1.
The skin is made up of
One layer
Two layers
Three layers
Four layers
Answer: B
2.
A substance of mass 10 kg has a density of 2.0 kgm-3. Calculate its volume.
0.2 m3
5.0 m3
10.0 m3
20.0 m3
Answer: B
Density =
Density x Volume = Mass
Dividing both sides by Density
Volume =
Volume =
Volume = 5 m3
3.
The force which is able to hold light objects on the surface of liquids is called
surface tension
friction
capillarity
viscosity
Answer: A
4.
In which of the following electrical appliances is electrical energy mainly converted to heat energy?
Cooker
Fan
Refrigerator
Tape recorder
Answer: A
5.
A beneficial effect of wind on the environment is
promotion of photosynthesis in green plants.
pollination in flowering plants.
leaching in soils.
erosion in soils.
Answer: B
6.
Which of the following parts of the human body are sense organs?
I. Tongue
II. Hair
III. Nose
IV. Skin
I and IV only
II and III only
I, II and III only
I, III and IV only
I, II, III and IV
Answer: D
7.
Which of the following energy sources is/are environmentally friendly?
I. Wind
II. Hydro
III. Biomass
I only
II only
I and II only
I, II and III
Answer: D
8.
An example of a lever in which the effort is applied at the middle is a
wheelbarrow.
pair of forceps.
pair of scissors.
beam balance.
Answer: B
Forceps

9.
Which of the following insect(s) show(s) the egg, nymph and adult stages in its life cycle?
I. Grasshopper
II. Housefly
III. Mosquito
I only
I and II only
II and III only
I, II and III
Answer: A
Grasshopper life cycle
Grasshoppers are hemimetabolous insects. Hence, their life cycle consists of three stages – the egg, the nymph, and the adult.
Housefly life cycle
The life cycle of housefly comprises four stages namely, egg, larva, pupa and adult.
Mosquito life cycle
Life cycle of mosquito consists of four stages namely, egg, larval, pupal, and adult.
10.
Photosynthesis occurs only in green plants because they
absorb water
are found in the tropics
are very active
contain chlorophyll
Answer: D
11.
Feel Method is used to determine soil
air.
colour.
structure.
texture.
Answer: D
12.
The figure below shows a simple electric circuit.
Use it to answer the question below.

The switch is represented by
IV
III
II
I
Answer: C
COMPONENTS OF CIRCUIT

13.
The angle between a ray of light and the surface it strikes is 30°. Calculate the angle of incidence.
210°
120°
90°
60°
Answer: D
14.
When gases are heated they
melt.
sublime.
decrease in volume.
decrease in intermolecular forces
Answer: D
When a particle is heated
The intermolecular forces are the attractions between the molecules when temperature increases it develops more distance between molecules and because of this attraction decreases, resulting intermolecular force decreases.
Intermolecular forces decreases on heating as the particles gain energy and start vibrating.
The intermolecular space between particles increases and they overcome the intermolecular forces.
Hence, the intermolecular forces decrease on heating because kinetic energy increases and space between particles increases.
15.
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
16.
An example of a noble gas is
chlorine
neon.
nitrogen.
oxygen.
Answer: B
The noble gases, also known as the inert gases and aerogens, are the elements that belong to group 18 of the modern periodic table. The elements that belong to this group are:
1. Helium (He)
2. Neon (Ne)
3. Argon (Ar)
4. Krypton (Kr)
5. Xenon (Xe)
6. Radon (Rn)
They are known to possess extremely low chemical reactivity (hence the name inert gas). This is because all the noble gases have stable electronic configurations. This is the reason why noble gases do not form molecules easily and are mostly found as mono-atomic gases.
17.
Answer: B
18.
Soil acidity can be reduced by adding
acid solution
ammonium sulphate
fertilizer
lime
Answer: D
19.
A positively charged ion is called
anion.
cation.
neutron.
proton.
Answer: B
20.
Which of the following processes can occur at all temperatures?
Boiling
Evaporation
Melting
Sublimation
Answer: B
21.
The charge of sulphur in the compound SO2 is
-2
+2
-4
+4
Answer: D
Ideally sulphur shares 4 of it's electron with oxygen in a covalent bond so there won't be any charge in this case. But in the sense that sulphur donates 4 of it's electron to oxygen so that each of the two oxygens' configuration can be stable (2,8), then it can be said to be +4.
Note: The atomic number of Oxygen is 8, hence its electronic configuration for a neutral Oxygen will be 2,6 (missing 2 electrons to be stable, thus to complete the 8 electrons which is suppose to be the total number of electrons in the second, third, fourth etc. shells).
22.
Kerosene and petrol are obtained from crude oil by
distillation
condensation
filtration
evaporation
Answer: A
23.
A stick placed in water appears to be bent because light travelling from the water to the air is
dispersed.
displaced.
refracted.
reflected.
Answer: C
Refraction is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another. This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows. Even our eyes depend upon this bending of light.
24.
The importance of fuse in an electrical circuit is to
regulate the voltage.
prevent damage to electrical appliances.
alter the flow of current in the circuit.
minimize the use of current.
Answer: B
25.
The attracting power of magnets is greatest at the
centre.
edges.
poles.
sides.
surface.
Answer: C
26.
Which of the following encourages the spread of venereal diseases?
Poor family planning
Drug Abuse
Mental ill health
Parental wealth
Answer: E
27.
The lion is a typical example of
a pet
a carnivore
an omnivore
a herbivore
Answer: B
28.
The female part of a flower is called the
filament.
petal.
pollen grain.
sepal.
Style.
Answer: E
29.
The lion is a carnivore because it eats
flesh.
grass.
fruits.
uncooked food.
Answer: A
Types of feeding by animals
Carnivore: the eating of animals/flesh.
Herbivore: the eating of plants.
Omnivore: the eating of both plants, animals, fungi, bacteria etc.
30.
Which of the following sources of energy is non-renewable?
I. Coal
II. Solar
III. Wind
IV. Uranium-236
I, II and III only
II, III and IV only
I and IV only
II and III only
Answer: C
A renewable source can replenish itself at the rate it is used, while a non-renewable source has a limited supply.
Renewable sources include timber, wind, and solar while non-renewable sources include coal and natural gas.
31.
Which of the following food substances is not oxidized during respiration?
Fatty acids
Amino acids
Glucose
Cellulose
Answer: E
32.
A mixture of raw starch and water is best separated by
boiling
distillation
decantation
winnowing
crystallization
Answer: C
33.
The sun and the planets form the
atmosphere.
constellation.
milky way.
solar system.
universe.
Answer: D
34.
Which of the following statements about machines is/are true?
I. The commonest and simplest of all machines is the lever
II. The efficiency of a machine is the ratio of work output to work input
III. The efficiency of a machine is usually less than one
IV. Machines make working much easier and convenient
I only
I and II only
I and III only
I, II and III only
I, II, III and IV
Answer: E
35.
Which of the following illustrations shows the correct direction of the lines of force around a bar magnet?




Answer: B
The direction of magnetic lines of force of a bar magnet is from north to south pole outside the magnet as shown in figure below.

36.
Brass is an alloy of
iron and carbon
zinc and copper
iron and copper
copper and tin
Answer: B
37.
Which of the following items converts chemical energy to electrical energy?
Dry cell
Electric bulb
Loudspeaker
Microphone
Answer: A
38.
The substance that sublimes when heated is
baking powder.
camphor.
common salt.
sugar.
Sulphur.
Answer: B
39.
Which of the following natural cycles directly involves the sun?
I. Carbon cycle
II. Water cycle
III. Nitrogen cycle
I, II and III
I and II only
II and III only
I only
Answer: B
40.
The number of oxygen atoms present in three molecules of carbon dioxide is
3.
4.
5.
6.
Answer: D
a)
i)
What is an embryo?
ii)
Where does an embryo develop in the female mammal?
iii)
Describe briefly how a developing embryo breathes in oxygen.
b)
Name three plant nutrients.
c)
i)
What is an electrical insulator?
ii)
Explain how a comb rubbed vigorously on dry hair attracts small pieces of paper.
d)
i)
List the chemical substances that are used in the preparation of ammonia gas in the laboratory.
ii)
Write down balanced chemical equation for the reaction.
a)
i)
Embryo is the first stage of the development of a zygote (eight weeks after conception in mammals).
ii)
In the womb or uterus of the female mammal
iii)
How a developing embryo breathes in oxygen
Oxygen from the mother's blood diffuses through the placenta into the embryo.
b)
Plant nutrients
1. Nitrogen
2. Calcium
3. Zinc
4. Iron
5. Magnesium
6. Phosphorus
7. Potassium
8. Sulphur
c)
i)
An electrical insulator is a substance/material which does not conduct electrcity
OR
An electrical insulator is a substance/material which does not allow electricity to pass through it
ii)
How a comb rubbed vigorously on dry hair attracts small pieces of paper
1. Comb rubbed in hair causes the comb to be charged
2. When the comb is brought near pieces of paper it induces an oppsite charge on the pieces of paper
3. The pieces of paper are attracted to the comb because of the opposite charges
d)
i)
Chemical substances that are used in the preparation of ammonia gas
1. Ammonium chloride
2. Calcium hydoxide/Calcium oxide
ii)
2NH4Cl + Ca(OH)2 → CaCl2 + 2H2O + 2NH3(g)
OR
2NH4Cl + CaO → CaCl2 + H2O + 2NH3(g)
a)
i)
State two differences between an ecosystem and a habitat.
ii)
What is meant by the term blood?
b)
Explain why it is difficult to separate iron and sulphur mixture after strong heating.
c)
Draw and label a diagram of a ray of light which makes an angle of 350 with the surface of a plane mirror.
d)
State two
i)
advantages of a land rotation.
ii)
disadvantages of land rotation.
a)
i)
| Ecosystem | Habitat |
| Larger | Smaller |
| Larger number of species | Smaller number of species |
| Involves different species | Involves a specific species |
ii)
Blood is a body fluid that transports oxygen and nutrients to the cells and carries away carbon dioxide and other waste products.
b)
Reasons why iron and suphur cannot be separated when heated
After heating, a chemical change occurs and the two substances are chemically combined (compound formed) and no longer a mixture
c)

Angle of incidence = Angle of reflection
Angle of incidence + 35o = 90o
Angle of incidence = 90o - 35o
Angle of incidence = 55o
Since angle of incidence = Angle of reflection
Angle of reflection = 55o

d)
i)
Advantages of land rotation
1. It helps check the spread of diseases
2. Land regains lost nutrients after the fallow period
3. Checks spread of pests
ii)
Disadvantages of land rotation
1. Does not encourage large scale farming
2. Virgin forest is destroyed
3. Needs a lot of time and work/ not easy to practice
4. Land is not fully utilized
5. Not suitable for areas where land is scarce
6. Encourages soil erosion
(a)
(i)
What is neutralization reaction?
(ii)
Write a balanced chemical equation for the reaction between each of the following pairs of substances:
(α)
Sodium metal and dilute hydrochloric acid
(β)
Sodium hydroxide and dilute hydrochloric acid
(b)
Explain weaning as used in animal production.
(c)
(i)
What is a Milky Way?
(ii)
State one use of artificial satellites.
(d)
(i)
What is a habitat?
(ii)
Give two examples of a habitat.
(a)
(i)
Neutralization reaction is a chemical reaction between an acid and a base to form salt and water only.
(ii)
(α)
Reaction between sodium metal and dilute hydrochloric acid
2Na(s) + 2HCl(aq) → 2NaCl(s) + H2(g)
(β)
Reaction between sodium hydroxide and dilute hydrochloric acid
NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)
(b)
Weaning is the changing of the offspring's diet from breast milk to other kinds of food.
(c)
(i)
Milky Way is the galaxy in which the solar system is located.
OR
Milky Way is the group of planets and stars which the earth belongs to.
(ii)
Uses of artificial satellites
1. For space exploration
2. For communication/broadcasting/telephone call
3. For weather forecasting/collecting information on the weather
4. For scientific research/experimental research/internet
5. For military purposes/spying/espionage
6. To study the universe
7. For map making
8. For navigation/satellite for navigation
(d)
(i)
Habitat is a natural living place of an organism.
OR
Habitat is a place where an organism spends parts/all of its life.
(ii)
Examples of a habitat
1. Aquatic e.g Ponds, streams, lakes, rivers, marine (sea)
2. Terrestrial e.g Forest, Savannah, thicket
3. Arboreal e.g Tree branches, leaves
(a)
(i)
State two conditions that are required for photosynthesis to take place.
(ii)
How would you show that starch is formed during photosynthesis?
(b)
Write a balanced chemical equation to show the reaction between hydrogen and oxygen.
(c)
(i)
What is a satellite?
(ii)
Give one example of a natural satellite.
(iii)
List two uses of artificial satellites.
(a)
(i)
Conditions that are required for photosynthesis to take place
1. Presence of sunlight/light
2. Presence of carbon dioxide
3. Presence of chlorophyll
4. Suitable temperature/warmth
5. Water/mineral salts
(ii)
How to show that starch is formed during photosynthesis
1. Two leaves are plucked, one from a plant exposed to sunlight for at least two hours and the other from plant kept in the dark for the same period
2. Both leaves are boiled in water to kill the cells
3. Both leaves are boiled in alcohol to remove pigmentation/chlorophyll
4. Both decolourized leaves are washed in warm water to soften them
5. Dip both leaves in iodine solution
6. The leaf plucked from plant in the sunlight turns blue black with iodine showing the formation of starch during photosynthesis
7. The leaf plucked from plant kept in the dark remains colourless showing there was no formation of starch because photosynthesis did not take place
(b)
A balanced chemical equation showing the reaction between hydrogen and oxygen
2H2 + O2 → 2H2O
(c)
(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)
Examples of natural satellites
1. Moon
2. Earth
Note: any named planet is also an example of a natural satellite
(iii)
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
(a)
(i)
What is soil erosion? Give two types of soil erosion
(ii)
Give three activities of man that can cause soil erosion.
(iii)
List three ways by which soil can be conserved.
(b)
(i)
What is a lever?
(ii)
Classify the following under first class, second class and third class levers.
Sugar tong
Bottle opener
Paper cutter
A pair of scissors
Fishing rod
Claw hammer
(c)
In each of the following activities, state whether the changes that occurred are:
(i)
physical or chemical
(ii)
reversible or irreversible
I.
Some boiled cassava and plantain were pounded together into fufu.
II.
A piece of ice block is put in a cup. After a while, it is found out that the block had changed into a liquid
III.
A clean piece of nail was put into a beaker of water. After five days it was observed that the colour of the nail had changed.
(a)
(i)
Soil erosion is the removal/washing away of soil particles/topsoil by running water or rain or wind.
Types of soil erosion
1. Gully
2. Rill
3. Sheet
4. Splash
(ii)
Activities of man that can cause soil erosion
1. Road construction
2. Bush fires
3. Deforestation
4. Farming/over-cropping
5. Sand wining/soil removal for building and road construction
6. Over-grazing by farm animals
(iii)
Ways by which soil can be conserved
1. Cover cropping
2. Crop rotation
3. Green manuring
4. Fertilizer application
5. Liming
6. Composting
7. Mixed farming
8. Mixed cropping
9. Alley cropping
10. Mulching
11. Bush fallowing
12. Application of farm yard manure/kraal manure/poultry manure
13. Use of leguminous crops to fix nitrogen
14. Tillage to improve aeration
15. Irrigation
16. Afforestation and reafforestation
17. Land rotation
18. Contour ploughing
19. Erecting windbreaks
(b)
(i)
A lever is a simple machine which consists of a rigid bar/rod free to turn about a fixed turning point called the fulcrum/pivot.
(ii)
Classes of levers
| First class lever | Second class lever | Third class lever |
|
A pair of scissors
|
Bottle opener
|
Sugar tong
|
(c)
| # | Activity | Change | Reversible or irreversible |
| I. | Some boiled cassava and plantain were pounded together into fufu. | Physical change | Irreversible |
| II. | A piece of ice block is put in a cup. After a while, it is found out that the block had changed into a liquid | Physical change | Reversible |
| III. | A clean piece of nail was put into a beaker of water. After five days it was observed that the colour of the nail had changed. | Chemical change | Irreversible |
(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