Question 3
- Name each of the methods labelled A and B. [2 marks]
- State:
- one advantage each of the methods labelled A and B.[2 marks]
- two disadvantage each of the methods labelled A and B.[4 marks]
- Mention two pests that could be found in the method labelled B when it is properly kept[2 marks]
The diagrams below illustrate methods used in waste management. Study them and answer questions 3 (a) to (c).
Observation
Majority of the candidates that attempted this question were able to answer some of the questions satisfactorily.
The expected answers are:
- Name methods labelled A and B
A - incinerator
B - refuse bin/dust bin/waste bin
-
- Advantage of the method labelled A
- - it can cater for large volume of refuse
- - bad odour is not perceived
- - easy to manage/ to empty
- - it is not costly
- Disadvantages of the method labelled A
- - very expensive to construct
- - air pollution/ generates ashes /soots / smoke
- - it can be used for refuse waste only
- - it can harbour rodents/ pests
- - it can be used for small quantity of refuse only/ easily filled up
- Advantage of the method labelled A
- Pests that could be found in the method labelled B
- - cockroaches
- - houseflies
- - rodents/ rat/mice
- - maggots
- - spiders
- - mosquitoes
- - ants