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Investigating the effectiveness of different methods to control mosquito populations to reduce malaria transmission.
Method
Method to Test Mosquito Control Techniques
A student sets up three small enclosed areas with stagnant water to breed mosquitoes. Area A is left untreated as a control. Area B is treated with an insecticide spray. Area C has mosquito larvae removed daily. The number of adult mosquitoes emerging is counted after 10 days.
| Area | Treatment | Number of Adult Mosquitoes |
|---|---|---|
| A | No treatment | 50 |
| B | Insecticide spray | 10 |
| C | Larvae removal | 15 |
- a[1]
State the independent variable in this investigation.
Aim for approximately 1 distinct marking point.
- b[1]
Identify the dependent variable in this investigation.
Aim for approximately 1 distinct marking point.
- c[2]
Suggest one control variable that should be kept constant in this investigation and explain why.
Aim for approximately 2 distinct marking points.
- d[2]
Describe how the student could improve the reliability of the results.
Aim for approximately 2 distinct marking points.
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