Cambridge IGCSE Physics · Volume A
Learn one idea at a time: a clear explanation, a worked example, an interactive activity, then questions with hints and explained answers. Supplement-only material will be labelled clearly.
Course identity: Cambridge International IGCSE Physics (0625), an international examination syllabus. This is separate from Egypt’s Thanaweya Amma / Egyptian Baccalaureate and is not a Year 3 course. This course is being built lesson by lesson from the supplied Volume A; explanations and practice are written for this course.
Chapter 1 · Measuring and Describing Motion
Start with the tools and habits that make every later physics measurement more trustworthy.
Scalars and vectors · Supplement / Extended only
Start this lessonSpeed, velocity and distance-time graphs
Start this lessonAcceleration and speed-time graphs
Start this lessonFree fall and terminal velocity
Start this lessonChapter 2 · Mass, Weight and Density
Begin by separating the amount of matter in an object from the gravitational force acting on it.
Mass, weight and gravitational field strength
Start this lessonDensity
Start this lessonChapter 3 · Forces
Discover how pushes and pulls combine and change motion.
Forces, resultant force and friction
Start this lessonSprings and load-extension graphs
Start this lessonForce, mass and acceleration; circular motion · Supplement / Extended only
Start this lessonMoments and equilibrium · Core + Supplement / Extended
Start this lessonCentre of gravity and stability · Core
Start this lessonMomentum and impulse · Supplement / Extended only
Start this lessonChapter 4 · Energy, Work, Power and Pressure
Energy stores, transfers and conservation · Core + Supplement / Extended
Start this lessonKinetic and gravitational potential energy · Supplement / Extended only
Start this lessonWork and power · Core
Start this lessonEnergy resources · Core + Supplement / Extended
Start this lessonEfficiency · Core + Supplement / Extended
Start this lessonPressure, including pressure in liquids · Core + Supplement / Extended
Start this lessonAll six Chapter 4 lessons are available.
Chapter 5 · The Particle Model and Gases
States of matter and the particle model · Core + Supplement / Extended
Start this lessonGas pressure and Brownian motion · Core + Supplement / Extended
Start this lessonGases, pressure–volume and the kelvin scale · Core + Supplement / Extended
Start this lessonAll three Chapter 5 lessons are available.
Chapter 6 · Thermal Properties
Thermal expansion · Core + Supplement / Extended
Start this lessonInternal energy and specific heat capacity · Core + Supplement / Extended
Start this lessonMelting, boiling, condensing and evaporation · Core + Supplement / Extended
Start this lessonAll three Chapter 6 lessons are available.
Chapter 7 · Transfer of Thermal Energy
Conduction · Core + Supplement / Extended
Start this lessonConvection · Core
Start this lessonThermal radiation · Core + Supplement / Extended
Start this lessonEveryday and complex applications of heat transfer · Core + Supplement / Extended
Start this lessonAll four Chapter 7 teaching lessons are available.
Source alignment: Physics-0625 Volume A. All 29 Volume A teaching lessons across Chapters 1–7 are available. This is not the full Cambridge syllabus: chapter-review and mixed-review activities remain separate work, and Volume B interactive lessons are not yet linked here. Syllabus objective identifiers and source pages are shown within each lesson for checking against the Cambridge 2026–2028 syllabus.