f0recast PMR Paper ( Science )

©Sasbadi Sdn. Bhd. i

FORECAST 2008 PMR PAPERS

PAPER 1 [40 marks] One hour Answer all the questions.

Instructions: Questions 1 to 40 have four possible answers for each question. Choose the best answer

for each question.

1 A small bottle which can hold 25 cm3 of water is filled with 15 cm

3 of water only. One

ball bearing displaces 0.2 cm3 of water. How many ball bearings must be added into the

bottle so that the water in it fills the bottle?

A 30 B 40

C 50 D 60

2

The above are steps taken in a scientific investigation. Arrange the steps in the correct

sequence.

A Y, W, Z, X

B W, Y, X, Z

C Z, X, W, Y

D W, Y, Z, X

3 Diagram 1 shows a plant cell.

Diagram 1

Which labelled part stores water and nutrients?

A P

B Q

C R

D S

NEXUS PMR SCIENCE FORM 1•2•3

(Forecast 2008 PMR Papers)

Supplementary Materials for

W: Form a hypothesis

X: Form a rational conclusion

Y: Identify the problem

Z: Carry out an investigation

P Q

R

S

©Sasbadi Sdn. Bhd. ii

4 Which of the following is not part of the human nervous system?

A Nerve B Brain

C Spinal cord D Fallopian tube

5 Which statement best explains why a balloon filled with air expands when placed in the

sun?

Diagram 2

A The air particles receive heat energy and increase in size.

B The air particles receive heat energy and exert more pressure outwards.

C The pores in the balloon enlarge and let in more air particles.

D The rubber of the balloon becomes thinner and weaker.

6 Which of the following is most likely to be a molecule of sulphur?

A B

C D

7 Diagram 3 shows an experiment.

Diagram 3




balloon air particles

sunlight

carbon rods

copper chloride

solution

3 V

©Sasbadi Sdn. Bhd. iii

Which of the following is not an inference which can be drawn from this

experiment?

A Copper chloride is a compound.

B The elements in copper chloride can be separated by electrical energy.

C Carbon conducts electrical energy.

D Copper chloride compound in solid form conducts electrical energy.

8 There are forty students in a class. Which comparison between the air in the classroom

and the air outside it is incorrect?

Air inside classroom Air outside classroom

A Has more oxygen Has less oxygen

B Has more carbon dioxide Has less carbon dioxide

C Has more moisture Has less moisture

D 78 % of it is nitrogen 78 % of it is nitrogen

9 Diagram 4 shows a marble moving down a slope.

Diagram 4

At which point does the marble have maximum potential energy?

A W B X

C Y D Z

10 Diagram 5 shows a flask being warmed by a candle flame.

Diagram 5

Suggest a hypothesis for the experiment.

A Air is a mixture of gases.

B Air is made up of discrete particles.

C Air expands when it is heated.

D Air absorbs heat energy.




marble W

X

Y

Z

water air bubble

heat

air

©Sasbadi Sdn. Bhd. iv

11 The experiment shown in Diagram 6 is set up and left in the sun.

P Q

Diagram 6

Which explanation given below is correct?

Observation Reason

A The water rises higher in tin P A shiny white surface absorbs more heat

B The water rises higher in tin P A shiny white surface reflects more heat

C The water rises higher in tin Q A black dull surface absorbs more heat

D The water rises higher in tin Q A black dull surface radiates more heat

12 Which of the following does not make use of convection currents?

A Boiling water in an electric kettle

B Enjoying the sea breeze on the seashore

C Ventilating a hall with air holes near the roof

D Frying eggs in a frying pan

13 Diagram 7 shows a section through the human ear.

Diagram 7

The function of which part of the ear is incorrectly stated?

Part of the ear Function

A W To vibrate at the same frequency as the incoming sound waves

B X To help in balancing the body

C Y To equalize the air pressure on each side of the eardrum

D Z To change sound waves into vibrations




X

Z

Y

W

glass tube

drop of

water

air

black dull

surface shiny white

surface

©Sasbadi Sdn. Bhd. v

14 Which organ in the digestive system is the first to digest protein?

A Mouth B Stomach

C Duodenum D Large intestine

15 Which of the following is a mammal which lays eggs?

A Platypus

B Whale

C Dolphin

D Panda

16 Why are non-green plants such as fungi unable to carry out photosynthesis?

A They do not bear fruit and seeds.

B They do not have chlorophyll to absorb light energy.

C They do not require glucose for respiration.

D They do not have excess oxygen to be released into the air.

17 Which of the following is the correct definition of commensalism?

A Interaction between two organisms in which both organisms benefit

B Interaction between two organisms in which one benefits and the other is harmed

or killed

C Interaction between two organisms in which one benefits and the other is

unaffected

D Interaction in which two organisms complete for food and habitat.

18 A habitat has the following pyramid of numbers.

Diagram 8

Which of the following is the correct classification of the organisms?

Producers Primary consumers Secondary consumers

A Frogs Caterpillars Cabbages

B Caterpillars Cabbages Frogs

C Cabbages Frogs Caterpillars

D Cabbages Caterpillars Frogs




Frogs

Caterpillars

Cabbages

©Sasbadi Sdn. Bhd. vi

19

K, L, and M are chemical substances used in a water treatment reservoir. Identify the

substances represented by K, L and M.

K L M

A Slaked lime Alum Chlorine

B Alum Chlorine Slaked lime

C Chlorine Slaked lime Alum

D Slaked lime Fluoride Chlorine

20 In an experiment, two pieces of equally wet filter paper are hung up to dry as shown in

Diagram 9.

Diagram 9

Which of the following is a hypothesis which can be proved by this experiment?

A Water evaporates faster in dry air.

B Water evaporates faster from a large surface area.

C Water evaporates faster in moving air.

D Water evaporates faster in bright sunlight.

21 Why does water boil faster at the top of a mountain than at the foot of the mountain?

A It is more windy at the top of a mountain.

B It is colder at the top of a mountain.

C There is less air pressure acting on the water.

D There is more air pressure acting on the water.

22 Diagram 10 shows the same spring balance used to weigh two objects P and Q. Calculate

the weight of Q.

Diagram 10




K: To reduce the acidity of the water

L: To speed up sedimentation of solid particles

M: To kill microorganisms such as bacteria

thread

folded into

half unfolded

4 cm 6 cm

8 cm

P

Q 1.0 N

©Sasbadi Sdn. Bhd. vii

A 2.0 N B 3.0 N

C 4.0 N D 5.0 N

23

Diagram 11

A block of wood is pulled along the floor, as shown in Diagram 11. When a force

is applied to pull the bock of wood to the right, there will be another force which will

resist the pulling force. Name the resisting force and the direction of action of the force.

Resisting force Direction

A Gravity Downwards

B Electrostatic Upwards

C Effort To the right

D Friction To the left

24 Which organism is correctly matched with its support system?

Organism Support system

A Scorpion Endoskeleton

B Earthworm Hydrostatic skeleton

C Rubber tree Clasping roots

D Lotus plant Secondary xylem

25 Which of the following objects is the most stable and which is the least stable?

P Q R S

Diagram 12

Most stable Least stable

A R P

B P R

C Q S

D S Q




newton spring

balance

wooden

cylinder

wooden frustum

©Sasbadi Sdn. Bhd. viii

26 Diagram 13 shows a lever system.

Diagram 13

Which of the following devices has the same lever system as that shown in the above

diagram?

A See-saw B Scissors

C Bottle opener D Ice tongs

27 The lever shown in Diagram 14 is balanced horizontally.

Diagram 14

Using the same lever, an effort of 6 N is required to lift a certain load X. How heavy is

load X?

A 9 N

B 12 N

C 16 N

D 18 N

28

The alveoli in the lungs are suitable places for the diffusion of gases between them and

the blood capillaries. Which factors listed above help in the diffusion of these gases?

A P and R only

B Q and S only

C P, Q and S only

D P, Q, R and S




P: The alveoli form a very large surface area.

Q: The alveoli have a wall which is one-cell thick.

R: The alveoli are always moist.

S: The alveoli are covered with a network of blood capillaries.

fulcrum

load effort

fulcrum

load, 6 N

effort, 2 N

©Sasbadi Sdn. Bhd. ix

29 Diagram 15 shows a section through the human heart.

Diagram 15

Which of the labelled blood vessels is an artery which carries deoxygenated blood?

A W B X

C Y D Z

30 Which of the following is not one of the functions of the kidneys?

A They produce the hormone insulin.

B They regulate glucose in the blood.

C They regulate water in the blood.

D They reabsorb glucose and amino acids.

31

Diagram 16

Diagram 16 shows a duct in a man being cut and tied. This is done to …

A stimulate the man’s desire for sex.

B prevent urine from the bladder from entering the testis.

C prevent sperm from the testis from flowing out.

D prevent reproductive hormones from entering the bladder.

32 Diagram 17 shows a foetus in the uterus of its mother.

Diagram 17




bladder

penis

testis

duct cut

and tied

P

Y

Z

X

W

left right

©Sasbadi Sdn. Bhd. x

Which of the following is not supplied by the mother to the foetus through the structure

labelled P?

A Dissolved nutrients B Carbon dioxide

C Antibodies D Hormones

33

The stages in the development of a fertilized ovum are shown in the above list. Arrange

them in the correct sequence.

A Q, R, S, P

B S, R, Q, P

C Q, S, R, P

D S, Q, R, P

34 W, X and Y are three fractions of petroleum obtained from fractional distillation. Tests

on them give the following results.

W X Y

Viscous Not viscous Very viscous

Burns with a yellowish

flame

Burns with a blue flame Burns with a bright

yellow flame

Table 1

If the fractions used are petrol, fuel oil and diesel, identify them from the tests.

W X Y

A Petrol Fuel oil Diesel

B Fuel oil Diesel Petrol

C Fuel oil Petrol Diesel

D Diesel Petrol Fuel oil

35

Diagram 18

What will be the reading on the ammeter?

A 6 A B 8 A

C 10 A D 12 A




P: Baby Q: Zygote

R: Foetus S: Embryo

12 V

4 ohms

4 ohms

A

©Sasbadi Sdn. Bhd. xi

36 A negatively charged plastic ruler is brought close to a negatively charged electroscope.

Diagram 19

Which of the following explains what you will observe?

Gold leaf Explanation

A Diverges Protons are attracted to the gold leaf

B Diverges Electrons are repelled to the gold leaf

C Collapses Protons are repelled to the gold leaf

D Collapses Electrons move up to the metal cap

37

A device which uses the principle stated above is the …

A transformer.

B turbine.

C dynamo.

D miniature circuit breaker.

38

Diagram 20

Diagram 20 shows a part of a circuit in a house. W, X, and Y represent a switch, a lamp

and a fuse wire (not in the correct order). Identify W, X and Y.

W X Y

A Fuse Switch Lamp

B Switch Lamp Fuse

C Lamp Fuse Switch

D Switch Fuse Lamp




When a conductor cuts the lines of force of a magnetic field, an electric current is

generated in the conductor.

metal cap

negatively

charged

electroscope

negatively

charged

ruler

gold leaf

Y

X

W

live wire

©Sasbadi Sdn. Bhd. xii

39 Which of the following planets is now known as a “dwarf planet”?

A Mars

B Pluto

C Neptune

D Uranus

40 Angkasawan Dr. Sheikh Muszaphar Shukor was launched into outer space on 10 October

2007. What was his mission?

A To land on the Moon and study its rocks

B To land on Mars and look for water

C To search for aliens in outer space

D To carry out experiments in the International Space Station




©Sasbadi Sdn. Bhd. xiii

PAPER 2 One hour thirty minutes Section A [40 marks]

Instructions: Answer all the questions in this section.

1 Diagram 1 shows a substance being heated, causing it to change from state P to state Q.

P Q

Diagram 1

(a) Name the process which takes place during the heating.

__________________________________________________________________

[1 mark]

(b) Explain how heat causes the process to take place.

__________________________________________________________________

[1 mark]

(c) State the difference between the movement of the particles in P and Q.

__________________________________________________________________

__________________________________________________________________

[2 marks]

(d) What do we call the smallest particle of …

i iron?

____________________________________________________________

ii ice?

____________________________________________________________

[2 marks]




heat

©Sasbadi Sdn. Bhd. xiv

2 Diagram 2 shows an organ system in the human body.

Diagram 2

(a) i. Identity the system.

____________________________________________________________

[1 mark]

ii. What is the function of this system?

____________________________________________________________

[1 mark]

(b) Name the organ marked X.

__________________________________________________________________

[1 mark]

(c) An organ is made up of different tissues. Name two types of tissues present in

organ X.

__________________________________________________________________

[2 marks]

(d) Emily accidentally touched a beaker of hot water and quickly pulled her hand

away from the hot beaker. What system in her body enables her to feel the heat?

__________________________________________________________________

[1 mark]




X

©Sasbadi Sdn. Bhd. xv

3 Diagram 3 shows the apparatus set up to study a phenomenon.

Diagram 3

(a) Suggest a hypothesis that can be proved correct by this experiment.

__________________________________________________________________

__________________________________________________________________

[1 mark]

(b) What is the phenomenon shown by the seeds in this experiment known as?

__________________________________________________________________

[1 mark]

(c) State one way by which this phenomenon benefits plants.

__________________________________________________________________

[1 mark]

(d) Rubber trees growing near a road are observed to bend towards the road.

i. What stimulus causes the rubber trees to grow in that manner?

____________________________________________________________

[1 mark]

ii. How does the stimulus help the rubber trees?

____________________________________________________________

____________________________________________________________

[1 mark]

(e) What is meant by a negative tropism?

__________________________________________________________________

[1 mark]




wooden tray

with holes

germinating

seed

wet sawdust

block of

wood

©Sasbadi Sdn. Bhd. xvi

4 Diagram 4.1 shows four substances.

Diagram 4.1

(a) Classify the substances into two groups as shown in Diagram 4.2.

Diagram 4.2 [2 marks]

(b) i. Complete the following equation.

Magnesium + +

[1 mark]

ii. Based on the equation in (b) i., suggest a definition for an acid.

____________________________________________________________

[1 mark]




Substances

Characteristic Characteristic

Name of substance Name of substance

dilute

hydrochloric

acid

Toothpaste Apple Tea Milk of magnesia

©Sasbadi Sdn. Bhd. xvii

(c) A test tube containing dilute sodium hydroxide solution and ammonium chloride

is heated as shown in Diagram 4.3?

Diagram 4.3

i. State one observation that you can make.

____________________________________________________________

[1 mark]

ii. Write a word equation to show the chemical reaction that takes place.

____________________________________________________________

[1 mark]

5 Diagram 5 shows three beakers of chicken blood.

Diagram 5

Oxygen is bubbled into the blood in beaker P; carbon dioxide is bubbled into the blood in

beaker Q, and sodium chloride is added into the blood in beaker R. The blood in the three

beakers are stirred.




heat

ammonium

chloride

dilute sodium hydroxide

solution test tube

holder

chicken blood

oxygen carbon dioxide

sodium

chloride

P Q R

©Sasbadi Sdn. Bhd. xviii

(a) State what you will observe in each beaker.

__________________________________________________________________

__________________________________________________________________

[3 marks]

(b) What substance in the blood absorbs and transports oxygen?

__________________________________________________________________

[1 mark]

(c) What substance in the blood is able to destroy bacteria?

__________________________________________________________________

[1 mark]

(d) What happens in the blood of a person who is suffering from leukaemia?

__________________________________________________________________

[1 mark]

(e) State two differences in structure between an artery and a vein.

__________________________________________________________________

[2 marks]

6 (a) The circuit in Diagram 6.1 shows two resistors arranged in parallel.

Diagram 6.1




5 ohms

5 ohms

6 V

V2

V1

A

V

6 V

©Sasbadi Sdn. Bhd. xix

i. What is the voltage (V) across the battery?

____________________________________________________________

[1 mark]

ii. Calculate the total resistance in the circuit.

(Show your working)

[1 mark]

iii. State one advantage of arranging resistors in parallel in an electric circuit.

____________________________________________________________

[1 mark]

(b) Diagram 6.2 shows a transformer.

Diagram 6.2

i. The transformer has 300 turns of wire in the primary coil and 100 turns of

wire in the secondary coil. If the primary voltage (Vp) is 15 V, calculate

the secondary voltage (Vs). (Show your working)

[2 marks]




VS VP secondary

voltage

primary

voltage

lamp

lamp

©Sasbadi Sdn. Bhd. xx

ii. The primary voltage (Vp) is drawn against the secondary voltage (Vs) for

two transformers as shown in Diagram 6.3.

Diagram 6.3

What type of transformers are P and Q?

____________________________________________________________

____________________________________________________________

[2 marks]

iii. Why are laminated soft iron plates used as the core of a transformer?

____________________________________________________________

[1 mark]




Primary

voltage (V)

Secondary

voltage (V)

transformer P

transformer Q

1

2

3

4

1 2 3 4 5 6

©Sasbadi Sdn. Bhd. xxi

Section B [20 marks]

Instructions: Answer all the questions in this section.

7 Diagram 7.1 shows lead sulphide being heated in a test tube.

Diagram 7.1

(a) Why is the test tube containing lead sulphide powder clamped horizontally?

__________________________________________________________________

[1 mark]

(b) i. State one precaution which should be taken when this experiment is being

carried out.

____________________________________________________________

[1 mark]

ii. Give a reason for taking this precaution.

____________________________________________________________

[1 mark]

(c) What change will you observe in the acidified potassium manganate(VII) solution

after a while?

__________________________________________________________________

[1 mark]

(d) Write a word equation to show the effect of heat in lead sulphide.

__________________________________________________________________

[1 mark]




lead sulphide

heat

acidified potassium

manganate(VII) solution

©Sasbadi Sdn. Bhd. xxii

(e) Name a metal sulphide which cannot be decomposed by heating.

__________________________________________________________________

[1 mark]

(f) Diagram 7.2 shows a mixture of metal powder and sulphur powder being heated.

Diagram 7.2

This experiment is carried out by heating two mixtures, one at a time. The results

are given in Table 7.3.

Mixture Reaction Product

Metal X and

sulphur

The heated mixture glows.

The glow spreads slowly by itself.

Black substance

Metal Y and

sulphur

The heated mixture glows brightly.

The bright glow spreads quickly by

itself.

White substance

Table 7.3

i. Which metal (X or Y) is more active?

____________________________________________________________

[1 mark]

ii. What is metal Y most likely to be?

____________________________________________________________

[1 mark]

iii. What inference can you form from observing that the glow spreads by

itself through the mixture after initial heating?

____________________________________________________________

[1 mark]




mixture of metal powder

and sulphur powder

heat

©Sasbadi Sdn. Bhd. xxiii

iv. The products obtained in the experiment are metal sulphides. Suggest how

you can get back iron from iron sulphide.

____________________________________________________________

____________________________________________________________

[1 mark]

8 Diagram 8.1 shows the apparatus set up to study how the nature of the surface in contact

with a block of wood affects the frictional force produced between the surface and the

block of wood.

Diagram 8.1

(a) State the variables involved in the experiment.

i. Constant variable: ____________________________________________

ii. Manipulated variable: _________________________________________

iii. Responding variable: __________________________________________

[3 marks]

(b) The results of the experiment are given in Table 8.2.

Nature of surface Frictional force produced (N)

Glass surface 3.0

Table surface 5.0

Rough floor 8.0

Table 8.2

What conclusion can you draw?

__________________________________________________________________

[1 mark]




frictional force

block of

wood

newton spring

balance

pulling force

©Sasbadi Sdn. Bhd. xxiv

(c) Predict the results of the experiment if …

i. a heavier block of wood is used.

____________________________________________________________

[1 mark]

ii. the same block is used with its narrow side touching the surface.

____________________________________________________________

[1 mark]

(d) In an experiment which is carried out to study the relationship between the

extension of a spring and the force pulling it (Diagram 8.3), the results shown in

Table 8.4 are obtained.

Force (N) 1 2 3 4 5

Extension

(cm)

1.5 3.0 4.5 6.0 7.5

Table 8.4

Diagram 8.3

i. Based on Table 8.4, draw a graph of the extension of the spring against the

force puling it.

[2 marks]




spring

long needle

pan

ruler

2

4

6

8

10

0 1 2 3 4 5 6

Extension of

spring (cm)

Force (N)

©Sasbadi Sdn. Bhd. xxv

ii. Based on the graph you have drawn, what conclusion can you draw

regarding the relationship between the extension and the force?

____________________________________________________________

[1 mark]

iii. From your graph, read the extension of the spring when the force is 6.5 N.

____________________________________________________________

[1 mark]




Date post:	12-Nov-2014
Category:	Documents
Upload:	maisaratul-syaza-amanina
View:	5,316 times
Download:	1 times

f0recast PMR Paper ( Science )

Documents