1 2015 June WASSCE Integrated Science Paper 1

1. Bacteria belong to Kingdom
A. Animalia
B. Fungi
C. Prokaryotae
D. Proctoctista

2. In a simple electric circuit the device that regulates the current flow is the
A. ammeter
B. amplifier
C. resistor
D. rheostat

3. Which of the following organisms is a producer?
A. grasshopper
B. Spirogyra
C. Rhizopus
D. Virus

4. Examples of hydrocarbons belonging to alkane series are
A. C₂H₆ and C₃H₈
B. C₂H₂ and C₃H₆
C. C₂H₈ and C₃H₈
D. C₄H₁₀ and C₂H₄

5. Green manure is beneficial to the soil if the plant material is
A. free from pests
B. grown with fertilizer
C. ploughed into the moist soil just before flowering
D. ploughed into the moist soil after harvesting

6. Lactic acid can be found in
A. grape
B. orange
C. palm oil
D. sour milk

7. Evaporation of liquid increases with
A. decrease in density of the liquid
B. increase in atmospheric pressure
C. decrease in the exposed surface area
D. decrease in temparature

8. Which of the following processes is a physical change?
A. Electrolysis of aqueous sodium chloride
B. Fermentation of palm wine
C. Separation of sand from water
D. Burning of magnesium ribbon in air

9. Soil conservation can be achieved through
A. agroforestry
B. intercropping
C. mixed cropping
D. introduction of green legumes

10. A laterally inverted image is one which is
A. real and formed in front of the mirror
B. real and formed behind the mirror
C. virtual and formed behind the mirror
D. virtual and formed in front of the mirror

11. Killing water snails with molluscides results in the control of
A. ascariasis
B. onchocerciasis
C. shistosomiasis
D. trypanosomiasis

12. The vacuum between the two wals in a vacuum flask minimizes heat transfer by
I. conduction
II. convection
III. radiation
Which of the above statements is/are correct?
A. I only
B. I and II only
C. II and III only
D. I, II and III

13. An atom of element X is made up of 17 electrons and 18 neutrons. What is the mass number of the element?
A. 17
B. 18
C. 34
D. 35

14. Biodiversity is defined as
A. study of living things
B. variation in forms of life
C. classification of living things
D. living and non-living things in habitats

15. Which of the following methods is/are used in making magnets?
I. Single touch
II. Double touch
III. Electrical
A. I only
B. I and III only
C. II and III only
D. I, II and III

16. The most effective method of reducing erosion on hilly lands is by
A. terracing
B. applying organic manure
C. creating wind breaks
D. erection of barriers

17. Which of the following features does not adapt a leaf of a flowering plant for photosynthesis?
A. Being thin in shape
B. Being flat and broad
C. Possession of starch
D. Possession of numerous stomata

18. Steel is preferred to pure iron for constructional work because
A. steel is cheaper than iron
B. steel is harder and stronger than iron
C. iron poses more health hazard than steel
D. steel is more shiny than iron

The diagram below is an illustration of an NPN transistor. Study it carefully and answer Questions 19 and 20.
19. The part labelled I is
A. base
B. collector
C. emitter
D. resistor

20. The function of the art labelled II is to supply
A. protons
B. voltages
C. negative charges
D. positive charges