Paper 1 structured question: Managing atmospheric pollution
Paper 1TheoryPractical6 marks
Method
Investigation Method to Measure Vehicle Emissions
You are asked to design a simple investigation to measure the effect of different types of fuel on vehicle emissions using a gas analyzer.
| Fuel type | CO concentration (ppm) | NOx concentration (ppm) |
|---|---|---|
| Petrol | ||
| Diesel | ||
| Electric (control) |
- a[1]
State the independent variable in this investigation.
- b[2]
Identify two control variables that should be kept constant during the investigation.
- c[2]
Describe how you would ensure the reliability of the data collected.
- d[1]
Suggest one safety consideration when conducting this investigation.