Gases and the absolute scale of temperature — Difficult
Transfer your understanding to a changed context, justify decisions and check your reasoning. No hints during the test.
Includes extension practice
Qualitative pressure changes are included. Kelvin conversions, absolute-pressure calculations and pV = constant are extension practice.
Easy, Normal and Difficult describe practice demand; they are not the official Core and Extended tiers.
- Cambridge IGCSE Combined Science 0653 syllabus 2028–2029 · P2.1.3, p49
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