Descriptive Questions in FBISE SSC
Domain 2 - Descriptive Questions - tests whether you can construct an answer, not merely recognise one. FBISE SSC descriptive sections usually contain short-answer questions and longer extended-response questions, often with internal choice. Marks are awarded for correct content, logical sequence, correct terminology, units, and labelled diagrams where relevant. A blank page scores zero even when you know the topic; a partly structured answer can still earn marks.
Read the command word first
- Define / state: give a precise one-sentence answer.
- Describe: say what happens or list the features.
- Explain: give the reason or mechanism, usually with a cause-effect link.
- Differentiate: give paired, directly comparable points.
- Calculate / derive: show the formula, substitution, working, and unit.
Answer architecture
For a short item (typically two marks), give two separate accurate points and stop. For a longer item, use this order: opening definition or law; explanation in numbered steps; equation or labelled diagram; one example or application; brief closing sentence that answers the question.
Worked example
“State Ohm’s law and explain how the resistance of a metal wire depends on its length and cross-sectional area.”
A strong answer states that, at constant temperature, current is directly proportional to potential difference (V = IR). It then uses R = ρL/A: a longer wire gives more collisions along the path, so resistance increases with length; a larger cross-sectional area gives more paths for charge, so resistance decreases as area increases. The answer keeps material and temperature constant and names the unit of resistance, the ohm (Ω). This earns the definition mark, the relationship marks, and the explanation marks.
Traps that cost marks
- Writing everything you know instead of answering the command word.
- Giving one point twice and calling it two marks.
- Omitting units in a calculation or on a graph axis.
- Drawing an unlabelled diagram.
- Using vague pronouns such as “it” when the examiner needs the named quantity.
- Spending so long on one long answer that a later, easier question is left blank.