Cambridge IGCSE Environmental Management practice

Paper 1 structured question: Managing atmospheric pollution

Try the question first, then check the answer and practise the same topic again.

At a glance

Paper

Marks

Topic

Managing atmospheric pollution

Exam-style question

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Paper 1TheoryPractical5 marks

A factory releases sulfur dioxide (SO2) into the atmosphere, causing acid rain in the surrounding area.

Results Table

The table shows SO2 emissions before and after installing FGD technology in the factory.

Time	SO2 Emissions (mg/m³)
Before FGD	150
After FGD	30

a
Calculate the percentage reduction in SO2 emissions after installing FGD.
Your answer
Aim for approximately 2 distinct marking points.
[2]
b
Explain how flue-gas desulfurization helps reduce atmospheric pollution.
Your answer
Aim for approximately 2 distinct marking points.
[2]
c
Suggest one other method the factory could use to reduce atmospheric pollution.
Your answer
Aim for approximately 1 distinct marking point.
[1]

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Paper 1TheoryPractical6 marks

Method

You are asked to design a simple investigation to measure the effect of different types of fuel on vehicle emissions using a gas analyzer.

a
State the independent variable in this investigation.
Your answer
Aim for approximately 1 distinct marking point.
[1]
b
Identify two control variables that should be kept constant during the investigation.
Your answer
Aim for approximately 2 distinct marking points.
[2]
c
Describe how you would ensure the reliability of the data collected.
Your answer
Aim for approximately 2 distinct marking points.
[2]
d
Suggest one safety consideration when conducting this investigation.
Your answer
Aim for approximately 1 distinct marking point.
[1]