The Sun as a star — Difficult
Transfer your understanding to a changed context, justify decisions and check your reasoning. No hints during the test.
Includes extension practice
Sun composition, light-years, light-travel time and fusion are included. Detailed stellar-equilibrium mechanisms add 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 · P5.2.1, pp58–59
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