(i) What is Rhesus factor?
(ii) Explain why it is not advisable for a rhesus negative woman to marry a rhesus positive man.
(i) What is a solvent?
(ii) Explain why water serves as a solvent for most substances.
(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)
Name two breeds of
(i) Dairy cattle
(ii) Beef cattle
(i) What is a computer peripheral?
(ii) Give two examples of a computer peripheral.
(i) Distinguish between a hydrocarbon and an organic compound.
(ii) Identify each of the following compounds by the IUPAC names
(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.
(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
(i) What is oestrus in a farm animal?
(ii) List the signs of oestrus in farm animals.
(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.
(i) What is colostrum?
(ii) State three benefits a young animal derives from feeding on colostrum.
(i) Distinguish between corrosion and rusting
(ii) Write a balanced equation to represent the rusting of iron
(iii) Describe how clotting of blood occurs
State four advantages of the use of computers.
(i) What is meant by contraception?
(ii) Give three methods of birth control.
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
(i) What is meant by occupational hazard?
(ii) Explain the effects of occupational hazards
(iii) State two ways of preventing occupational hazards
(i) Draw and label a diagram of a hydraulic press
(ii) Explain briefly how the hydraulic press works.
(i) What is grafting?
(ii) State three factors to be considered when planting ornamental plants.
(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.
(i) With the aid of a labelled diagram, describe the laboratory preparation of dry ammonia.
(i) What is an essential nutrient?
(ii) For each of the following deficiency diseases, state one nutrient that is lacking:
(i) What is software as applied to the computer?
(ii) Name one group of software.