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Chapter
Scientifc Investigation1
Objective Questions
1. Which of the following explains
correctly the meaning of making a
hypothesis?
A Making an observation
B Making a conclusion
C Making an inference
D Making a statement relating the
manipulated variable and the
responding variable
2. When a problem has been identied in a
scientic investigation, the next step is
A to collect the relevant data.
B to plan an experiment.C to form a hypothesis.
D to draw a conclusion.
3. What is the next step in scientic
investigation after observing a natural
phenomenon and wondering why it
happens?
A Identifying the problem
B Planning an investigation
C Drawing a conclusion
D Collecting data
4. Which of the following is observable,
but not measurable data?
A Time taken for a change to occurB Rise in temperature
C Change in colour
D Voltage produced
5. Which of the following is not one of
the processes involved in planning an
experiment?
A Controlling variables
B Recording of data
C Step-by-step list of procedure
D Determining apparatus and materials
to be used
6. The table shows a set of data obtained
from an experiment.
Time (s) 0 30 60 90 120 150 180
Temperature
(C)30 32 35 39 48 69 85
Which of the following charts is most
suitable to represent the data?
ATemperature (C)
Time (s)
BTemperature (C)
Time (s)
CTemperature (C)
Time (s)
D
7. Which of the following is not a suitab
method of analysing data?
A Using graphs
B Using tables
C Using histogram
D Using tape recorders
8. The diagram shows the apparatus use
in an experiment.
30 cm3 of water
What is the responding variable in the
experiment?
A Surface area
B Rate of evaporation
C Initial volume of water
D Size of container
9.Impurities present in water affect th
boiling point of water.
Based on the above hypothesis, what
the responding variable?
A Presence of impurities
B Boiling point of water
C Volume of water
D Temperature of water
10. Which of the following are the positiv
scientic attitudes and noble values
needed in recording data?
I Honesty
II Accuracy
III CareA I and II only C II and III o
B I and III only D I, II and II
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Structured Questions
1. Diagram 1 shows an experiment.
2934
Painted
white
Unpainted
Air
Painted
black
Air Air
Diagram 1
(a) Complete the following table based on the diagram.
Flask Temperature (C)
Painted white
Unpainted
Painted black
(b) State the following variables in the experiment.(i) Manipulated :
(ii) Responding :
(iii) Constant :
(c) State a hypothesis for the experiment.
2. Diagram 2 shows the steps involved in a scientic investigation.
(a) Fill in the blanks with suitable words chosen from those given in the box.
Collecting data Forming hypothesis Making conclusion
Identifying
problem
Planning
investigation
Analysing
data
Diagram 2
(b) The data collected during an experiment can be organised in graphical forms.
Give three examples of graphical forms that can be used to represent the data obtained in an experiment.
(i)
(ii)
(iii)
(c) What should be done if the result of an experiment disproves the hypothesis?
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Chapter
Body Coordination2
Objective Questions
1. Which of the following is not correctly
given?
Nervous system
controls
Endocrine
system controls
A speech. growth.
B memory. sexual maturity.
C involuntary
actions.
blood glucose
level.
D the senses. thinking.
2. The following diagram shows a neurone.
What type of a neurone is it?
A A receptor
B A motor neurone
C A relay neurone
D A sensory neurone
3. Neurone Xsends impulses from the
central nervous system to effectors.
Neurone Xis a
A receptor.
B motor neurone.
C relay neurone.
D sensory neurone.
4. Neurones are not directly connected
to one another. There is always a gap
between two adjacent neurones.
This gap is known as
A myelin sheath. C synapse.
B dendrite. D cell body.
5. The path taken by an impulse during a
certain type of action is shown below.
Receptor Spinal cord Effector
Which of the following is an example of
the type of action?
A Reading
B Breathing
C Coughing
D Kicking a ball
6. Which of the following is an involuntary
action?
A Swallowing C Speaking
B Memorising D Thinking
7. The following diagram shows the human
brain.
P
What is the name of the part labelled as
P?
A Cerebrum
B Cerebellum
C Spinal cord
D Medulla oblongata
8. Which of the following is controlled b
the cerebrum?
A Writing
B SweatingC Digesting
D Sneezing
9. The hormones in our body are
transported by
A blood.
B ducts.
C the nervous system.
D the excretory organs.
10. The following diagram shows the
locations of the major endocrine gland
in the human body.
A
B
C
D
Which of the glands, A, B, C or D,
secretes hormones when one is indanger?
Structured Questions
1. Diagram 1 shows the structure of a neurone.
Receptor
P:
Q:R:
Diagram 1
(a) Label the structures, P, Q andR, with their respective names.
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(b) Name the neurone shown in the diagram.
(c) What is the function of the receptor?
(d) On the diagram, draw arrows () to show the direction of movement of an impulse.
2. Diagram 2 shows some of the differences between nervous coordination and hormonal coordination.
Nervous coordination Hormonal coordinationDifferences in terms of
Form of message
Speed of transmission
Effectors Parts affected Target organs
Localised and temporary Effects Widespread and irreversible
Duration of response
Diagram 2
(a) Complete the above graphical organiser.
(b) Why are the endocrine glands also known as ductless glands?
(c) Name the endocrine glands that secrete insulin.
Chapter
Heredity and Variation3
Objective Questions
1. What are the functions of mitosis?
I It replaces worn out cells.
II It increases the number of cells.
III It produces reproductive cells.
A I and II only C II and III only
B I and III only D I, II and III
2. In which of the following organs does
meiosis take place?
A Brain
B Heart
C Ovary
D Stomach
3. Each ovum produced by a woman has
A 20 chromosomes.
B 23 chromosomes.
C 43 chromosomes.
D 46 chromosomes.
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4. There are 40 chromosomes in each bone
cell of a mouse.
When the bone cell undergoes mitosis,
how many chromosomes will each of the
daughter cells have?
A 20 C 60
B 40 D 80
5. A father with curly hair and a mother
with straight hair have four children, allof them with curly hair.
What can we conclude based on this
statement?
A Both curly hair and straight hair are
dominant traits.
B Both curly hair and straight hair
recessive traits.
C Curly hair is a dominant trait
whereas straight hair is a recessive
trait.
D Curly hair is a recessive trait
whereas straight hair is a dominant
trait.
6. Plant P which produces red owersis crossed with Plant Q which also
produces red owers. 3/4 of the rst
lial generation produce red owers
whereas 1/4 of them produce white
owers.
If R represents the dominant gene for
red owers and r represents the recessive
gene for white owers, what are the
genotypes of Plant P and Plant Q?
P Q
A RR rr
B RR Rr
C Rr RR
D Rr Rr
7. The following diagram shows the results
of a study on a certain variation among
some students.
Numberofstudents
Trait P
What can you infer from the diagram?
A Trait P shows continuous variation.
B Trait P shows discontinuous
variation.
C Trait P might be the blood group.
D Trait P is determined by genetic
information only.
8. Which of the following mutations is
caused by a change in the number of
chromosomes?
A Albinism
B Downs syndrome
C Sickle-cell anaemia
D Colour-blindness
9. The occurrence of a recessive mutant
trait, such as colour-blindness, takes
place
A equally often in males and female
B more often in females.
C only in males.
D more often in males.
10. Selective breeding can be done by
I cloning.
II articial insemination.
III embryo transplants.
A I and II onlyB I and III only
C II and III only
D I, II and III
Structured Questions
1. Diagram 1 shows the process of mitosis.
M
N
L
P
Q
Diagram 1
(a) State two functions of mitosis.
(i)
(ii)
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(b) Describe briey what happens at the following stages.
(i) StageM :
(ii) Stage P :
(c) State two characteristics of mitosis.
(i)
(ii)
2. Diagram 2 shows the schematic diagram of a monohybrid cross in pea plants.
F1generation
F2generation
Gametes
Diagram 2
(a) Complete the above diagram.
(b) State the percentage of plants in the F2
generation that bear
(i) purple owers :
(ii) white owers :
(c) State the ower-colour phenotype ratio of the F2
generation.
Chapter
Matter and Substance4
Objective Questions
1. The diagram shows the arrangements of
particles in two substances.
X Y
Which of the following gives correctly
the states of the two substances?
X Y
A Solid Liquid
B Liquid Gas
C Gas Liquid
D Solid Gas
2. The kinetic theory of matter explains
A the energy levels of particles and the
forces between particles in matter.
B the sizes of particles in matter.
C the arrangements of particles in
matter.
D the types of particles in matter.
3. The proton number of Atom P is 16 and
its nucleon number is 32.
From this we can conclude that
A Atom P has 32 neutrons.
B Atom P has 32 electrons.
C the total number of protons and
neutrons in Atom P is 32.
D the total number of protons and
electrons in Atom P is 16.
4. The proton number of AtomXis 2 w
its nucleon number is 4.
Which of the following represents
correctly the structure of AtomX?
A C
B D
Indicator
R : Dominant gene for purple
flowerr : Recessive gene for white
flower
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5. The diagram shows the interconversion
of states of matter.
Gas
Liquid
Solid
Q
P
R
S
Which of the following is not correct?
Process Name of process
A P Melting
B Q Sublimation
C R Condensation
D S Freezing
6. Which of the following are isotopes of
the same element?
Isotope
Proton
number
Nucleon
number
P 8 16
Q 7 16
R 8 17
S 6 14
A P and Q C Q and S
B P andR D R and S
7. The following gives some physical
properties of Metal P.
Soft
Strong
Can withstand heat
P is suitable to be made into
A electric wires.
B cooking utensils.
C cans.
D doors.
8. Which of the following is not one of the
uses of chlorine?
A To kill germs in swimming pools
B To make pesticides
C As a coolant
D As a bleaching agent
9. Which of the following bulbs will light
up?
I Dry cell
Bulb
Sugar
solution
II Dry cell
Bulb
Salt
solution
III Dry cell
Bulb
Lime
juice
A I and II only
B I and III only
C II and III only
D I, II and III
10. Which of the following mixtures can
separated by fractional distillation?
A Sugar and water
B Salt and water
C Oil and water
D Alcohol and water
Structured Questions
1. Diagram 1 shows the set-up of apparatus to obtain pure water from a salt solution.
Pure water
P
Round-bottomed
flask
Thermometer
Retort stand
Salt solution
Diagram 1
(a) Name the above process.
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(b) (i) Name Apparatus P.
(ii) State the function of Apparatus P.
(iii) On the diagram, draw and label arrows () to show how water ows into and ows out of P.
(c) Name a method used to obtain salt crystals from salt solution.
2. Diagram 2 shows a set-up of apparatus to investigate the electrical conductivity of various substances.
Bae
ry
Bae
ry
Bae
ry Bulb
Switch
Magnesiumstrip
Batteries
Diagram 2
The magnesium strip is then replaced by a lump of sulphur followed by a carbon rod.
Table 1 shows the observations of the experiment.
Substance Observation
Magnesium The bulb lights up.
Sulphur The bulb does not light up.
Carbon The bulb lights up.
Table 1
(a) State the following variables in the experiment.
(i) Manipulated :
(ii) Responding :
(iii) Constant :
(b) What is the operational denition for the experiment?
(c) Based on the results in Table 1, which of the substances conduct electricity?
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Chapter
Energy and Chemical Changes5
Objective Questions
1. Which of the following statements is not
true about a chemical change?
A A new substance is formed.
B A chemical change does not involveany change of energy forms.
C A chemical change is difcult to
reverse.
D A chemical change may absorb or
release heat.
2. What happens when iron lings are
heated with sulphur powder?
I The mixture glows brightly.
II A black solid is formed.
III A chemical change occurs.
A I and II only
B I and III only
C II and III only
D I, II and III
3. Which of the following involves a
chemical change?
A
B Steam
C
D
4. The diagram shows an experiment to
study the heat change in a chemical
reaction.
Ammonium
chloride
Thermometer Thermometer
28C30C
Water
What process is involved in the
experiment?
A Neutralisation
B Evaporation
C Endothermic
D Exothermic
5. Which of the following is an
endothermic reaction?
A Photosynthesis
B Burning of magnesium
C Reaction between a reactive metaland water
D Neutralisation
6. When sodium is put into water, the
temperature of the water increases.
This is because
A the reaction absorbs heat from the
water.
B it is an exothermic reaction.
C there is a net gain of energy.D the reaction absorbs heat from the
surroundings.
7. The reactants used in the production o
ammonia are
A oxygen and nitrogen.
B nitrogen and hydrogen.
C hydrogen and oxygen.
D oxygen and carbon dioxide.
8. Which of the following metals reacts
most vigorously with water?
A Calcium
B Sodium
C Magnesium
D Potassium
9. Which of the following metals cannot
extracted from its ore by using carbon
A Aluminium
B Iron
C Zinc
D Lead
10. Which of the following characteristic
of dry cells make it advantageous to u
dry cells?
I Light
II SmallIII Portable
A I and II only
B I and III only
C II and III only
D I, II and III
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Structured Questions
1. Diagram 1 shows the set-up of apparatus for an experiment.
Ammonium
chloride
Water
30 30
Temperature : ;
Diagram 1
(a) Fill in the blanks in the diagram.
(b) (i) What type of reaction is shown in Diagram 1 in terms of heat change?
(ii) Give a reason for your answer in (i).
(c) The following are some processes involving heat change.
Combustion of fuels Boiling of water
Burning of candles Photosynthesis
Which of the above processes involve heat change(s) similar to that shown in Diagram 1?
2. Diagram 2 shows the Haber process.
450 550
Catalyst Q
Gas X
Hydrogen
Ammonia gas Liquidified ammonia
Cooled
Diagram 2
(a) Name
(i) GasX :
(ii) Catalyst Q :
(b) What is the purpose of carrying out the Haber process?
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(c) State two uses of ammonia.
(i)
(ii)
(d)When a piece of red litmus paper is dipped into some ammonia solution, the litmus paper turns blue.
Based on the above information, what inference can you make?
Chapter
Nuclear Energy6
Objective Questions
1. What is radioactive decay?
A The decomposition of reactivesubstances
B The process whereby radioactive
substances are transformed into
radiations
C The decomposition of radioactive
substances by bacteria
D The process whereby an unstable
nucleus emits particles or radiations
to form a more stable nucleus
2. Which of the following can be reected
by an electric eld?
I Alpha particles
II Beta particlesIII Gamma rays
A I and II only
B I and III only
C II and III only
D I, II and III
3. Which of the following are the uses of
gamma radiation?
I Food preservation
II Sterilisation of medical instruments
III Pest control
A I and II only
B I and III only
C II and III onlyD I, II and III
4. Carbon-14 is used to
A trace the uptake of fertilisers by plants.
B estimate the ages of ancient remains
and artifacts.
C treat cancer patients.
D kill germs.
5. Which of the following radiations has
the highest penetrating power?
A Alpha particles
B Beta particles
C Gamma rays
D X-rays
6. Which of the following can be blocked
by an aluminium plate?
I Alpha particles
II Beta particles
III Gamma rays
A I and II onlyB I and III only
C II and III only
D I, II and III
7. The diagram shows a certain process.
High-energy
neutron
Radioactive
nucleus
This process is called
A nuclear ssion.
B nuclear fusion.
C radioactive decay.
D decomposition.
8. In a nuclear reactor, the generation of
electricity is powered by energy releafrom
A nuclear ssion.
B nuclear fusion.
C radioactive decay.
D decomposition.
9. Which of the following are the effects
radioactive radiation on living things?
I Infertility
II Premature aging
III Mutation of cells
A I and II only
B I and III only
C II and III onlyD I, II and III
10. Which of the following are the hazard
caused by the usage of radioactive
substances?
I The improper disposal of radioac
waste
II The risk of accidents in nuclear
power stations
III The long-term effects of nuclear
pollution
A I and II only
B I and III only
C II and III onlyD I, II and III
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Structured Questions
1. Diagram 1 shows a cylindrical container designed to store radioactive substances.
Cylindrical castlefor storage
4 mm plug
Holder
Active material
seated in ametal foil
Diagram 1
(a) What are radioactive substances?
(b) (i) Suggest a suitable material to make the cylindrical castle.
(ii) Explain your answer in (i).
(c) Predict what would happen if the cylindrical castle were made of paper?
2. Diagram 2 shows one use of radioactive substances.
Diagram 2
(a) State three otheruses of radioactive substances.
(i)
(ii)
(iii)
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Chapter
Light, Colour and Sight7
Objective Questions
1. Which of the following is not a
characteristic of images formed in a
plane mirror?
A Laterally inverted
B Virtual
C Diminished
D Upright
2. Which of the following ray diagrams is
correctly drawn?
A
Lens
B
Lens
C
Lens
D
Lens
3. A convex lens is directed to a building
situated beyond 2F, where F is the focal
point of the lens. A screen on the other
side of the lens is adjusted until a sharp
image is obtained.
What are the characteristics of the image
formed?
I Virtual
II Inverted
III Diminished
A I and II only
B I and III only
C II and III only
D I, II and III
4. The diagram shows the formation of an
image in a pinhole camera.
What will happen to the image if the
pinhole is enlarged?
A It becomes brighter and sharper.
B It becomes sharper.
C It becomes larger.
D It becomes brighter but more
blurred.
5. It is given that F is the focal point of a
convex lens.
Supposing you use the lens to form theimage of an object, where must you
place the object so that the image is real,
inverted and smaller than the object?
A Beyond 2F
B At 2F
C Between F and 2F
D At F
6. If a convex lens is placed in front of t
pinhole of a pinhole camera, the imag
formed will be
A blurred but bright.
B short and big.
C bright but small.
D sharp and bright.
7. Which of the following pairs has
structures with similar functions?
In the eye In the camer
A Iris Film
B Pupil Aperture
C Retina Diaphragm
D Cillary muscles Lens
8. Which of the following apparatuses c
disperse light?
A A plane mirror
B A prism
C A periscope
D A microscope
9. The diagram shows a beam of white
light directed to a prism.
Whitelight
Cyanfilter
Yellowfilter
Whsc
What is the colour of the strip of lighformed on the white screen?
A Red C Green
B Blue D Black
10. When blue and yellow pigments are
mixed together, the resulting pigment
A red. C green.
B blue. D cyan.
(b) Explain how radioactive substances are useful for the following purposes.
(i) Food preservation:
(ii) Pest control:
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Structured Questions
1. A student carried out a series of activities to investigate the images formed by using a concave lens.
(a) Complete the following ray diagrams to show the formation of images by the concave lens.
(i)
2F F F
Object
(ii)
2F F F
Object
(iii)
2F F F
Object
(b) State the characteristics of the images formed by a concave lens.
(c) Based on your drawings in (a), state the relationship between the distance of the object from the lens and the size of the image forme
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2. Diagram 1 shows the overlapping of three light beams of different colours on a white screen.
Cyan
Red
P Q Green
Diagram 1
(a) State the colours that appear in the areas, P and Q, respectively.
(i) P :
(ii) Q :
(b) State the two primary colours of light that can be added to produce cyan-coloured light.
(c) Based on the diagram, if a green lter is placed over the areas, P and Q, state the colours that will appear in the areas.
(i) P :
(ii) Q :
Chapter
Chemicals in Industry8
Objective Questions
1. What are the substances used to make
steel?
I Carbon
II IronIII Gold
A I and II only C II and III only
B I and III only D I, II and III
2. The hardness of a metal can be increased
by
A purication. C alloying.
B oxidation. D electroplating.
3. Which of the following is not one of the
purposes of producing alloys?
A To prevent corrosion
B To make metals lighter
C To make metals harder
D To improve the appearance of themetal
4. Superconductors are used in
I Magnetic Resonance Imaging (MRI).
II Maglev trains.
III computers.
A I and II only C II and III only
B I and III only D I, II and III
5. Which of the following is incorrectly
matched?
Alloy Product
A Steel Cooking utensils
B Pewter Decorative items
C Bronze Medals and statues
D Brass Air craft fuselage
6. Which of the following will decrease
the production of ammonia in the Haber
process?
I Increasing the temperature
II Reducing the temperature
III Using iron powder as catalyst
A I and II only C II and III only
B I and III only D I, II and III
7. Which of the following is not one of the
uses of ammonia?
A To produce household cleaners
B To produce nitric acid
C To produce rubber
D To kill germs
8. Which of the following are needed fo
the production of ammonia?
A Hydrogen and oxygen
BNitrogen and oxygenC Hydrogen and nitrogen
D Carbon dioxide and hydrogen
9. Urea can be produced from the reactio
between
A hydrogen and nitrogen.
B hydrogen and water.
C ammonia and carbon dioxide.
D nitrogen and oxygen
10. Which of the following steps can be
taken to control the disposal of indust
waste in order to avoid pollution?
I Enforcement of existing laws
II Application of technologyIII Recycling of waste
A I and II only
B I and III only
C II and III only
D I, II and III
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Structured Questions
1. Diagram 1 shows the arrangement of atoms in iron.
Diagram 1
(a) (i) Describe the arrangement of atoms in iron.
(ii) Based on your answer in (i), explain why iron is malleable.
(b) Suggest a way to make iron stronger.
(c) Why is steel stronger than iron?
(d) Draw, in the space given below, the arrangement of particles in steel.
(e) State one purpose of producing alloys, other than to make metals stronger.
2. Diagram 2 shows the production of ammonia by the Haber process.
Temperature: yCPressure: 200 atm
Catalyst: Z
Gas X
Nitrogen
Ammonia
Diagram 2
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(a) Name what is represented by each of the following in the diagram.
(i) GasX :
(ii) yC :
(iii) Z :
(b) Ammonium salts are the most common articial fertilisers.
Name twosubstances used to produce ammonium nitrate.
(c) State two uses of ammonia, other than to produce fertilisers.
(i)
(ii)