IB Physics SL S2.1.3 Controlling Variables

Practise identifying a physically relevant control variable and explaining how keeping it fixed allows changes in the dependent variable to be interpreted fairly.

Syllabus
First assessment 2025
Objective
S2.1.3
Level
SL

Exam points

  • state a relevant apparatus, material or environmental variable that must remain constant
  • explain how holding that variable fixed prevents it from confounding the measured relationship

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