Carefully study specimens J and K and answer questions 4(a) to 4(d). (a) Name the type of refuse in specimens: (i) J (ii) K. (b) List three animal vectors o...
Question 1 Report
Carefully study specimens J and K and answer questions 4(a) to 4(d).
(a) Name the type of refuse in specimens: (i) J (ii) K.
(b) List three animal vectors of disease causing organisms that breed on a each of specimens J ana K.
(ii) Name four diseases each caused by animal vectors associated with each or specimen J and K.
(c) Name one method of disposal of each of specimens J and K in: (i) rural areas (ii) urban areas.
(d)(i)State four effects of improper disposal of specimen K
(ii) In a tabular form. state five differences between specimens J and K.
(iii) outline one way in which specimen J is of importance to farmers.
Answer Details
(a) Type of refuse: (i) Specimen J is dry refuse (solid waste). (ii) Specimen K is wet refuse (sewage / liquid waste).
(b)(i) Three animal vectors that breed on each: On J - housefly, cockroach and rat. On K - housefly, mosquito (female Anopheles or Aedes) and snail.
(b)(ii) Four diseases spread by the vectors of each: Associated with J - typhoid, cholera, dysentery and diarrhoea. Associated with K - malaria, yellow fever, bilharzia (schistosomiasis) and elephantiasis.
(c) One method of disposal of each:
(i) Rural areas - J: refuse dump / burying / composting; K: pit latrine / soakaway pit.
(ii) Urban areas - J: sanitary landfill / incineration; K: septic tank and sewage treatment.
(d)(i) Four effects of improper disposal of specimen K (sewage): contamination of water bodies (water pollution); offensive odour; source and spread of diseases; pollution of the soil.
(d)(ii) Five differences between specimens J and K:
| Specimen J (dry refuse) | Specimen K (wet refuse / sewage) |
|---|---|
| Dry solid waste | Wet liquid waste |
| Contains little or no water | Contains a large proportion of water |
| Can be kept for a long period | Cannot be kept for long |
| Can be burnt | Cannot be burnt |
| Can be compacted / compressed | Cannot be compacted |
(d)(iii) One way specimen J is of importance to farmers: when buried or composted it decays into organic manure that enriches the soil and improves its fertility.
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