KUULCHAT
SCIENCE MOCK
OBJECTIVE TEST
1.
How much work is done when a kerosene tin is pushed with a force of 20 N through a distance of 2 m?
A.
0.01 J
B.
0.10 J
C.
10.0 J
D.
20.0 J
E.
40.0 J
Answer: E
Work done = Force x Distance
Force = 20 N
Distance = 2 m
Work done = 20 N x 2 m = 40 J
2.
The S.I unit for density is
A.
ms-1
B.
ms-2
C.
kg m-3
D.
m3kg-1
Answer: C
3.
Which of the following solvents can be used to remove grease from the hand?
A.
Alcohol.
B.
Palm kernel oil.
C.
Turpentine.
D.
Water.
Answer: C
4.
The process of removing unproductive poultry birds from a flock is referred to as
A.
candling
B.
culling
C.
dehorning
D.
drenching
Answer: B
5.
The figure below shows a simple electric circuit.
Use it to answer the question below.
The purpose of the component labelled IV is to
A.
supply energy to the circuit.
B.
measure the voltage of the battery.
C.
prevent too much current from flowing.
D.
close the circuit.
Answer: C
6.
Which of the following life processes is represented by the equation below?
Glucose + Oxygen → Water + Carbon dioxide + Energy
A.
Digestion
B.
Excretion
C.
Photosynthesis
D.
Respiration
Answer: D
Respiration Equation
C6H12O6 + 6O2 → 6H2O + 6CO2 + ATP (Energy)
Glucose + Oxygen → Water + Carbon dioxide + Energy
7.
A dam for generating power is constructed across a river. What type of energy is possessed by the water behind the dam?
A.
Kinetic energy
B.
Potential energy
C.
Electrical energy
D.
Heat energy
E.
Light energy
Answer: B
8.
The dry season in Ghana is mainly from
A.
January to March
B.
April to June
C.
July to September
D.
October to December
Answer: A
The dry season is the period where there is very little or no rainfall. In the southern part of Ghana, the dry season occurs between November to February. The period is much longer in the Northern part which occurs between November to June.
9.
The embryo of a mammal develops from
A.
eggs fertilized inside the body.
B.
eggs fertilized outside the body.
C.
self fertilized eggs.
D.
only female sex cells.
Answer: A
10.
Most machines waste energy because of
A.
old age
B.
force
C.
friction
D.
load
E.
too much effort
Answer: C
11.
A simple way of maintaining the efficiency of a machine is by
A.
oiling its parts.
B.
fitting new parts on the machine.
C.
making sure it is always working.
D.
making sure it works at low speed.
Answer: A
Friction reduces the efficiency of the machine as part of the work input is used to overcome friction. Oiling the parts reduces the friction thereby increasing the efficiency of the machine.
12.
A substance is termed combustible if it
A.
easily catches fire.
B.
dissolve common salt.
C.
sublimes at room temperature.
D.
boils at 100oC.
Answer: A
13.
A fuse is connected in an electric circuit to
A.
prevent electric shock.
B.
increase the current.
C.
prevent current from increasing.
D.
increase the heat generated.
Answer: C
A fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. It is designed to melt and separate in the event of excessive current thereby stopping or interrupting the current.
14.
The male sperms fertilize the female eggs to form the
A.
embryo
B.
ovary
C.
ovum
D.
placenta
E.
uterus
Answer: A
15.
Which of the following is not characteristic of all living organisms? The ability to
A.
break down food to obtain energy
B.
produce food using the sun’s energy
C.
make use of food nutrients to grow
D.
respond to changes within the environment
E.
give rise to young new individuals
Answer: B
16.
Birds are able to fly because they have
A.
hollow bones
B.
web legs
C.
tail feathers
D.
flat chest
E.
wide eyes
Answer: A
17.
Oxygen is made available to all cells of the human body by the
A.
plasma.
B.
platelets.
C.
white blood cells.
D.
red blood cells.
Answer: D
18.
How many days does the moon take to go round the earth.
A.
31
B.
30
C.
29
D.
27
Answer: C
19.
Which of the following substances is a salt?
A.
H2SO4
B.
NaOH
C.
HCl
D.
CaCl2
Answer: D
20.
What is the average body temperature of a healthy person?
A.
25°C
B.
36°C
C.
37°C
D.
38°C
E.
39°C
Answer: C
21.
Which of the following source(s) of energy is/are renewable?
I. Solar
II. Crude oil
III. Wind
A.
I only
B.
I and II only
C.
I and III ONLY
D.
I, II and III
Answer: C
22.
A non-reactive metal can be identified from other metals because its surface is
A.
hard.
B.
shiny.
C.
smooth.
D.
rough.
Answer: B
23.
The image formed by a plane mirror is always
A.
real.
B.
magnified.
C.
inverted.
D.
virtual.
Answer: D
Characteristics of an image formed by a plane mirror
The image:
1. has same size as object
2. is virtual
3. is laterally inverted
4. distance equal to the object distance from the mirror
5. is erect or upright
24.
Which of the following management practices greatly helps in record keeping?
A.
Culling
B.
Debeaking
C.
Dehorning
D.
Identification
Answer: D
25.
The substances which help in the digestion of food materials are called
A.
enzymes.
B.
hormones.
C.
lymph.
D.
mucus.
E.
plasma.
Answer: A
26.
Canned foods and drinks have expiry dates on them. The hazard involved in taking an expired drink is
A.
food poisoning.
B.
impaired hearing.
C.
poor circulation of blood.
D.
suffocation.
Answer: A
27.
Beriberi is caused by deficiency of vitamin
A.
A.
B.
B.
C.
E.
D.
K.
Answer: B
28.
Which of the following chemical equations is balanced?
A.
H2 + Cl2 → HCl
B.
K2O → K + O2
C.
Mg + O2 → MgO
D.
2Na + Cl2 → 2NaCl
Answer: D
Number of Na at left = 2 (2 x 1) and at the right = 2 (2 x 1)
Number of Cl at left = 2 and at the right = 2 (2 x 1)
Since the number of elements at each side of the equation is the same, the equation is balanced
29.
The unit of potential difference
A.
ampere
B.
watt
C.
ohm
D.
volt
Answer: D
Unit of potential difference is joule per coulomb, given the name volt (V) after Alessandro Volta. The familiar term voltage is the common name for electric potential difference. Keep in mind that whenever a voltage is quoted, it is understood to be the potential between two points.
30.
The practice of starting new organization in response to identified opportunities is termed
A.
agribusiness.
B.
business enterprise.
C.
entrepreneurship.
D.
management.
Answer: C
31.
An example of a body that does not produce its own light is the
A.
moon.
B.
sun.
C.
star.
D.
fire fly.
Answer: A
32.
Use the information below to answer the question that follow.
A solid X reacted with a liquid Y to form a salt and water only. A portion of liquid Y turned blue litmus paper red. Solid X did not dissolve when a portion of it was placed in water and stirred.
Liquid Y is
A.
an acid.
B.
an alkali.
C.
a base.
D.
a metal.
Answer: A
33.
In modern electrical wirings the colour code for the live wire is
A.
blue.
B.
brown.
C.
green.
D.
green and yellow.
Answer: B
34.
Chinchilla is a breed of
A.
goats.
B.
pigs.
C.
rabbits.
D.
sheep.
Answer: C
35.
Which of the following human activities pollutes the environment?
I. Release of cement dust into the atmosphere
II. Dumping of refuse into water bodies
III. Burning of rubbish
A.
I and II only
B.
II and III only
C.
I and III only
D.
I, II and III
Answer: D
36.
Fish swims in water with little resistance because it possesses
A.
gills.
B.
scales.
C.
caudal fins.
D.
streamlined body.
Answer: D
37.
A breeding female pig is called a
A.
doe.
B.
gilt.
C.
heifer.
D.
sow.
Answer: D
38.
The solid component found on the filter paper and the liquid component that flows into a container during filtration are respectively called
A.
filtrate and residue.
B.
condensate and residue.
C.
residue and filtrate.
D.
residue and condensate
Answer: C
The solid that remains on the filter paper is called the residue, and the liquid that passes through the filter paper is called the filtrate
39.
Arteries are blood vessels which carry
A.
blood to the heart.
B.
carbon dioxide to the air.
C.
blood away from the art.
D.
oxygen to the lungs.
Answer: C
40.
Which of the following organisms attacks crops in storage?
A.
Crickets
B.
Grasshoppers
C.
Millipedes
D.
Weevils
Answer: D
A storage pest is an insect or other animal that damages or destroys stored food or other stored valuable organic matter.
Grain borers, weevils and Angoumois grain moths are able to feed on whole, healthy grains, they are considered storage pests
THEORY QUESTIONS
1.
(a)
(i)
State two reasons which indicate that respiration and burning are similar processes.
(ii)
What is cross-pollination?
(iii)
List four methods by which cholera can be controlled and prevented.
(b)
(i)
Name the three coldest planets.
(ii)
State one reason which accounts for the coldness of the planets you have stated.
(iii)
An object of mass 150 g occupies a volume of 250 cm3. Calculate its density.
(c)
Name a suitable solvent for each of the following substances
(i)
grease
(ii)
oil paint
(iii)
alcohol
(iv)
sugar
(a)
(i)
Reasons which indicate that respiration and burning are similar processes
1. Both processes require oxygen/air to function
2. Both release energy whenever they occur
3. Both are chemical changes/involve the use of energy
(ii)
Cross-pollinationis the transfer of pollen grains from the anther of a flower to the stigma of another flower on another plant of the same species.
(iii)
Methods by which cholera can be controlled and prevented
1. Drinking of pure/boiled water
2. Burying/destroying/covering of excreta/faeces (of cholera patients)
3. Covering of food/keeping food in safes
4. Avoid eating raw vegetables or fruits which have not been washed properly
5. Eating hot foods or avoid eating cold foods
6. Washing hands after attending nature's call
7. Immunization/vaccination
(b)
(i)
Three coldest planets
1. Uranus
2. Neptune
3. Pluto
(ii)
The planets are cold because they are far away from the sun.
(iii)
Density =
Mass = 150 g
Volume = 250 cm3
Density =
Density = 0.6 gcm-3
(c)
(i)
Suitable solvents for grease
1. Kerosene
2. Petrol
(ii)
Suitable solvents for oil paint
1. Kerosene
2. Turpentine
3. Petrol
(iii)
Suitable solvent for alcohol
Water
(iv)
Suitable solvent for sugar
Water
2.
(a)
(i)
Name the stages in the life cycle of a mosquito.
(ii)
Name the stage at which feeding does not take place.
(b)
Explain briefly why air is regarded as a mixture.
(c)
(i)
What is a magnetic pole?
(ii)
State two uses of temporary magnets.
(d)
Give four reasons for planting crops in rows.
(a)
(i)
Stages in the life-cycle of a mosquito
1. Egg
2. Larva
3. Pupa
4. Adult
(ii)
Stage at which feeding does not take place
Pupa
(b)
Why air is considered as a mixture
Contains different elements which are physically combined.
Consist of different substances which can be separated by physical means/methods
(c)
(i)
Magnetic pole
Point/area on a magnet where the magnetic force is greatest or where all lines of force appear to enter.
(ii)
Uses of temporary magnets
1. Loudspeaker
2. Electric bell
3. Telephone earpiece
4. Generators/electric motors
(d)
Reasons for planting crops in rows
1. Facilitate easy movement on the farm
2. It improves drainage
3. It's easy to replace ungerminated seeds
4. It keeps plant roots evenly spaced
5. Enable larger plant population per unit of plot
6. Easy to know plant population on the farm
7. Better access to sunlight
8. For easy control of pest
9. For easy control of diseases
10. Allow free movement of air
3.
(a)
Figure 1(a) is an illustration of a natural cycle showing unnamed stages and processes labelled A, B, C and D with processes labelled P, Q, S and T. Study the figure carefully and answer the questions that follow.
(i)
Name each of the stages labelled A, B, C and D.
(ii)
Name each of the processes labelled P, S and T.
(iii)
State three activities of humans that could disrupt the cycle.
[10 marks]
(b)
Figure 1(b) is an illustration of two types of farming systems practised in Ghana labelled K and L.
System K represents four farmlands labelled A, B, C and D and the arrows indicate movement of the farmer over a period of time as shown.
System L, represents a farmland divided into four plots 1, 2, 3 and 4 and the arrows indicate the movement of the crops cultivated over the period.
Study the figure carefully and answer the questions that follow.
(i)
Name each of the farming systems labelled K and L
(ii)
Give the reason for each of the names given in (i).
(iii)
State two ways in which the farming system K is of importance to the farmer.
(iv)
Give three reasons why the farming system K is not being encouraged in recent times.
(v)
Name one type of crop that could be included in the farmland L to improve the fertility of the soil.
[10 marks]
(c)
Figure 1(c) is an illustration of a mason pulling a slab by means of a rope up an inclined plane. The labels I, II and III represent forces acting on the slab.
Study the figure carefully and answer the questions that follow.
(i)
Give three examples of the use of inclined planes in everyday life.
(ii)
Given that I is 400 N and moves a distance of 10 m whiles II is 100 N and moves a distance of 5 m, calculate the
(α)
work output;
(β)
work input;
(γ)
efficiency.
[10 marks]
(d)
Figure 1(d) is an illustration of experimental set-ups A and B used to demonstrate a scientific principle.
Study the figure carefully and answer the questions that follow.
(i)
Name the scientific principle being demonstrated in both A and B.
(ii)
Describe briefly the functions of each of the parts labelled II and VI.
(iii)
Name any two types of materials that could be present in each of the set-ups labelled:
(α)
III;
(β)
VII.
(iv)
Give the reason why the direction of water flow in A must not be reversed.
[10 marks]
(a)
(i)
A → Plants
B → Carbon dioxide in the atmosphere
C → Animals
D → Dead/decaying organisms/organic matter
4 @ 1 mark each = 4 marks
(ii)
P → Photosynthesis
S → Decay/decomposition
T → Combustion/burning
3 @ 1 mark each = 3 marks
(iii)
Activities of humans that could disrupt the cycle
1. Raising of livestock
2. Growing of crops
3. Burning of wood
4. Burning of fossil fuels/coal/industrial pollution
5. Reducing amount of forest cover/deforestation
Any 3 x 1 = 3 marks
(b)
(i)
K → Land rotation
L → Crop rotation
2 @ 1 mark each = 2 marks
(ii)
Reason for K
The farmer moves from one farmland to another
Reason for L
The farmer moves/rotates the crops from one plot to another
2 @ 1 mark each = 2 marks
(iii)
Ways in which the farming system K is of importance to the farmer
1. The soil regains its fertility/prevents soil exhaustion
2. There is control in the build-up pests and diseases
3. It helps to maintain good yield
4. Saves money
Any 2 x 1 = 2 marks
(iv)
Reasons why the farming system K is not being encouraged in recent times
1. Time, energy and money is wasted in clearing new land each time land is abandoned.
2. System does not encourage large scale farming
3. There is rampant deforestation
4. Cultivated lands are generally small and scattered
5. Land is getting scarce/a growing population
Any 3 x 1 = 3 marks
(v)
Leguminous crops
1 mark
(c)
(i)
Examples of the use of inclined planes in everyday life
1. Stair case
2. Ladder
3. Plank of wood at an angle
4. Hill
5. Ramps
6. Screws
Any 3 x 1 = 3 marks
(ii)
(α)
Work output = Load x Load distance (1 mark)
Work output = 100 x 5
Work output = 500 J (1 mark)
(β)
Work input = Effort x Effort distance (1 mark)
Work input = 400 x 10
Work input = 4000 J (1 mark)
(γ)
Efficiency = x 100% (1 mark)
Efficiency = x 100% (1 mark)
Efficiency = 12.5% (1 mark)
Notes:
1. The zeros (0) in 500 and 4000 cancel each other
2. The zeros (0) in 40 and 100 cancel each other
3. 2 divides 4, 2 times and 10, 5 times
4. = = 12.5
(d)
(i)
Separation of mixtures
1 mark
(ii)
II
Cools the vaporized components of the mixture (1 mark) back to liquid (1 mark)
VI
Bar magnet attracts the magnetic material of the components of a mixture (1 mark) in order to separate it from the non-magnetic component (1 mark)
(iii)
(α)
III
1. Alcohol/ethanol and water
2. Kerosene and diesel oil
Any 1 x 2 marks = 2 marks
(β)
VII
Iron filings and powdered Sulphur
2 marks
(iv)
To ensure complete condensation of the vapour
1 mark
4.
(a)
State four ways by which plants are able to protect themselves against animals.
(b)
(i)
Define pollination.
(ii)
List four features of insect pollinated flowers.
(c)
An atom has three protons and three neutrons.
(i)
How many electrons are there in this atom?
(ii)
Draw a labeled diagram to show the arrangement of all the particles in the atom.
(d)
A body of mass 12.0 kg is placed on an orange tree 20.0 m above the ground
(i)
Calculate its potential energy with respect to the ground
(ii)
If the body is released from this height, what will be its kinetic energy just before it hits the ground.
[g = 10 ms-2]
(a)
Ways by which plants protect themselves against animals
1. Secretion of unpleasant liquids which make them distasteful
2. Possession of poisonous parts which cause pain/itching/death/swelling on contact
3. Possession of spines/thorns/irritating hairs which cause pain/irritation on contact
4. Possession of sticky substances which stick in the mouth of animals which try to feed on them
5. Possession/production of unpleasant smell/scent which drives off animals which try to feed on them
(b)
(i)
Pollination is the transfer of pollen grains from the anther of a flower to the stigma of the flower or another flower of the same species.
(ii)
Features of insect pollinated flowers
1. Petals are large
2. Petals are brightly coloured
3. The flower is usually scented
4. The flower has nectar
5. Stigma is inside the flower
6. Stigma is compact and sticky
7. Pollen grains produced per anther are few
8. Pollen grains are sticky, large, rough and heavy
9. Filaments are short and stout
(c)
(i)
Number of protons = 3
Number of neutrons = 3
Number of electrons = Number of protons
Number of electrons = 3
(ii)
(d)
(i)
Potential energy = Mass (m) x Acceleration due to gravity (g) x Height (h)
Mass = 12.0 kg
Acceleration due to gravity (g) = 10 ms-2
Height = 20 m
Potential energy = 12.0 kg x 10 ms-2 x 20 m
Potential energy = 2400 J
(ii)
Before the body just hit the ground, the potential energy is converted to kinetic energy
∴ Kinetic energy = Potential energy
Kinetic energy = 2400 J
5.
a)
i)
What is a satellite?
ii)
Give three uses of artificial satellites.
b)
State the composition of each of the following alloys:
i)
Brass
ii)
Steel
iii)
Bronze
c)
Name three cultural practices used in vegetable production.
d)
List four parts of the respiratory system in humans.
a)
i)
A satellite is an object that moves around a larger object in space.
OR
A satellite is an artificial body placed in orbit round the earth or another planet.
ii)
Uses of artificial satellite
1. For exploring the planets/moons
2. For scientific research/experimental research/internet
3. To study the universe
4. For communications/broadcasting/telephone call
5. For weather forecast/collecting information on the weather
6. Map making
7. Spying
8. For navigation/satellite for navigation
9. Military purposes
b)
Composition of alloys
i)
Brass → Copper and zinc
ii)
Steel → Iron and carbon
iii)
Bronze → Copper and tin
c)
Cultural practices used in vegetable production
1. Watering/irrigation
2. Application of fertilizer
3. Stirring
4. Weeding/weed control
5. Mulching
6. Staking
7. Prunning
8. Pest control
9. Disease control
10. Drainage
11. Earthing-up
12. Decrusting
13. Supplying
14. Garden layout
d)
Parts of the respiratory system in humans
1. Nostril
2. Nasal cavity
3. Pharynx
4. Larynx/voice box
5. Trachea/windpipe
6. Lungs
7. Diaphram
8. Bronchi
9. Bronchioles
9. Alveoli/airsacs
6.
(a)
(i)
What is germination of seed?
(ii)
State two conditions necessary for the germination of seed.
(b)
State four methods used in identifying farm animals.
(c)
Explain why it is easier to cut a piece of yam with a sharp knife than with a blunt knife.
(d)
State three differences between a metal and a non-metal.
(a)
(i)
Germination of seed is the sprouting/growth/development of the embryo/seed to produce a new plant/seedling.
(ii)
Conditions necessary for the germination of seed
1. Nature of seed coat
2. Water/moisture
3. Air/Oxygen
4. Suitable/optimum temperature/warmth
5. Viability of the seed
6. Enzymes
7. Sunlight/light
8. Dormancy period
(b)
Methods used in identifying farm animals
1. Tattooing
2. Banding
3. Ear tagging
4. Clipping
5. Leg tagging
6. Dyeing
7. Ear notching/punching
8. Implantation of microchips/radio transmitter
(c)
Why it is easier to cut a piece of yam with a sharp knife than with a blunt knife
Pressure is inversely proportional to the surface area.
Pressure =
Pressure ∝
With the same force, the smaller the surface area, the greater the pressure.
A sharp knife has a smaller surface area than a blunt knife. The same force used on each knife, will give greater pressure on the sharp knife than the blunt knife (smaller pressure) making cutting easier.
(d)
Differences between a metal and a non-metal
| # | Metal | Non-metal |
| 1. | Normally solid | Can be solid or liquid or gas |
| 2. | Corrosive | Non corrosive |
| 3. | Attracted by magnet | Not attracted by magnet |
| 4. | Conducts electricity | Does not conduct electricity/poor conductor of electricity |
| 5. | Conducts heat/good conductor of heat | Does not conduct heat/poor conductor of heat |
| 6. | Malleable | Not malleable |
| 7. | Ductile | Not ductile/Brittle |
| 8. | High density | Low density |
| 9. | High melting point | Low melting point |
| 10. | Has shinning/lustre surface | Has dull surface |
| 11. | Gives out electrons (forms cations) as reducing agent | Receives/accepts electrons (forms anions) as oxidizing agent |
| 12. | High tensile strength | Low tensile strength |