1. The ultimate source of energy on the earth is
A. petroleum
B. the sun
C. the wind
D. wood
B
2. The following gases are constituents of air except
A. carbon dioxide
B. nitrogen
C. oxygen
D. sulphur (IV) oxide
D
3. Which of the following parts of a leaf is most photosynthetic?
A. leaf epidermal tissue
B. palisade mesophyll
C. pericycle tissue
D. vascular tissue
B
4. The area between the like poles of two magnets where no lines of force appear is called
A. magnetic field
B. neutral point
C. north pole
D. south pole
B
5. It is better to wear white clothing in the tropics because white materials
A. reflect radiant heat
B. absorb radiant heat
C. conduct heat away more readily
D. absorb sweat readily
A
6. Objects are weightless in space because
A. there is negligible force of gravity
B. the force of gravity exactly balances the weight of the objects
C. there is no air
D. the upthrust on the object is equal to the weight of the object
B
7. The process of removing undigested food material out of the body is termed.
A. egestion
B. excretion
C. ingestion
D. secretion
A
8. The label of a fruit juice indicates that it contains 20% juice. The volume of fruit juice in a 250 ml pack of the product is
A. 50 ml
B. 100 ml
C. 200 ml
D. 250 ml
A
9. Which of the following radiations has the highest ionizing power?
A. Alpha rays
B. Beta rays
C. Gamma rays
D. X-rays
A
10. The malaria parasite is found in the saliva of
A. female anopheles
B. female culex
C. male aedes
D. male anopheles
A
11. Duck rearing is often integrated with fish culture system in order to
A. check eutrophication
B. control predation
C. control growth of water weeds
D. improve nutrition
D
12. The amount of energy needed to push a weight of 45 N through a distances of 5 m is
A. 9 J
B. 40 J
C. 50 J
D. 225 J
D
13. Which of the following factors will quicken the rate at which microbial activity will turn milk sour?
A. concentration
B. particle size
C. moisture content
D. temperature
D
14. The ecological instrument suitable for collecting small animals living in cracks and crevices is the
A. pitfall trap
B. pooter
C. quadrat
D. sweep net
B
15. Which of the following computer programme applications is most suitable for the production of financial records?
A. database management
B. desktop publishing
C. spreadsheet
D. word processing
C
16. The essential elements to consider in town planning are
I. provision of schools
II. human waste disposal system
III. Water supply
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
D
17. Which of the following solvents may be used as an antiseptic?
A. caustic soda
B. kerosene
C. methylated spirit
D. turpentine
C
18. A body of mass 4 kg is dropped from a height of 10 m. Calculate the maximum energy of the body. (g = 10 ms−2).
A. 25 J
B. 40 J
C. 100 J
D. 400 J
D
19. The purpose of pricking out seedlings is to
A. ensure quick germination
B. protect the seedlings from direct sunlight.
C. prevent overcrowding in the nursery
D. reduce rate of transpiration
C
20. In testing a leaf for the presence of starch, the leaf is first put into boiling water to
A. harden the leaf cells
B. stop all chemical reactions in the leaf cells
C. activate the enzymes in the leaf cells
D. dissolve out the chlorophyll in the leaf cells
B
21. Which of the following devices is a second class lever?
A. a pair of scissors
B. see-saw
C. a pair of tongs
D. wheelbarrow
D
22. Chlorine is used in water treatment to
A. kill microbes
B. kill weeds
C. prevent growth of algae
D. coagulate fine particles in the water
A
23. Which of the following factors influence soil formation?
I. biological
II. chemical
III. Physical
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
D
24. Some waste products which are produced and stored within flowering plants are
A. excess water, carbon dioxide and oxygen
B. excess water, tannins and carbon dioxide
C. tannins, resins and lignin
D. resins, lignin and oxygen
C
25. A coin placed 10.0 cm below a liquid appeared to be 6.0 cm deep when observed from above. Calculate the refractive index of the liquid.
A. 0.60
B. 1.67
C. 4.00
D. 16.00
B
26. The metal that can be obtained from bauxite is
A. aluminum
B. gold
C. iron
D. manganese
A
27. The following livestock diseases are caused by viruses except
A. anthrax
B. foot and mouth diseases
C. rinderpest
D. swine fever
A
28. Which of the following functions is performed by blood platelets?
A. engulfing bacteria
B. production of antibodies
C. transportation of oxygen
D. aiding blood clothing
D
29. One characteristic that distinguishes between the same note played on a piano and an organ
A. beat
B. loudness
C. pitch
D. quality
D
30. Farm animals develop immunity to diseases through
A. disinfection
B. drenching
C. quarantine
D. vaccination
D