Bece Past Questions & Answers -2016 ( Science)

11. A stick which is partially immersed in water appeared to be bent due to
A. absorption
B. reflection
C. refraction
D. transmission

12. One difference between metals and non-metals is that metals
A. have low density
B. are not malleable
C. have luster
D. have low melting points.

13. The cultivation of different crops on different plots of a farmland in a definite cycle is called
A. land rotation
B. shifting cultivation
C. crop rotation
D. mixed cropping

14. Iodine deficiency in humans could result in a disorder known as
A. diabetes
B. goiter
C. kwashiorkor
D. scurvy

15. A substance is termed combustible if it
A. easily catches fire
B. dissolves common salt
C. sublimes at room temperature
D. boils at 100°C.

16. Micro-organisms that cause diseases are collectively called
A. bacteria
B. infections
C. pathogens
D. viruses

17. Which type of energy is lost when sweat evaporates from the human body?
A. Sound energy
B. Mechanical energy
C. Chemical energy
D. Heat energy

18. Which of the following gases is involved in the rusting of iron?
A. Hydrogen
B. Oxygen
C. Nitrogen
D. Carbon dioxide

19. The feeling of soil between fingers is used to determine the
A. texture of the soil
B. drainage of the soil
C. capillarity of the soil
D. water holding capacity of the soil.

20. Sodium hydroxide is an example of a base because it
A. has sour taste
B. has a pH less than 7
C. turns wet blue litmus paper red
D. turns wet red litmus paper blue