Particle model — Difficult
Transfer your understanding to a changed context, justify decisions and check your reasoning. No hints during the test.
Includes extension practice
Particle arrangements, motion, forces and gas pressure are included. Brownian motion and absolute-zero treatment extend this course.
Easy, Normal and Difficult describe practice demand; they are not the official Core and Extended tiers.
- Cambridge IGCSE Combined Science 0653 syllabus 2028–2029 · P2.1.2, p48
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