson road

-

Stop burningof rubbish//openburning

q

I

1

-

1

Plantingtrees llhavinga garden

a J

(Accept any other relevant answers)

10

Total

Question Markins criteria No

12

Mark

(a) Thermoplastics Characteristics Can be repetedly Effect of heat melted No crosslinked

Bonding

Easilyattacked by organic solvents

Solubility

Low melting point

Melting point

4

Total marks 4

2

2

I

I

Thermoset Cannotbe repeatedly melted Crosslinked Withstand solvents High melting

(b) Able to statetwo common characteristicsof thermosets 1. has crosslinkage / do not slide easilyover one another 2.heal resistant 3. cannotbe repeatedlymelted Able to constructthe initial concept of thermosets l. A polymer that has crosslinkage and heat resistantis thermosets Able to give anotherexampleof thermosetsand non exampleof thermoplastics Another example 1. polyesterresins/ epoxy

1

Non - example 1. polythene 2. polypropene 3. Perspex 4. PVC 5. polystyrene

I

Able to constructthe actualconcept

I0

2

l. A thermosetis a polymerthat hascrosslinkages and heatresistant. Total

\\

I

I

10