1

Instructions: Answer all questions. Each question is followed by four choices, A, B, C, and D. Pick the most suitable answer.

(50 marks) Time: 1 hour 15 minutes PAPER 1

1 Diagram 1 shows the structure of a neurone.

Diagram 1

Which part, A, B, C, or D is the cell body?

2 Diagram 2 shows the pathway of an impulse when a hand touches a cup of hot coffee.

Receptor K L Mrelayneurone

Diagram 2

What are K, L and M ?

K L M

A Sensory neurone

Effector Motor neurone

B Sensory neurone

Motor neurone

Effector

C Motor neurone

Sensory neurone

Effector

D Effector Motor neurone

Sensory neurone

3 Diagram 3 shows four parts of a human central nervous system.

Diagram 3

Which part, A, B, C, or D is a centre of memory?

4 Diagram 4 shows the endocrine glands of a teenage girl.She has a high blood sugar level.

Diagram 4

Which gland, A, B, C, or D is malfunctioning?

5 Diagram 5 shows a cross between two garden pea plants.

Diagram 5

What is the expected ratio of the number of yellow pea plants to the number of green pea plants in the offspring?A 1 : 0 C 2 : 1B 1 : 1 D 3 : 1

SCIENCESPM Forecast Paper

A B

C

D

A

B

DC

A

B

CD

Yy

Yellow

Parental cell:

Gametes:

F1 generation:

Key:Y – Yellow / dominant geney – Green / recessive gene

Yellow

Yy

Y

YY Yy

y Y y

Yy yy

2

6 How many daughter cells are produced when a cell undergoes mitosis and meiosis respectively?

Mitosis Meiosis

A 1 1

B 1 2

C 2 2

D 2 4

7 Which chromosome set is present in a human ovum?A 22 + X B 22 + Y C 44 + XX D 44 + XY

8 Diagram 6 shows a cross between the Dura and Pisifera varieties of oil palm.

Diagram 6

Which characteristic is chosen in the cross?A Thin kernel B Thick shell C Thick mesocarp D Fruit drops easily

9 The following characteristics are shown by a lady suffering from a disease caused by mutation.

• Sterile• Ages prematurely• Has XO sex chromosomes

What is the disease?A Colour-blindnessB Turner’s syndromeC Down’s syndromeD Klinefelter’s syndrome

10 Diagram 7 shows a change in the state of matter.

Diagram 7

What is P ?A MeltingB FreezingC BoilingD Sublimation

11 Diagram 8 shows the nucleus of atom L.

Diagram 8

What is the nucleon number of atom L?A 1B 4C 5D 9

12 The information shows the properties of substance X.

• Ductile• Malleable• Used for making electric wires

What is X ?A TinB IronC CopperD Aluminium

13 Diagram 9 shows a simplified Periodic Table.

Diagram 9

In which section of the Periodic Table are the non-metals found?

14 Which substance is made of ions?A LeadB GoldC ProteinD Copper sulphate

process P

jelly solution jelly cube

proton neutron

A CBD

Dura Pisifera

X

Tenera

3

15 Diagram 10 shows the purification of silver.

Diagram 10

What is K ?A Silver nitrate solutionB Copper sulphate solutionC Molten aluminium oxideD Molten lead bromide

16 Which of the following are the charges of alpha ray and beta ray?

Alpha ray Beta ray

A Positive Neutral

B Positive Negative

C Negative Neutral

D Negative Positive

17 Which of the following is used to estimate the age of ancient artefact?A Cobalt-59 C Carbon-13B Cobalt-60 D Carbon-14

18 Which of the following is the effect of radioactive radiation?A Acid rainB Mutation of cellsC Greenhouse effectD Depletion of ozone layer

19 Diagram 11 shows an object placed in front of a convex lens.

Diagram 11

Which of the following are the characteristics of the image?A Real and uprightB Real and invertedC Virtual and uprightD Virtual and inverted

20 What causes the red sunset?A Red light is the slowest.B Red light is most refracted.C Red light is least absorbed.D Red light is least scattered.

21 Diagram 12 shows the colour of an object in white light and cyan light.

white light

yellow

cyan light

light X

Diagram 12

What is the colour of light X ?A Red B Blue C Black D Green

22 Which of the following is the secondary colour of pigment?A Red C GreenB Blue D Yellow

23 Which of the following is a correct use of colours by living things?A The colourful scales of fighting fish frighten off

its enemies.B The bright colours of a sea snake attract the

attention of others.C The colourful feathers of a peacock attract the

attention of peahens.D The changes in the colour of a squid body

attract the attention of others.

24 Which of the following is the effect of excessive nitrogen dioxide in the air from the burning of fossil fuels?A Acid rain B EutrophicationC Greenhouse effectD Thinning of the ozone layer

25 Diagram 13 shows a flower vase.

L

Diagram 13

impure silver pure silver

+ –

K

2F 2F

object

F F

4

What is the material used to make the part labelled L?A Iron C PewterB Bronze D Duralumin

26 Diagram 14 shows an insect that can carry the virus of a disease.

Diagram 14

What is the disease spread by this insect?A Cholera C TuberculosisB Hepatitis A D Dengue fever

27 Which of the following food has the lowest calorific value?A C

B D

28 Table 1 shows the calorific values of four food samples.

Food Calorific value (kJ g-1)

Fried mee 8.1

Prawn 3.8

Anchovy 9.4

Pineapple juice 2.1

Table 1

Fang Yee eats 50 g of fried mee, 30 g of prawn, 20 g of anchovy and drinks 110 g of pineapple juice.What is the total calorific value obtained from his meal?A 23.4 kJ C 93.8 kJB 234 kJ D 938 kJ

29 Diagram 15 shows a decrease in lumen size of an artery.

Diagram 15

Which class of food can lead to this decrease in lumen size?A CarbohydrateB ProteinC FibreD Fat

30 Which element is required for the healthy growth of roots in plants?A Calcium C PhosphorusB Nitrogen D Magnesium

31 Which bacteria are responsible for changing nitrogen gas into nitrates?A Decaying bacteria B Nitrifying bacteriaC Denitrifying bacteriaD Nitrogen-fixing bacteria

32 What causes the greenhouse effect?A Ammonia B Carbon dioxideC SewageD Chlorofluorocarbon

33 Diagram 16 shows a layer of gas L in the atmosphere.

Diagram 16

What is gas L?A NitrogenB Ozone C Carbon dioxideD Chlorofluorocarbon

34 What is the main content of butter?A Sugar C FatB Fibre D Protein

35 The following equation shows the formation of soap.

heatpalm oil + alkali soap + X

What is X?A Acid C AlcoholB Ester D Glycerol

lumenlumen

ultraviolet ray

gas L

Earth

Sun

5

36 The following data shows the uses of substance Y.

• Make perfume• Make artificial food flavouring• Mixed with petrol to form fuel

What is substance Y ?A Diesel C Palm oilB Alcohol D Kerosene

37 Diagram 17 shows the velocity of a trolley in position P and position Q.

3 m s–1

P

5 m s–1

Q

Diagram 17

The time taken by the trolley to move from position P to position Q is 2 s. What is the acceleration of the trolley?A 1.0 m s–2 C 4.0 m s–2

B 2.5 m s–2 D 7.5 m s–2

38 Which of the following has the highest momentum?A Airplane parking at an airportB Submarine floating in the seaC Satellite orbiting about it axesD Boy standing on a weighing machine

39 Which of the containers, A, B, C, or D shown in

Diagram 18 is acted by the largest upthrust?

A B C D

Diagram 18

40 Diagram 19 shows a force of 50 N acted on larger piston is balanced by a force of F N.

Diagram 19

What is the value of F ?A 2.0 N C 50.0 NB 12.5 N D 200.0 N

41 Which of the following is based on the principle of Bernoulli?A The upward motion of an airplaneB A ship takes a longer time to stopC A streamlined ship moves faster in the seaD A car is slowed down by pressing the brake

42 Diagram 20 shows the label on the drink container of apple juice.

A1 apple juice

Applicious Sdn. Bhd. 111, Jalan Pegawai,

32000 Sitiawan,Perak Darul Ridzuan.

Ingredients

325 ml

Vitamin C, sugar, citric acid, apple juice and permissible preservatives

Diagram 20

What is the missing information for this food label according to the Food Regulations 1985?A Net volumeB Expiry dateC Name of main ingredientD Name and address of the food manufacturer

43 Choose the correct match.

Type of chemical Example

A Bleach Caramel

B Colouring Vanilla

C Flavouring Boric acid

D Preservative Benzoic acid

44 Which way is most suitable for disposing of non-biodegradable plastic?A Bury in soil B Place under the sunlightC Burn in an incineratorD Throw into drain

45 Diagram 21 shows the coagulation of latex using substance T.

+ T

latex coagulated latex

Diagram 21

cross sectionalarea 20 cm2

piston

F N50 N

oilcross sectional

area 5 cm2

6

1 Diagram 1.1 and Diagram 1.2 show an experiment to investigate the effect of temperature on the fermentation process.

Diagram 1.1

Diagram 1.2

What is T ?A Water C Formic acidB Common salt D Ammonia solution

46 Which of the following pairs of polymer and monomer is correctly matched?

Polymer Monomer

A Sugar Amino acid

B Polyvinyl chloride (PVC) Chloroethene

C Perspex Styrene

D Polypropene Ethene

47 The following information shows the process of forming perspex from methyl metacrylate.

heatperspex methyl metacrylate

What is this process?A Distillation C DepolymerisationB Crystallisation D Vulcanisation

48 A wave with a frequency of 10 Hz has a wavelength of 2 m. What is the velocity of the wave?A 5 m s–1 C 12 m s–1

B 8 m s–1 D 20 m s–1

49 UHF and VHF are two components of radio waves. Which of the following is true about UHF and VHF?A Velocity of UHF is higher than that of VHF.B Frequency of UHF is larger than that of VHF.C Amplitude of UHF is larger than that of VHF.D Wavelength of UHF is longer than that of VHF.

50 Diagram 22 shows three communication satellites in their orbit.

Diagram 22

Which of the following is correct about the satellites?A They orbit at the same speed.B They orbit at different speeds.C They are at rest about their orbit.D They accelerate about their orbit.

Section A (20 marks)

Answer all questions in this section.

The time suggested to answer this section is 60 minutes.

Time: 2 hours 30 minutes PAPER 2

Earth

water (10°C)

conical flask

yeast +sugar solution

test tubegas collected after 15 minutes

water (20°C)

conical flask

yeast +sugar solution

test tube

gas collected after 15 minutes

7

(a) (i) State one observation that can be made from the experiment. [1 mark] (ii) State the inference that can be made based on the observation made in 1(a)(i). [1 mark]

(b) State the variables in this experiment. (i) Manipulated variable [1 mark] (ii) Responding variable [1 mark]

(c) Tick the food that can be used for fermentation.

Pineapple

Butter

Rice [1 mark]

2 Diagram 2 shows a graph of the volume of hydrogen gas produced at every 3 minutes in the reaction of 25 g of metal P and 25 g of metal L with 220 cm3 of sulphuric acid.

time (minute)

30

10

20

30

6 9 12 15 18

volume ofhydrogen

produced (cm3)

metal L

metal P

Diagram 2

(a) Write down one hypothesis for this experiment. [1 mark]

(b) State the variables in this experiment. (i) Manipulated variable [1 mark] (ii) Responding variable [1 mark] (iii) Constant variable [1 mark]

(c) Which metal produces less hydrogen gas at the ninth minute? [1 mark]

(d) Predict the volume of hydrogen gas produced by metal L at the 21st minute? [1 mark]

3 Diagram 3 shows a thermometer used to take the temperature of hot liquid.

40

30

Diagram 3

8

(a) Measure and record the temperature of hot liquid. [1 mark]

Temperature = °C

(b) The temperature of the liquid is taken every minute. Table 1 shows the temperature of the liquid in 5 minutes.

Time (minute) 0 1 2 3 4 5

Temperature (°C) 50 36 28 20 18

Table 1

On the graph paper below, plot a graph of temperature against time. [1 mark]

(c) Based on the graph plotted, (i) state a relationship between the temperature of the liquid and time. [1 mark] (ii) what is the temperature of the liquid after 3 minutes? [1 mark]

4 Diagram 4 shows the results of an experiment to study the concept of pressure acting on a surface by two identical solids.

plasticine

solids

Diagram 4

(a) State an observation for this experiment. [1 mark]

(b) Based on the observation in 4(a), write down one inference for the experiment. [1 mark]

(c) State the variables in this experiment. (i) Constant variable [1 mark] (ii) Manipulated variable [1 mark]

(d) What is the operational definition for the pressure? [1 mark]

0

10

20

30

40

50

60

1 2 3 4 5time (minute)

temperature (°C)

9

Section B (30 marks)Answer all questions in this section.

The time suggested to answer this section is 50 minutes.

5 Diagram 5 shows a type of neurone.

P

Diagram 5

(a) Name the type of neurone shown in Diagram 5. [1 mark]

(b) (i) Name the part labelled P. [1 mark] (ii) State two functions of P. [2 marks]

(c) Fill in the boxes below with the correct sequence for the pathway of an impulse.

sensory neurone motor neurone effector

[2 marks]

6 Diagram 6.1 shows the structure of a nuclear reactor.

control rod

concrete wall

nuclear fuel

Diagram 6.1

(a) State the nuclear fuel used in the nuclear reactor. [1 mark]

(b) Name the process that produces energy in the reactor. [1 mark]

(c) What is the function of the thick concrete wall? [1 mark]

Diagram 6.2 shows another process to produce energy.

hydrogren–2

energy

particle YX

hydrogren–3

+ +

Diagram 6.2

10

(d) (i) What is X ? [1 mark] (ii) What is Y ? [1 mark]

(e) State a condition for the process to occur. [1 mark]

7 Diagram 7 shows a blast furnace where tin is extracted from its ore.

hot air

substance K +

limestone+

coke

molten tinL

Diagram 7

(a) State the mineral name of substance K. [1 mark]

(b) Based on Diagram 7, what is the optimum temperature of the blast furnace? [1 mark]

(c) Name the two impurities that are usually present in tin ore. [2 marks]

(d) What is the function of coke in this extraction process? [1 mark]

(e) Name substance L. [1 mark]

8 Diagram 8 shows the wrapper label of a wholemeal bread.

Ingredients

Net weight 400 g

Wholemeal flour withbran & grains, wheat fibre,yeast, sugar, vegetable fat, salt, vitamins andpermitted emulsifier

City A1Wholemeal

BreadHigh Bran & Grains

Diagram 8

(a) Name two information which are missing from the food label. [2 marks]

(b) State the flavourings used in the making of the bread. [1 mark}

(c) (i) Give an example of permitted emulsifier which is usually added to bread. [1 mark] (ii) What is the purpose of using emulsifier in bread? [1 mark]

(d) Why is consuming wholemeal bread much better than eating white bread? [1 mark]

11

9 Diagram 9 shows a block diagram of a radio transmission system.

oscillator amplifier

aerial

microphone

k:

Diagram 9

(a) (i) In Diagram 9, write down the block represented by K. [1 mark]

(ii) What is the function of block K ? [1 mark]

(b) What is produced in the oscillator? [1 mark]

(c) A transistor is used in the amplifier circuit. (i) What is the function of transistor in the above block diagram? [1 mark] (ii) Draw a symbol of transistor in the box provided below. [1 mark]

(d) The signals from the system are transmitted through the aerial. In the statement below, underline the velocity of the signals.

The signals are transmitted at the velocity of (light, sound, water). [1 mark]

Section C (20 marks)Answer Question 10 and either Question 11 or Question 12.

The time suggested for this section is 40 minutes.

10 Study the following statement.

Different metals show different reactivities with oxygen.

(a) Based on the metals, magnesium, zinc and iron, suggest one hypothesis to investigate the above statement. [1 mark]

12

(b) Describe an experiment which you can carry out in a laboratory to test your hypothesis in 10(a). Your description should include the following criteria. (i) Aim of the experiment [1 mark] (ii) Identification of variables [2 marks] (iii) List of apparatus and materials [1 mark] (iv) Procedure [3 marks] (v) Tabulation of data [1 mark] (vi) Conclusion [1 mark]

11 The two types of changes in matter are physical change and chemical change.(a) Diagram 10.1 shows the melting of ice.

Diagram 10.1

State three reasons why the reaction in Diagram 10.1 is a physical change. [3 marks]

(b) Diagram 10.2 shows chemical changes in three different materials.

heated

exposed to

oxygen and water

in air

liquid egg

clear iron nail

burning magnesium ribbon

fried egg

rusted iron nail

burnt magnesium ribbon

Diagram 10.2

Study the data given in Diagram 10.2 and build the concept of chemical change. Your answer should be based on the following: (i) Identify the data [1 mark]

13

(ii) State the two common characteristics [2 marks] (iii) Relate the common characteristics to the chemical change so as to construct the initial concept [1 mark] (iv) Name one example of another chemical change and non-chemical change [2 marks] (v) Give the actual concept of chemical change [1 mark]

12 (a) Explain the causes of obesity in an individual. [4 marks](b) The following poster highlights the heart problem of people.

Beware! The number of people dying from heart diseases are increasing at a fast rate.

Explain how we can overcome the problems related to heart diseases. Your answer should include the following: (i) Identify the problem [2 marks] (ii) State the causes of the problem [2 marks] (iii) Suggest two methods to solve the problem [2 marks]

14

ANSWERS

Paper 1 1 C 2 B 3 A 4 C 5 D 6 D 7 A 8 C 9 B 10 B 11 D 12 C 13 D 14 D 15 A 16 B 17 D 18 B 19 C 20 D 21 D 22 C 23 C 24 A 25 C 26 D 27 B 28 D 29 D 30 C 31 D 32 B 33 B 34 C 35 D36 B 37 A 38 C 39 B 40 B 41 C 42 B 43 D 44 C 45 C 46 B 47 C 48 D 49 B 50 A

Paper 2Section A 1 (a) (i) The amount of gas collected after

15 minutes at 20°C is more than that collected at 10°C.

(ii) Fermentation process carried out at 20°C is faster than that at 10°C.

(b) (i) Temperature (ii) Amount of gas collected after 15 minutes(c) Pineapple and rice

2 (a) Metal L reacts more with dilute sulphuric acid than metal P.

(b) (i) Type of metals (ii) Volume of hydrogen gas (iii) Concentration of dilute sulphuric acid(c) Metal P(d) 30 cm3

3 (a) 40°C (b)

(c) (i) Temperature of the liquid is inversely

proportional to time.

(ii) 23°C

4 (a) The dent produced by the solid on the right hand side is deeper than that of the left hand side.

(b) The deeper dent is due to force acting on a smaller area.

(c) (i) Weight of the solid (ii) The area where the force is acting on(d) Pressure is the depth of the dent caused by the

object.

Section B 5 (a) Motor neurone

(b) (i) Myelin sheath (ii) P acts as an insulator . P is a source of food for the dendrons and

axons.(c)

sensory neurone

motor neurone

effectorreceptorcentral nervous system

6 (a) Uranium-235(b) Nuclear fission(c) Prevent the escape of radioactive radiation to

the atmosphere(d) (i) Helium nucleus (ii) Neutron(e) High temperature and pressure

7 (a) Cassiterite(b) 1400°C(c) Sulphur and arsenic(d) Coke reduces tin ore to tin(e) Slag

8 (a) Expiry date, name and address of manufacturer(b) Salt and sugar(c) (i) Pectin (ii) To prevent fats in the dough from

separating out.(d) Wholemeal bread contains more fibre than

white bread. It can prevent constipation.

9 (a) (i) Modulator (ii) Combine the audio signals with the carrier

waves(b) Radio waves / carrier waves(c) (i) Amplify the modulated radio frequency waves

0

10

20

30

40

50

60

1 2 3 4 5time (minute)

temperature (°C)

15

(ii)

(d) light

Section C10 (a) The metals, magnesium, zinc and iron show

different reactivities with oxygen.(b) (i) To study the reactivities of metals with

oxygen (ii) Manipulated variable: Type of metals Responding variable: Intensity of flame Constant variable: Amount of metal powder (iii) Boiling tube, Bunsen burner, spatula, glass

wool, asbestos paper, tripod stand, magnesium powder, zinc powder, iron powder, potassium manganate (VII) and glass wool

(iv)

1 The apparatus is set up as shown in the above diagram.

2 The magnesium powder is heated until it glows.

3 Potassium manganate (VII) crystals are heated to release oxygen gas.

4 The changes and the reactivities of the metals are observed.

5 The above steps are repeated using zinc powder and iron powder.

(v)

Metal powder Intensity of flame Reactivity

Magnesium Burns with a bright white flame

Fastest

Zinc Burns with a bright flame

Fast

Iron Glows with red colour

Moderate

(vi) Magnesium reacts the fastest with oxygen followed by zinc and iron.

11 (a) • No new substances are produced • Reversible and temporary • No changes in chemical contents and

properties(b) (i) Change in matter occurs (ii) • New substance is formed • Irreversible and permanent (iii) There is an increase or decrease in the

weight of substances studied. (iv) Chemical change: Heating iron with sulphur Non-chemical change: Sugar dissolving in

water (v) A change which produces new substances

with different properties and chemical composition from the original substance.

12 (a) Obesity occurs when a person eats excessively more than his or her daily energy requirements.

Excess food is changed into fats and stored beneath the skin and surrounding the internal organs.

(b) (i) Coronary heart disease, thrombosis and high blood pressure

(ii) • Lack of exercise. Taking excessive food rich in cholesterol.

• The cholesterol gets deposited inside the arteries and causes the narrowing of the lumen.

• Thickening of the arterial wall slows down blood flow through the arteries.

(iii) • Eating moderately/Exercising regularly • Cutting down on food rich in fats and

cholesterol

heatheatmagnesium powder

glass wool

asbestos paper

potassium manganate (VII)