Question 1

Steel is an alloy of iron and

A. aluminium.
B. carbon.
C. silicon.
D. gold.

Question 2

An atom that has lost one or more electron(s) is called

A. a molecule.
B. a proton.
C. an ion.
D. a negative particle.

Question 3

In all machines, the efficiency is

A. always 100%
B. less than 100%
C. more than 100%
D. always 0%

Question 4

In electronic circuits, LEDs are used to indicate the absence or presence of

A. voltage source.
B. p-n junction.
C. electric current.
D. emitted and collector.

Question 5

Which of the following statements about the scientific method is/are correct? It provides

A. I only
B. I and II only
C. I and III only
D. II and III only

Question 6

Which of the following substances is a compound?

A. Hydrogen
B. Nitrogen
C. Oxygen
D. Water

Question 7

Which of the following source(s) of energy is/are renewable?

A. I only
B. I and II only
C. I and III ONLY
D. I, II and III

Question 8

The pressure in fluids

A. increase with depth.
B. decrease with depth.
C. acts upwards at any point.
D. acts differently in all directions.

Question 9

Which of the following chemical equations is balanced?

A. N2+H2→NH3
B. N2+3H2→NH3
C. N2+H2→2NH3
D. N2+3H2→2NH3

Question 10

Lime juice taste sour because it is

A. acidic.
B. alkaline.
C. basic.
D. salty.

Question 11

A metal block has a mass of 1.0kg. What is the volume of the block if its density is

A. 0.01m3
B. 0.10m3
C. 1.00m3
D. 10.00m3

Question 12

It is easier to move a heavy load with a crowbar when the

A. effort distance is shorter than the load distance.
B. effort distance is longer than the load distance.
C. effort distance is equal to the load distance.
D. effort is equal to the load.

Question 13

Benedict's solution was added to a mixture in a test tube and it turned brick red when heated. The mixture is likely to contain

A. glucose.
B. vitamin.
C. protein.
D. oil.

Question 14

Chlorine gas is an example of

A. an atom.
B. an element.
C. a compound.
D. a molecule.

Question 15

Which of the following statements about a force are correct? It

A. I and II only
B. I and III only
C. I, III and IV only
D. I, II, III and IV

Question 16

Kerosine is able to reach the other end of a wick by

A. diffusion.
B. suction pressure.
C. capillary action.
D. osmosis.

Question 17

Which of the following chemical compounds is used in removing hardness in water?

A. NaCl
B. NaOH
C. Na2CO3
D. NaHCO3

Question 18

Which of the following processes is used to separate insoluble solids from liquids?

A. Sublimation
B. Filtration
C. Evaporation
D. Crystallization

Question 19

When a thermometer is put in hot water, the mercury level rises because the mercury increases in

A. density.
B. mass.
C. volume.
D. weight.

Question 20

The work done when a force moves a body through a distance of 12m is 720J. The force applied is

A. 8640N.
B. 732N.
C. 708N.
D. 60N.

Question 21

Which of the following compounds is neutral to litmus paper?

A. HCL
B. H2O
C. NaOH
D. KOH

Question 22

A balanced diet is one which is made up of

A. right proportions of protein, carbohydrates and oils.
B. equal amounts of protein, carbohydrates and oil.
C. enough water and iodated salt.
D. vegetables, fruits and water.

Question 23

The ovules in a flower develop to form the

A. fruit.
B. leaf.
C. seed.
D. stem.

Question 24

Water drains faster through sand than clay because

A. sand particles are rougher.
B. sand contains more air space.
C. clay particles are smoother.
D. clay particles are bigger.

Question 25

The best method for checking erosion on a slope is

A. cover cropping.
B. mixed cropping.
C. contour ploughing.
D. mulching.

Question 26

The housefly is an agent for the spread of

A. cholera.
B. malaria.
C. measles.
D. tuberculosis.

Question 27

Which of the following substances are carried by the blood?

A. II and III only
B. I, II and IV only
C. I and III only
D. I, III and IV only

Question 28

Which of the following statements about a plant cell is correct? It

A. does not have a nucleus.
B. contains large vacuoles.
C. is surrounded by the cell membrane only.
D. does not have a definite shape.

Question 29

The study of the soil profile of an area helps the farmer to

A. control weed growth.
B. determine the soil temperature.
C. determine the types of crops to grow.
D. know the pesticides to use.

Question 30

The term leaching in soils refers to

A. accumulation of organic matter.
B. decomposition of plant materials.
C. fixation of nitrogen.
D. removal of soil nutrients by water.

Question 31

How many stages does the mosquito go through in its life cycle of development?

A. 1
B. 2
C. 3
D. 4

Question 32

Which of the following enzymes helps in digestion of protein in the human stomach?

A. I only
B. II only
C. I and II only
D. II and III only

Question 33

Kidneys absorb water from the blood stream of humans through the processes of

A. diffusion.
B. egestion.
C. osmosis.
D. assimilation.

Question 34

An example of soil micro-nutrients is

A. copper.
B. calcium.
C. phosphorus.
D. potassium.

Question 35

The vegetable crop that requires staking during its growth is

A. sweet pepper.
B. garden eggs.
C. tomatoes.
D. hot pepper.

Question 36

The function of the white blood cells in humans is to

A. produce haemoglobin.
B. produce digestive enzymes.
C. ensure blood clot during an injury.
D. produce antibodies to fight disease causing organisms.

Question 37

The carpel of a flower is made up of the following parts except

A. filament.
B. ovary.
C. style.
D. stigma.

Question 38

A food web shows how

A. food produced by plants is distributed to other parts of the plant.
B. an organism protects itself in its environment.
C. organisms depend on one for shelter.
D. food produced by green plants is distributed among organisms in a community.

Question 39

Balanced ration enables animals to

A. increase fertility rate.
B. maintain normal growth.
C. increase meat production.
D. maintain energy level of work animals.

Question 40

Cultural practices are activities undertaken on a farm

A. after harvesting and before processing.
B. before maturity and after harvesting.
C. after planting and before harvesting.
D. before transplanting seedling.