BECE 1999 Integrated Science Paper 2
BECE PAST QUESTIONS AND ANSWERS
BECE 1999 INTEGRATED SCIENCE
Essay - Paper2
Answer three questions only from this section.
Illustrate
your answers wherever possible, with large, clear and fully labelled
diagrams. Credit will be given for clarity of expression and orderly
presentation of material.
All questions carry equal marks
1. (a) State one function of each of the following organs in humans
(i) skin
(ii) lung
(iii) kidney
(iv) testis
(ii) Name two plants which reproduce vegetatively
(c) Name four main factors which determine the climate of a place
(d) Define the following:
(i) work
(ii) power
(e) Name the separation method used in the production of each of the following substances(i) akpeteshie (alcohol)
(ii) common salt
(iii) tap water
2. (a) How would you demonstrate that expired air contains carbon dioxide?
(b) (i) What is an ion
(ii) Give two examples of ions
(c) (i) What is capillary action
(ii) State two processes which use capillary action
(d) (i) What is a lever?
(ii) Give two examples of second class levers
(e) (i) Use any three of the following organisms to construct a food chain.
Rat, hawk, okro leaves, toad, cassava, man, grasshopper
(ii) List three ways of keeping the teeth healthy
3. (a) (i) Describe briefly what happens to a morsel of kenkey in the mouth during eating.
(ii) List in order, the parts of the digestive system of humans
(b) A mixture of iron filings and sulphur is heated in a test tube
(i) Give the name of the compound formed
(ii) Write the chemical equation of the reaction which took place
(iii) State two methods of preventing iron from rusting
(c) (i) A boy pulled a load through a distance of 5 m. If he exerts a force of 15 N in the direction of the force, calculate the work done
(ii) Convert the following weights expressed in kilogram force (kgf) to newton (N)
(α) 0.75 kgf
(β) 1.33 kgf
[1kgf = 10N]
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4. |
(a) |
(i) |
State two reasons which indicate that respiration and burning are similar processes |
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(ii) |
What is cross-pollination? |
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(iii) |
List four methods by which cholera can be controlled and prevented |
(b) (i) Name the three coldest planets
(ii) State one reason which accounts for the coldness of the planets you have stated.
(iii) An object of mass 150 g occupies a volume of 250 cm3. Calculate its density.
(c) Name a suitable solvent for each of the following substances
(i) grease
(ii) oil paint
(iii) alcohol
(iv) sugar
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