1 (a)
(i) What is Rhesus factor?
(ii) Explain why it is not advisable for a rhesus negative woman to marry a rhesus positive man.
1 (b)
(i) What is a solvent?
(ii) Explain why water serves as a solvent for most substances.
1 (c)
(i) State two factors which affect pressure at a point in a liquid.
(ii) Calculate the pressure at a point 2.0 m below the surface of a lake. (Density of water = 1000 kg m3, g=10 m s−2)
1 (d)
Name two breeds of
(i) Dairy cattle
(ii) Beef cattle
1 (e)
(i) What is a computer peripheral?
(ii) Give two examples of a computer peripheral.
2 (a)
(i) Distinguish between a hydrocarbon and an organic compound.
(ii) Identify each of the following compounds by the IUPAC names
(α) CH3COCH3
(β) CH3CHO
(γ) HCOOH
2 (b)
(i) Define power
(ii) Calculate the power output of a machine that lifts a 50.0 kg crate through a height of 20.0m in one minute.
2 (c)
(i) List three ways in which plants and animals are interdependent
(ii) What is a food web?
(iii) Draw a simple food web of an ecosystem
2 (d)
(i) What is oestrus in a farm animal?
(ii) List the signs of oestrus in farm animals.
3 (a)
(i) What is meant by neutral point field in a magnetic field?
(ii) Draw the magnetic lines if force around two magnets placed side by side as illustrated below; indicating the neutral points.
3 (b)
(i) What is colostrum?
(ii) State three benefits a young animal derives from feeding on colostrum.
3 (c)
(i) Distinguish between corrosion and rusting
(ii) Write a balanced equation to represent the rusting of iron
(iii) Describe how clotting of blood occurs
3 (d)
State four advantages of the use of computers.
4 (a)
(i) What is meant by contraception?
(ii) Give three methods of birth control.
4 (b)
Explain the importance of each of the following management practices in agriculture:
(i) Applying fertilizers to a fish-pond
(ii) Pricking out in a vegetable nursery
(iii) Top dressing in maize production
4 (c)
(i) What is meant by occupational hazard?
(ii) Explain the effects of occupational hazards
(iii) State two ways of preventing occupational hazards
4 (d)
(i) Draw and label a diagram of a hydraulic press
(ii) Explain briefly how the hydraulic press works.
5 (a)
(i) What is grafting?
(ii) State three factors to be considered when planting ornamental plants.
5 (b)
(i) Draw and label a diagram of a vacuum flask.
(ii) Describe briefly how heat gain and heat loss are minimized due to the construction of a vacuum flask.
5 (c)
(i) With the aid of a labelled diagram, describe the laboratory preparation of dry ammonia.
5 (d)
(i) What is an essential nutrient?
(ii) For each of the following deficiency diseases, state one nutrient that is lacking:
(α) Scurvy
(β) Beriberi
(γ) Rickets
5 (e)
(i) What is software as applied to the computer?
(ii) Name one group of software.
OK thanks