Health Education Paper 2 WASSCE (PC SECOND SERIES), 2020

Question 9

 

 

(a)  Explain briefly the following methods of food preservation:                                    
(i) freezing;
(ii) pasteurization;
(iii) canning.                                                                                        [9 marks]
(b) Make a drawing 8cm to 10cm long of a cervical vertebra and label fully.        [7 marks]                                                                    
(c) List four other bones that belong to the vertebral column.                              [4 marks]

 

 

Observation

 

 

Majority of the candidates provided wrong answers. They had difficulties giving concise answers to
 9 (a)(i),(ii) and (iii). Many candidates also scored low marks in the diagram of 9(b). Poor spellings also led to loss of vital marks in 9(c).

 

The expected answers are:

 

(a)(i)   Freezing
Keeping food under a low temperature; to prevent the growth of microorganisms; and slow down chemical changes.        

(ii)    Pasteurization
is a process of heating milk at high temperature below boiling point; and cooling rapidly; to eliminate /destroy microorganisms.

(iii)   Canning
Removal of air from food before it is sealed in air tight containers, and later heated to high temperature; before it is finally cooled.

 

 

(c)Other bones of the vertebral column

 

  • Thoracic
  • Lumbar
  • Sacral
  • Caudal/coccyx