Case study·Challenge (5/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
A town observes hotter afternoons after many open grounds are paved and tree cover is reduced. Rainwater also runs off faster and nearby drains overflow more often.
Total: 4 marks
(a) Identify one change in the biosphere. (1 mark)
(b) Explain one reason for hotter afternoons. (1 mark)
(c) Explain why runoff increased. (1 mark)
(d) Suggest one solution that addresses both heating and runoff. (1 mark)
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