The Solar System — Easy
Recall and familiar applications. Optional hints help you find a first step.
Includes extension practice
Solar-System membership, gravity and orbital speed are included. Detailed formation, planet-property comparisons and eccentric-orbit treatment 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 · P5.1.1 and P5.2.1, pp58–59
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