BECE 1997 Integrated Science Paper 2
BECE PAST QUESTIONS AND ANSWERS
BECE 1997 INTEGRATED SCIENCE
Essay - Paper 2
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) Define the term osmosis
(b) State two examples of everyday observations which can be explained in terms of capillary action.
(c) (i) Name the three processes by which heat can be transferred.
(ii) Name three appliances which use thermostat.
(d) (i) What is a saturated solution?
(ii) State whether each of the following is a solution, suspension or a colloid:
Clay in water
Sugar in water
Ammonia in water
Powdered chalk in water
Potassium permanganate in water Soap in water
2. (a) Copy the table below and write the usual host of each of the parasites given in the spaces provided.
|
Parasite |
Host |
|
Plasmodium |
|
|
Capsids |
|
|
Tapeworm |
|
|
Dodder |
|
(b) (i) Name three classes of food
(ii) For each of the following food substances, give the major class of food to which it belongs: starch, milk, margarine, sugar
(c) Write the chemical formula for each of the following compounds:
(i) calcium hydroxide
(ii) zinc chloride [zinc (II) chloride]
(iii) sodium nitrate [sodium trioxonitrate (V)],
(iv) calcium carbonate [calcium trioxocarbonate (IV)]
(v) potassium sulphate [potassium tetraoxosulphate (VI)]
(d) (i) Define the term viscosity
(ii) Describe an experiment you performed to compare the viscosities of two liquids A and B
3. (a) (i) Define the terms humidity and wind
(ii) Name the instruments used to measure humidity and the speed of wind
(b) (i) What is a galaxy?
(ii) Give one example of galaxy
(c) State three methods by which food can be preserved.
(d) Explain why it is better to wear white clothes than black clothes on a sunny day.
(e) Write down the names of the new substances formed when the following substances are allowed to react:
(i) Sodium hydroxide and dilute sulphuric acid
(ii) Calcium carbonate and dilute hydrochloric acid
(iii) Ammonia and dilute sulphuric acid
4. (a) Define the following terms and give an example each
(i) Herbivore
(ii) Carnivore
(iii) Omnivore
(b) Two dry cells connected in parallel are in turn connected in series with a bulb and switch.
Draw a circuit diagram to illustrate this arrangement
(c) List four garden tools
(d) What property of water causes mosquito larvae to float on it?
(e) Describe an experiment you prepared to show that some part of air is used in burning.
You Might Also Like
.webp)
No comments: