Choosing between Pure Physics (G3) and Combined Physics (G2/G1) is one of the first major academic decisions students and parents face in secondary school. The choice affects not only subject workload, but also future pathways in upper secondary, JC, and certain post-secondary science courses.
This guide is written to help:
- Sec 2 students deciding which science track to enter next year
- Sec 3 students reviewing whether their current choice is the right fit
There is no universally “better” option. The right choice depends on readiness, interest, and long-term goals.
What Is the Difference Between Pure and Combined Physics?
Pure Physics (G3) is a full science subject focused entirely on Physics.
Combined Physics (G2/G1) studies Physics together with another science.
Science Combination:
- G2 Science (Physics/Chemistry) – (Syllabus 5105)
- G2 Science (Biology/Chemistry)
- G3 (Science) (Physics/Chemistry)- (Syllabus 5086)
- G3 (Science) (Biology/Chemistry)
The key difference is depth and pace, not just difficulty.
What Students Learn in Pure Physics (G3)
Pure Physics goes deeper into physical concepts and mathematical application.
Students will be taking all the concepts from G2 and an additional on:
- Newtonian Mechanics, “Turning effect of forces”
- Waves, “Light”
- Electricity and Magnetism, “magnetism and electromagnetism”
Students are expected to explain phenomena clearly, apply formulas accurately, link ideas across topics, and most importantly answer with precision (examiners are looking for correct terminology and keywords).
Pure Physics prepares students for:
- JC H2 / H1 Physics
- Science, engineering, and technology-related pathways
- Strong analytical and problem-solving skills
What Students Learn in Combined Physics (G2/G1)
Combined Physics covers core ideas but with reduced depth and fewer topics. The pace is more measured, and questions tend to be more direct.
Topics for G1/G2 Physics include the core components of:
- Measurement
- Newtonian Mechanics
- Thermal Physics
- Waves
- Electricity and Magnetism
- Radioactivity
Combined Physics suits students who prefer a more balanced workload, are building confidence in Math or Science or students who do not require Pure Physics for future subject combinations in JC, Polytechnic and ITE applications.
Workload and Assessment Differences
In general, pure G3 Physics requires more consistent revision because concepts build on each other but the topics taught are very similar to G2 Physics.
Students need to be comfortable with abstract thinking and multi-step questions.
Importantly, Pure Physics is not about memorisation, and Combined Physics is not “easy Physics”. Both require understanding, but at different levels of depth.
Do note as well that the subjects are also offered with the condition that students meet the requirements. For G3 science, schools requirements are:
- Scores at least a 50% for Science
- Meet Progression Criteria (such as being offered G3 in secondary 1 and 2 intake).
Should a Sec 2 Student Upgrade to Pure G3 Physics?
A student may consider Pure Physics if they meet the criteria.
This is a good option if you are someone that enjoys understanding how things work, are coping well with lower-secondary Science and reasonably comfortable with Math concepts.
However, a student may be better suited for Combined G2 Physics if they are unsure about pursuing science long-term and want to manage overall academic load carefully. At Sec 2, interest and learning habits matter more than current grades alone.
Should a Sec 3 Student Switch Tracks?
Some Sec 3 students realise early in the year that their current track may not suit them.
On one hand. a switch to Pure Physics may be considered if combined Physics is insufficiently challenging or they plan to take Physics at JC level. Given that Sec 3 is the later part of the secondary education, students must be willing to catch up on missed topics.
On the other hand, a switch to Combined Physics may be appropriate if the student is struggling with pace and abstraction, physics is affecting performance in other subjects or the student’s future pathway does not require Pure Physics.
Such decisions should be made early and with guidance, as syllabus gaps widen over time.
A Balanced Way Forward
Choosing between Pure Physics (G3) and Combined Physics (G2/G1) is about finding the right fit for how a student learns, not about labels or comparisons. Whether a student is building foundations early, reassessing their direction mid-stream, or adjusting later in the year, support at the right time can make a meaningful difference.
All students are welcome to start where they are.
Excel in Physics with PivotPhysics Tuition
PivotPhysics offers specialised Physics tuition for O-Level, A-Level H1/H2, and IP Physics students in Singapore.
With a proven track record, our lessons combine clear concept teaching, real-life applications, and exam-focused techniques to build a strong foundation and boost confidence in Physics.We also provide Physics Practical Lab Coaching aligned with SEAB standards to help students excel in their Paper 3 components.
👉 Contact us today to find out how PivotPhysics can support you or your child in achieving excellence in O-Level, A-Level, or IP Physics.
