1.
Chlorine gas is passed through water during filtration to
kill germs.
cause suspended particles to settle.
soften the water.
give taste to the water.
Answer: A
2.
Which of the following pairs of structures are parts of the respiratory system of humans?
Fallopian tube and alveoli
Pharynx and esophagus
Trachea and alveoli
Trachea and duodenum
Answer: C
3.
Which of the following vegetable crops is cultivated for its leaves?
Carrot.
Lettuce.
Okro.
Pepper.
Answer: B
4.
The type of energy obtained when an electric bulb is connected to a batter is
chemical energy.
electrical energy.
light energy.
magnetic energy.
Answer: C
5.
The base of the N-P-N transistor normally
is a p-type semi conductor.
is an n-type semi conductor.
is undoped semi conductor.
have electrons as majority charge carriers.
Answer: A
6.
The humidity of the atmosphere is measured with
an anemometer.
a barometer.
a hygrometer.
a hydrometer.
Answer: C
Anemometer → Wind Speed
Barometer → Atmospheric Pressure
Hygrometer → Humidity
Hydrometer → Density of liquids
7.
The atom of an element has 4 protons and 5 neutrons in its nucleus. How many shells are occupied in the atom?
1
2
3
4
5
Answer: B
The number of protons equals the number of electrons in a neutral atom.
Since there are 4 protons, the number of electrons is also 4
The first shell of an atom takes a maximum of 2 electrons and the subsequent shells take maximum of 8 electrons
For 4 electrons, the first shell will take 2 electrons and the second shell will take the remaining 2 electrons.
Hence the atom has 2 shells.
8.
Which of the following heart conditions in humans is caused by plaque deposits in the arteries?
Atherosclerosis
Heart attack
Heart failure
Stroke
Answer: A
Atherosclerosis is a disease where plaque, made up of cholesterol, fat, and other substances, builds up in the arteries, narrowing them and potentially blocking blood flow. This can lead to serious health issues like heart attacks and strokes.
9.
Weeds on a school farm could be controlled by
handpicking
mowing
ploughing
tilling
Answer: A
10.
A rigid bar which is capable of turning about a fixed point is a/an
inclined plane.
lever.
screw.
wheel and axle.
Answer: B
11.
Which of the following processes result(s) in the formation of a new substance?
I. Burning of wood
II. Rusting of iron nail
III. Heating water into vapour
I only
I and II only
II and III only
I, II and III
Answer: B
I and II are chemical changes. For chemical change, new substances are formed and the process is not reversible.
12.
Which of the following is the percentage composition of oxygen in the air?
0.03
1
21
78
Answer: C
13.
All the following substances are mixtures except
ink
blood
air
palm wine
carbon dioxide
Answer: E
14.
When the p-n junction of a transistor is reversed biased
current flows from the p-type to the n-type.
no current flows from the p-type to the n-type.
conduction of current occurs.
current flows from the n-type to the p-type.
Answer: B
15.
The work done by force of 20 N on a body is 60 J. Calculate the distance through which the force moved
8.0 m
4.0 m
3.0 m
2.0 m
Answer: C
Work done = Force x Distance
Distance =
Work done = 60 J
Force = 20 N
Distance = = 3 m
16.
Brass is an alloy made up of
Aluminium and zinc
Copper and tin
Copper and zinc
Iron and carbon
Answer: C
17.
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.
If red litmus paper is placed in liquid Y, the colour of the paper will
remain the same.
change to blue.
change to purple.
become brighter.
Answer: A
18.
The force that binds molecules of the same substances together is called
adhesion.
cohesion.
capillary action.
surface tension.
Answer: B
Difference between adhesive and cohesive force
Cohesive force is the force that attracts molecules of the same substance while Adhesive force is the force that binds molecules of different substances together.
Why water wets glass
Water wets glass and spreads out on it because the adhesive forces between the liquid and the glass are stronger than the cohesive forces within the water.
19.
Am example of soil micro-nutrients is
copper.
calcium.
phosphorus.
potassium.
Answer: A
20.
Which of the following substances is a compound?
Hydrogen
Nitrogen
Oxygen
Sulphur
Water
Answer: E
Compounds are made up of two or more different elements. All the options except water are elements/atoms.
The chemical formula of water is H2O which is made up of hydrogen and oxygen atoms (Two different elements).
21.
Which of the following statements about acids correct
I. They react with the calcium carbonate to give a gas
II. They turn red litmus paper blue
III. They react with reactive metals to give a gas
IV. They turn blue litmus paper red
I, II and IV only
I, II and III only
II, III and IV only
D. I, III and IV
Answer: D
An acid is a substance that donates protons (in the Brønsted-Lowry definition) or accepts a pair of valence electrons to form a bond (in the Lewis definition). acid, any substance that in water solution tastes sour, changes the color of certain indicators (e.g., reddens blue litmus paper), reacts with some metals (e.g., iron) to liberate hydrogen, reacts with bases to form salts, They react with the calcium carbonate to give a gas and promotes certain chemical reactions (acid catalysis).
22.
The S.I unit for density is
ms-1
ms-2
kg m-3
m3kg-1
Answer: C
23.
A fuse is used in an electrical circuit to
measure the energy used up.
protect appliances.
provide more current.
make sure current flows continuously.
Answer: B
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.
24.
Which of the following is not a function of the lens in the human eye? It
allows light rays to pass through it
refracts the light rays passing through it
helps to focus the image onto the retina
becomes thinner when focusing a distant object
Answer: E
25.
A meal containing all the essential nutrients in the right amounts is said to be
delicious.
balanced.
well-cooked.
rich in fibre.
Answer: B
26.
Clayey soil holds more water than any other type of soil because it has
large particle size.
large air spaces.
irregular particle size.
greater attraction for water.
reduced air spaces.
Answer: E
27.
A poultry farmer observed that the layers were producing thin-shelled eggs.
Use this information to answer the question below
What ingredient could be added to the feed to correct the defect?
Maize
Soya bean meal
Cowpea
Oyster shell meal
Answer: D
The defect is mostly caused by deficiency of calcium and can be corrected by feeding the layers with meal containing calcium.
28.
Which of the following statements about friction is not true?
It wears off materials
It produces heat
It opposes motion
It increases speed
Answer: D
29.
Which of the following diseases is contracted through infected wounds?
Chicken pox
Diphtheria
Mumps
Tetanus.
Whooping cough.
Answer: D
30.
Which of the following conditions describes a first class lever?
The load is between the effort and pivot
The pivot is between the effort and the load
The effort is between the pivot and the load
The load arm is equal to the effort arm
Answer: B
First class → Pivot/Fulcrum at the middle
Second class → Load at the middle
Third class → Effort at the middle
In summary PLE which is the last three letters of PEOPLE if you may forget in an examination.
31.
Which of the following statements about light is true?
Light is reflected from polished surfaces
Light travels through opaque objects
Light passes through plane mirrors
The angle of incidence is between the normal and the reflected ray
The speed of light is less than that of sound
Answer: A
32.
What sickness are you likely to be suffering from when you have blood in your urine?
Typhoid
Syphilis
Cholera
Bilharzia
Answer: D
33.
Which of the following seeds is dispersed by explosive mechanism?
Coconut
Cotton
Okro
Orange
Answer: C
34.
Which of the following factors contribute to early parenthood?
I. Illiteracy
II. Poverty
III. Peer pressure
IV. Lack of parental care
I and II only
II and III only
III and IV only
I, II, III and IV
Answer: D
35.
The term used to describe a rabbit giving birth is
culling.
dubbing.
kindling.
weaning.
Answer: C
36.
The reason for chewing food before swallowing is to
soften the food
make digestion faster
cause saliva to flow out
exercise the jaws
Answer: A
37.
The daily variation of atmospheric conditions is called
climate.
weather.
season.
humidity.
Answer: B
38.
Soil aeration can be improved by
Adding mineral to the soil
Application of fertilizer to the soil
Weathering
Activities of earthworms
Manuring
Answer: D
39.
Which of the following parts of the tooth is embedded in the jaw bone?
Gum
Neck
Root
Crown
Answer: C

A tooth consists of three main parts, the crown, the root and the neck.
The crown is the part of tooth that shows above the gum.
The root is the part buried in the jawbone.
The point where the crown and the root meet is the neck of the tooth.
40.
Energy stored in food is referred to as
chemical energy.
heat energy.
solar energy.
kinetic energy.
Answer: A
(a)
In an experiment, four nails 1, 2, 3 and 4 are fixed with candle wax onto a metal bar and one end of bar is heated by means of boiling water as shown in the diagram below.

A, B, C and D are thermometers inserted in holes along the bar to measure the temperatures at the various points.
(i)
What is the temperature of the boiling water?
(ii)
State the observations that will be made about nails 1, 2, 3 and 4.
(iii)
State the observations that will be made about the temperature recorded by thermometers A, B, C and D.
(iv)
What mode of heat transfer is demonstrated in the experiment?
(v)
State one effect of heat that is associated with the experiment.
(vi)
State the aim of the experiment.
(b)
In an experiment, a student took three iron nails and cleaned their surfaces dry and placed them in three separate test tubes in set-ups A, B and C as shown in the diagram. After three days the nail in set-up A was found to have rusted while the nails in set-ups B and C did not.

Answer the following questions:
(i)
Why was the water in set-up B boiled?
(ii)
Explain the function of the oil on top of the water in set-up B.
(iii)
State the purpose of the rubber stopper in set-up C.
(iv)
Why did the nail in set-up A rust?
(v)
Suggest an aim for the experiment.
(vi)
From the experiment, explain why oil or grease is applied on the surface of a metal to prevent rusting.
(c)
In an experiment, the following activities were carried out on two green leaves A and B.
Leaf A was from a plant placed in the sunlight for sometime while leaf B was from a plant placed in a dark cupboard for 24 hours.
| Activity |
|
I. Leaves dipped in boiling water for 1 minute II. Leaves dipped in warm alcohol III. Leaves washed in cold water IV. Leaves dipped into iodine solution |
After dipping the iodine solution, it was observed that leaf A changed colour while leaf B did not change colour.
Answer the following questions:
(i)
Explain why each of the activities I, II, III and IV was carried out.
(ii)
State the colour change of leaf A.
(iii)
Explain why leaf A changed colour but leaf B did not.
(iv)
Suggest an aim for the experiment.
(a)
(i)
Temperature of boiling water
100o C or 373 K or 212oF
(ii)
Nail 1 will fall off first followed by nail 2, 3 and 4 in that order.
(iii)
A will have the highest temperature followed by B then C and D will have the lowest temperature.
(iv)
Conduction
(v)
Effects of heat that is associated with the experiment
1. Heat transfer
2. Wax melts/water vaporizes
3. Expansion of metal/water
4. Decrease in density for metal/water
5. Water evaporates faster
(vi)
Aim of the experiment
To show that metals are good conductors of heat
OR
Heat travels through metals
(b)
(i)
To remove air/oxygen
(ii)
The oil on top of the water in set-up B is to prevent air/oxygen from dissolving back into the water.
(iii)
The purpose of the rubber stopper in set-up C is to prevent water/moisture from entering the test tube.
(iv)
The nail in set-up A rust because oxygen/air and water/moisture were present.
(v)
Aim for the experiment
To show that air/oxygen and water/moisture are necessary for rusting to take place.
(vi)
Oil or grease prevents air/oxygen and water/moisture from coming into contact with the metal for rusting to occur.
(c)
(i)
I → To kill the cells of the leaf/to stop all chemical reactions in the leaf
II → To decolorize the leaf/to remove the green pigment/chlorophyll from the leaf
III → To soften the leaf/remove or wash off alcohol from the leaf
IV → To test for the presence of starch in the leaf
(ii)
Leaf A changes from whitish/brownish to blue-black.
(iii)
Leaf A was in sunlight and therefore photosynthesis occurred but leaft B was in darkness so photosynthesis did not occur.
OR
Leaf A produced starch but leaf B did not produce starch.
(iv)
Aim for the experiment
To show that sunlight was necessary/important for photosynthesis/starch formation to occur.
(a)
List the three particles which make up matter.
(b)
State four hereditary features in humans.
(c)
State the energy transformation that takes place in each of the following activities:
(i)
dry cell in use;
(ii)
solar panel in use;
(iii)
electric stove in use;
(iv)
hammering of a piece of metal.
(d)
State two ways each in which each of the following cultural practices is important in vegetable production:
(i)
staking;
(ii)
pruning.
(a)
The three particles which make up matter
1. Atoms
2. Molecules
3. Ions
(b)
Hereditary features in humans
1. Weight
2. Intelligence
3. Colour of the skin
4. Ability to roll the tongue
5. Temperature
6. Height/stature of an individual
7. Colour of eyes
8. Colour of hair
9. Blood group
10. Shape of face/nose/head/eye
11. Haemophilia
12. Albinism
(c)
Energy transformations
(i)
Dry cell in use
Chemical energy → Electrical energy
(ii)
Solar panel in use
Light energy → Electrical energy
(iii)
Electric stove in use
Electrical energy → Heat energy
(iv)
Hammering of a piece of metal
Chemical → Potential → Kinetic → Heat/Light/Sound
OR
Chemical → Mechanical → Heat/Light/Sound
OR
Chemical → Kinetic → Heat/Light/Sound
(d)
(i)
Ways in which staking is important in vegetable production
1. It supports weak/climbing stems
2. Promotes air circulation
3. Allow for easy penetrating of sunlight
4. Helps to produce clean fruits
5. It helps protects fruits from diseases/pest
6. Cultural practices such as weeding and spraying can easily be carried out
7. It facilitates harvesting
8. It reduces/minimuzes/prevents fruits from diseases/rot
9. Improves fruit quality
10. Supports plants during strong winds
(ii)
Ways in which pruning is important in vegetable production
1. It encourages easy harvesting
2. It improves air circulation in the farm
3. It promotes light penetration
4. It checks the spread of diseases
5. It prevents the spread of pests
6. It promotes the production of bigger fruits
7. It beautifies ornamental plants
8. It aids clearing of weeds
a)
i)
What is an acid?
ii)
Give two difference between an acid and a base, in terms of taste and feel.
b)
i)
Define pressure.
ii)
A force of 200N is exerted on an area of 50m2. Calculate the pressure exerted by the force.
c)
Explain the following terms as associated with living organisms.
i)
unicellullar;
ii)
multicellullar.
d)
Give two reasons why soil air is important.
a)
i)
An acid is a proton donor
OR
An acid is a substance/compound that produces excess hydrogen ion (H+) in water.
An acid is a substance that contains replaceable hydrogen.
ii)
Differences between an acide and a base
| Acid | Base | |
| Taste | Sour | Bitter |
| Feel | Non slippery or stinging | Slippery or soapy |
| Litmus paper | Turns blue litmus paper red | Turns red litmus paper blue |
| pH | below 7 | Above 7 |
| In water | Gives Hydrogen ion (H+) | Gives Hydroxyl (Hydroxide) ion (OH-) |
| Proton | Donates proton when dissolved in water | Accepts proton when dissolved in water |
b)
i)
Pressure is force per unit area or the force acting (normally) per unit area
OR
Pressure =
ii)
Pressure =
Force = 200 N
Area = 50 m2
Pressure =
Pressure = 4 Nm-2 or 4 Pa
c)
i)
Unicellular is a living organism that consists of only once cell.
ii)
Multicellular, living organisms that consist of many cells.
d)
Reasons why soil air is important
1. It enhances absorption of mineral salts or nutrients by plant roots
2. It enhances the absorption of water by plant roots
3. It makes oxygen available for seed germination
4. Presence of aeration prevents the formation of toxic/acidic substances in the soil by micro organisms
5. Plant roots use soil air for respiration/metabolism or growth
6. Soil micro organisms use soil air for respiration
7. Air is required for the decomposition of organic matter
8. Aeration is required to prevent development of plant diseases
a)
i)
Define photosynthesis.
ii)
Give two ways in which photosynthesis is important to animals.
b)
Name three sources of chemical energy.
c)
Describe how you would separate a mixture of sodium chloride and sand.
d)
Complete and balance the following chemical reaction:
CaCO3 + HCl →
e)
Two dry cells, a switch and a bulb are connected in series. Draw and label a circuit diagram of the arrangement.
a)
i)
Photosynthesis is a process whereby green plants containing chlorophyll manufacture food/carbohydrates/starch/glucose from carbon dioxide and water in the presence of sunlight.
ii)
Importance of photosynthesis to animals
1. Food/carbohydrates/starch/glucose produced provides energy for animals
2. Oxygen released is used for respiration
3. Accumulation of carbon dioxide is prevented since they are used by plants during photosynthesis
b)
Sources of chemical energy
1. Chemical reactions/Oxidation/Combustion
2. Food/carbohydrates/starch/glucose
3. Petroleum/Kerosene/Petrol/Diesel oil
4. Fossil fuels/firewood
5. Dry cell/generator/batteries/accumulator
6. Natural Gas
c)
Separation of a mixture of sodium chloride and sand
1. Add water to the mixture
2. Stir the mixture until the sodium chloride dissolves
3. Filter off the sand and evaporate the filtrate to obtain the sodium chloride
d)
CaCO3 + HCl → CaCl3 + H2O + CO2
e)

a)
The funnels in the diagram below contain equal amounts of different types of soil labelled K, L and M. Equal volumes of water were poured onto each soil at the same time and allow to drain for 20 minutes.
Study the diagram carefully and answer the questions that follow.

i)
What is the aim of the experiment?
ii)
Which soil has the highest rate of drainage?
iii)
Which soil has the highest water retention capacity?
iv)
Which soil is mostly likely to lose water and dry faster after rainfall?
v)
Which soil is mostly likely to be waterlogged after rainfall?
vi)
Which of the soil types would be suitable for maize cultivation?
b)
The diagram below illustrates hazard symbols labelled I, II, III and IV.
Study the diagram carefully and answer the questions that follow.

i)
What does each of the symbols labelled I, II, III and IV represent?
ii)
Name one substance each that is associated with:
α)
I;
β)
II;
γ)
III.
iii)
Name the place where the symbol labelled IV is often displayed.
iv)
Which of the symbol(s) is/are found on chemical containers?
c)
The diagram below illustrations of devices used to do work easily.
Study the diagram carefully and answer the questions that follow.

i)
Give a general name for the devices.
ii)
Identify each of the devices labelled A, B, C and D.
iii)
Name the parts labelled I, II and III of device A when it is considered as a lever.
iv)
What does the arrow represent in the device labelled B?
v)
Name the type of work done with each of the device labelled:
α)
C;
β)
D.
d)
The diagram below illustrates the digestive system in humans.
Study the diagram carefully and answer the questions that follow.

i)
Name each of the parts labelled I, II, III, IV and V.
ii)
Name the part(s) of the digestive system where:
α)
digestion of food substances occur;
β)
digested food is absorbed into the bloodstream.
iii)
Name the end-products of the digestion that is absorbed into the bloodstream.
a)
i)
To compare the rate of water drainage in different types of soil/compare the water holding capacity of types of soils.
ii)
Soil K/Sandy soil
iii)
Soil M/Clayey soil
iv)
Soil K/Sandy soil
v)
Soil M/Clayey soil
vi)
Soil L/Loamy soil
b)
i)
I → toxic/poisonous
II → corrosive
III → flammable/inflammable
IV → no smoking/no naked flame
ii)
α)
Toxic/poisonous substances (I)
1. Carbon monoxide
2. Hydrogen sulphide
3. Chlorine
4. Sodium
5. Potassium
6. Cyanide compounds
7. Mercury compounds
8. Iodine
9. Carbon tetrachloride
10. Crude oil
11. Bromine
12. Lead compounds
13. Copper sulphate
14. Ammonia
15. Carbon tetrachloride(CCl4)
β)
Corrosive substances (II)
1. Concentrated hydrochloric acid
2. Sodium hydroxide
3. Potassium hydroxide
4. Nitric acid
5. Ammonium hydroxide/Ammonia
γ)
Flammable substances (III)
1. Gasoline/Petrol
2. Ethanol
3. Acetone
4. Liquid nail polish
5. L.P.G.
iii)
Places where no smoking (IV) is displayed
1. Petrol station/filling station
2. Gas station
3. Petrol tankers
4. Gas tankers
5. Public places/Any named public place e.g hospital,hotels etc.
6. Fuel storage areas
iv)
I, II and III
c)
i)
Simple machine
ii)
A → Wheelbarrow
B → Inclined plane
C → Pulley
D → Gear
iii)
I → Effort
II → Load
III → Pivot/Fulcrum
iv)
Effort
v)
α)
Use of pully
Lifting/raising loads up/lowering loads
β)
Use of gear
Change speed/direction/movement
d)
i)
I → Stomach
II → Small intestine/ileum
III → Large intestine/colon
IV → Rectum
V → Oesophagus/gullet
ii)
α)
Stomach/mouth/duodenum/ileum/small intestine
β)
Small intestine/ileum
iii)
End-products of digestion
1. Amino acid
2. Glucose
3. Fatty acids/glycerol
(a)
Explain each of the following observations in nature:
(i)
In the depths of the ocean where it is always dark, there are no green plants.
(ii)
On an island where there are no insects and birds, the pawpaw plant produces only flowers but no fruits
(b)
Describe how soil is formed.
(c)
(i)
State the laws of reflection
(ii)
Draw a labelled diagram to show the reflection of light on a plane mirror
(a)
(i)
In the depths of the ocean where it is always dark, there are no green plants
Light does not get to those depths and therefore photosynthesis cannot occur there.
(ii)
On an island where there are no insects and birds, the pawpaw plant produces only flowers but no fruits
Insects and birds transfer pollen grains for pollination of pawpaw flowers and in their absence fertilization does not occur and there is no fruit formation.
OR
Insects and birds are agents of pollination/transfer pollen grains. In their absence no fertilization and no fruit formation occur.
(b)
How soil is formed
Soil is formed when rocks weather/breakdown to form soil particles. Dead remains of organisms are acted upon by micro-organisms and all mix together.
(c)
(i)
Laws of reflection
1. The incident ray, the reflected ray and the normal at the point of incidence all lie in the same plane
2. The angle of incidence is equal to the angle of reflection
(ii)
A labelled diagram to show the reflection of light on a plane mirror
