What the paper is actually testing
Competency-based questions do not ask you to recall a definition. They give you an unfamiliar situation — a graph from an experiment, a short paragraph about a farmer's field, a circuit you have never seen — and ask you to apply a concept you already know.
This means memorising answers has almost no value here. What has value is knowing, for each chapter, the two or three principles that everything else is built on.
A four-step method
Use the same sequence every time so that unfamiliar wording stops being frightening.
- Underline the quantities that are given, with their units.
- Name the concept in one word: reflection, resistance, neutralisation, reflex arc.
- Write the governing relationship or rule before doing anything else.
- Answer only what was asked, then check the units and the direction or sign.
Physics: read the diagram twice
In light and electricity questions the diagram carries information the text leaves out — where the object is relative to the focus, whether resistors are in series or parallel, which terminal is positive. Redraw the circuit as a clean straight line before calculating; most parallel-versus-series mistakes disappear immediately.
Chemistry: reactions are stories
Do not memorise equations as strings of symbols. Memorise what each reaction does: displacement means a more reactive metal pushes out a less reactive one; neutralisation always produces salt and water. When a case study describes rust on a gate or milk turning sour, you are being asked to name the story, not the formula.
Balance every equation you write, including in one-mark answers. It is the cheapest mark in the paper.
Biology: define, then extend
Biology competency questions usually reward a two-part answer: the definition or process in one sentence, then its consequence in the described situation. If a question describes a person whose diet lacks iodine, say what iodine is required for, then state the resulting condition. Two clean sentences will out-score half a page of surrounding detail.