Which Science Should I Take in IB? (Biology vs Chemistry vs Physics)
Choosing a science subject in the IB Diploma Programme is a big decision—it shapes your academic experience, influences your university options, and can impact how much you enjoy the next two years. This guide breaks down the key differences between IB Biology, Chemistry, and Physics, supported by expert insights and blog resources from RevisionDojo.
1. Overview: How the Sciences Compare in IB
- Biology focuses on life systems, human anatomy, ecology, and molecular processes.
- Chemistry dives into reactions, lab work, organic compounds, and analytical methods.
- Physics explores motion, energy, forces, and mathematical reasoning.
For a full side-by-side subject comparison, see RevisionDojo’s IB Science Difficulty Guide.
2. Which Science Is the “Easiest” or “Hardest”?
Alumni often say:
- Biology HL requires heavy memorization.
- Chemistry HL is conceptually complex and lab-heavy.
- Physics HL is mathematically demanding.
The difficulty also depends on your learning style. This blog discusses which science subjects students regret or love based on their expectations.
3. What Science Should I Take Based on University Goals?
Here’s a simple breakdown:
Career PathRecommended IB ScienceMedicineChemistry HL + Biology HL/SLEngineeringPhysics HLEnvironmental ScienceBiology HLPharmacyChemistry HLArchitecturePhysics HL/SLPsychologyBiology HL
Learn more in RevisionDojo’s guide on subject selection for university.
