1.
Natural fats are composed of
carbon, hydrogen and oxygen.
carbon, hydrogen and nitrogen.
carbon, oxygen and nitrogen.
hydrogen, oxygen and nitrogen,
2.
Ash from burnt plant material can be used to prepare local soap because it contains
potassium chloride.
potassium hydroxide.
hydrogen sulphide.
ammonia.
3.
Excessive amount of nitrogen in the soil leads to
proper growth of plants.
increased photosynthesis in plants.
delayed maturity of crops.
well-developed stems of crops.
4.
The SI unit of electric charge is
ampere.
coulomb.
ohm.
volt.
5.
Which of the following gases is a greenhouse gas?
Nitrous oxide
Ozone
Sulphur dioxide
Carbon dioxide
6.
The instrument most suitable for the measurement of the thickness of a sheet of paper is
Vernier callipers.
micrometer screw gauge.
metre rule.
engineers callipers.
7.
Which of the following indicators can measure pH values?
Litmus
Methyl orange
Phenolphthalein
Universal indicator
8.
The main function of the rumen is to
act as a chamber of digestion.
absorb excess water.
produce digestive juices.
serve as storage chamber.
9.
The fibrous mesocarp of coconut aids its dispersal by
explosion.
insects.
water.
wildlife.
10.
Which of the following radiations are particles?
I. Alpha
II. Beta
III. Gamma
I and II only
I and III only
II and III only
I, II and III
11.
A substance that contains 10 electrons and 11 protons is
a halogen.
a noble gas.
an ion.
an atom.
12.
Which of the following practices reduces the speed of run-off along sloped lands?
Mulching
Strip cropping
Mixed cropping
Manuring
13.
Methods of reducing friction in machines include
I. use of ball bearings
II. use of lubricants
III. use of cooling agents
Which of the following statements above are correct?
I and II only
I and III only
II and III only
I, II and III
14.
Leguminous fodder crops are included in pastures to ensure that animals are supplied with
minerals.
vitamins.
lipids.
proteins.
15.
Which of the following pollutants affect weather conditions?
I. Sulphur dioxide
II. Ozone
III. CFC
I and II only
I and III only
II and III only
I, II and III
16.
Fresh tomato seeds only germinate after they dry up. This may be due to
unstable pH.
absence of hormones.
hard testa.
the presence of inhibitors.
17.
The work done by a machine in moving a body is 450 J. If the force applied is 30.0 N, calculate the distance through which the body moved.
1.5 m
1.5 x 10 m
6.7 x 10-2 m
1.35 x 104 m
18.
In the reflex arc, the
sensory nerve sends stimulus to the spinal cord.
motor neurone receives the stimulus.
intermediate neurone transmits impulse from the sensory neurone to the motor neurone.
sensory neurone receives impulse from the motor neurone via the intermediate neurone.
19.
How many moles of oxygen are present in 4.0 g of the gas?
0.25
0.50
0.75
1.00
20.
An athlete runs an 800 m race in 4 minutes and 40 seconds. Calculate the average speed of the athlete.
2.86 m-1
3.33 m-1
4.25 m-1
6.28 m-1
21.
The volume occupied by 0.02 moles of a gas at standard temperature and pressure is
0.224 dm3
0.240 dm3
0.448 dm3
4.480 dm3
22.
Which of the following activities best describe soil conservation?
I. Ensuring presence of water in the soil.
II. Maintaining nutrient in the soil.
III. Practicing crop rotation on the soil.
IV. Protecting the structure of the soil.
I and II only
I, II and III only
I, II and IV only
I, III and IV only
23.
Oil dipped on the surface of water bodies kills mosquito larvae through
dehydration
poisoning
starvation
suffocation
24.
An object weighs 20 N in air and when immersed in a liquid it displaces 0.5 kg of the liquid.
Calculate the upthrust on the object.
[g = 10 ms-2]
40.0 N
15.0 N
10.0 N
5.0 N
25.
Alkanoic acid + alkanol ⇋H2SO4 alkyl alkanoate + water
Use the equation above to answer the question below
The reaction is called
hydrolysis.
hydration.
dehydration.
esterification.
26.
Alkanoic acid + alkanol ⇋H2SO4 alkyl alkanoate + water
Use the equation above to answer the question below
The H2SO4 is acting as
catalyst.
enzyme.
drying agent
dehydrating agent.
27.
In which of the following applications is cooling by evaporation used?
I. Temperature regulation in humans
II. Cooling of water in an alcohol clay pot
III. Cooling by an air conditioner
I and II only
I and III only
II and III only
I, II and III
28.
The earthworm is important to the farmer because it
improves soil structure.
improves soil texture.
destroys soil pathogen.
reduces amount of air in the soil.
29.
Which of the following blood types are safe to use for a person with type B blood?
I. A
II. B
III. O
I and II only
I and III only
II and III only
I, II and III
30.
Smoke is a mixture of
liquid and gas.
gases.
solid and gas.
solid, liquid and gas.
31.
Which of the following crops is a fruit vegetable?
Cabbage
Carrot
Cucumber
Onion
32.
The elements in bronze are
copper and zinc.
copper and lead.
copper and nickel.
copper and tin.
33.
The acrosome in the sperm cell
serves as a source of nutrients for the sperm.
facilitates the penetration of the sperm into the egg cell.
provides energy required by the sperm to swim.
carries the genetic material from the father to the foetus.
34.
Which of the following pollutants cause(s) acid rain?
I. CO2
II. NO2
III. SO3
I only
II only
II and III only
I, II and III
35.
The part of the human ear that helps to balance pressure between the ear and the atmosphere is
cochlea.
Eustachian tube.
pinna.
malleus.
36.
Digestion of food is completed in the
small intestine.
large intestine.
stomach.
liver.
37.
A maize cob showing large mass of black spores on some of the grains indicates infection of
maize streak.
maize smut.
maize rust.
maize blight.
38.
Which of the following unit(s) is/are derived?
I. Ohm
II. Volt
III. Ampere
I only
I and II only
II and III only
I, II and III
39.
When anaerobic respiration and aerobic respiration are compared, the energy yield
are the same.
is less in anaerobic respiration
is less in aerobic respiration.
cannot be compared.
40.
An example of a unisexual flower is
Hibiscus.
Pride of Barbados.
flamboyant.
watermelon.
41.
Which of the following materials is non-magnetic?
Brass
Steel
Nickel
Cobalt
42.
Plastics have become important substitutes for metals n manufacturing industries because of their
I. anti-rust properties.
II. relative cheapness.
III. ability to be moulded into shapes.
Which of the statements above are correct?
I and II only
I and III only
II and III only
I, II and III
43.
Species, genus and family are examples of
binomial classification.
taxa.
phyla.
genera.
44.
The correct order in which food moves through the digestive system of a fowl is
crop → proventriculus → gizzard → duodenum.
crop → gizzard → proventriculus → duodenum.
proventriculus → gzzard → crop → duodenum.
proventriculus → crop → gizzard → duodenum.
45.
If the genotype of the parents are Aa and Aa, the offsprint most probably will be
AA and aa.
all Aa.
AA, Aa and aa.
AA and aa.
46.
Sound waves travel fastest in
gas.
liquid.
solid.
vacuum.
47.
Which of the following properties of carbon dioxide is useful in fire fighting?
I. It does not support combustion.
II. It is heavier than air.
III. It does not produce toxic compounds.
I and II only
I and III only
II and III only
I, II and III
48.
Pricking of yam is done to
prevent vegetative growth.
encourage development of clusters of tubers.
prevent hardening of tubers.
prevent disease infestation.
49.
An example of a wind instrument is
xylophone.
guitar.
flute.
cymbals.
50.
Which of the following descriptions best fit the structure of the incisor in humans?
Sharp and pointed
Sharp and chiseled
Flat and cusped
Pointed and chiseled
(a)
(i)
Define classification as used in science.
(ii)
State one contribution to science by the following scientists:
(α)
Mendeleev;
(β)
Linnaeus;
(γ)
Aristle.
(b)
(i)
Define mechanical energy.
(ii)
A body of mass 10 kg is placed at a height 200 cm above the ground.
Calculate the potential energy possessed by the body [g = 10 m s-2]
(c)
(i)
Distinguish between a base and an alkali.
(ii)
Name one natural source of each of the following bases:
(α)
ammonia;
(β)
potassium hydroxide;
(γ)
carbon oxide.
(d)
(i)
Explain the term mulching
(ii)
List three materials used for mulching.
(a)
(i)
Differentiate between a pest and a parasite.
(ii)
Name the states in the life-cycle of a weevil.
(b)
A solution was prepared by dissolving 25 g of KOH in 250 cm3 of distilled water.
(i)
Calculate the concentration of the solution in mol dm-3.
[K = 39, O = 16, H = 1]
(ii)
If 125 cm3 of the solution is diluted to 1000 cm3, calculate the concentration of the diluted solution in mol dm-3.
(c)
Name the discrete electronic component describe by each of the following statements:
(i)
it stores electric charge;
(ii)
it stores magnetic field when electric current flows through it;
(iii)
it opposes the flow of electric charge;
(iv)
it is made of two parallel plates separated by an insulator;
(v)
it allows electric current to flow in one direction only
(d)
Copy and complete the table below.
| Blood group | Antigen on surface of red blood cell | Antibody in the serum of the same individual |
| A | ||
| B | ||
| AB | ||
| O |
(a)
(i)
Explain the statement, pure water is neutral.
(ii)
State two causes of hardness of water.
(b)
(i)
What is a
α)
bisexual flower?
β)
unisexual flower?
(ii)
Give an example of a
α)
bisexual flower;
β)
unisexual flower.
(c)
(i)
Define the term weaning
(ii)
Give three reasons for weaning piglets.
(d)
(i)
Name three components of the middle ear of humans.
(ii)
State the function of two of the components named in (i).
(a)
(i)
What are organic compounds?
(ii)
Name the three main sources of organic compounds.
(b)
(i)
What is litter as used in poultry?
(ii)
Name the term brooding as used in animal production.
(c)
(i)
What is meant by non-heritable characteristic?
(ii)
Give three examples of non-heritable characteristic.
(d)
(i)
Differentiate between speed and velocity.
(ii)
A body of mass 10 kg in motion, changes its speed from 50 m s-1 to 100 m s-1 in 10 s. calculate the:
α)
acceleration of the body;
β)
force that caused the acceleration.
(a)
Explain why the:
(i)
tip of needles are made pointed;
(ii)
wheels of earth moving machines are broad.
(b)
Explain each of the following terms:
(i)
Balanced ration;
(ii)
Maintenance ration.
(c)
(i)
What are metalloids?
(ii)
Give two examples of metalloids.
(iii)
Name two alloys and state the constituents of each of them.
(d)
(i)
Describe the process of fat digestion in humans.
(ii)
Name two disorders that affect the liver.
(a)
(i)
What is meant by the term decomposers?
(ii)
State two ways in which decomposers are important in an ecosystem.
(b)
(i)
What are secondary colours of light?
(ii)
Name two secondary colours of light.
(iii)
Name two electromagnetic radiations that have frequencies higher than violet light.
(c)
(i)
List three scientific principles involved in the production of palm oil.
(ii)
State two hazards in the school laboratory.
(d)
(i)
Differentiate between sedimentary rocks and metamorphic rocks.
(ii)
List three characteristics of igneous rocks.
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