Case study·Hard exam skill (4/5)·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 student places equal masses of dry sand and water in identical shallow trays under the same sunlight. After minutes, the sand shows a larger temperature rise.
Total: 4 marks
(a) Which material warmed more? (1 mark)
(b) What condition was kept the same to make the comparison fair? (1 mark)
(c) What does this show about Earth's surface materials? (1 mark)
(d) Name one atmospheric phenomenon this helps explain. (1 mark)
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