Is GCSE Chemistry or Physics harder?

It depends on you: GCSE Physics is more maths-heavy (equations, rearranging, units), while GCSE Chemistry is more about abstract explanations plus the moles calculations. Physics suits confident mathematicians; Chemistry suits students who like structured explanations.

GCSE Combined Science

Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).

What makes it challenging

  • Physics: heavier on equations, rearranging and unit conversions.
  • Chemistry: fewer equations but abstract bonding/structure explanations and moles.
  • Both have required practicals and both reward precise written answers.
  • Your own strengths (maths vs written explanation) usually decide which feels harder.

The topics students find hardest

  • Physics: equations, electricity, forces
  • Chemistry: moles, bonding, electrolysis
How to do well: Whichever you find harder, the fix is the same: targeted practice on the specific question types you drop marks on, with feedback.

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