Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

TopicSkillDifficulty

12 questions

SA-OB-PK-0011 markL1 FoundationCalculatorPlanning

The variable you change in an experiment is the

Salam Academy Original Practice · Proposed mark scheme

SA-OB-PK-0121 markL1 FoundationCalculatorData and drawings

In a results table, units should be written

Salam Academy Original Practice · Proposed mark scheme

SA-OB-PK-0021 markL2 StandardCalculatorPlanning

A control experiment using boiled enzyme shows that

Salam Academy Original Practice · Proposed mark scheme

SA-OB-PK-0031 markL2 StandardCalculatorPlanning

Temperature is best kept constant using

Salam Academy Original Practice · Proposed mark scheme

SA-OB-PK-0041 markL2 StandardCalculatorEvaluating

Repeating an experiment and calculating a mean improves

Salam Academy Original Practice · Proposed mark scheme

SA-OB-PK-0052 marksL2 StandardCalculatorData and drawings

Results:

12, 14, 13, 30

. Calculate the mean excluding the anomalous result.

Salam Academy Original Practice · Proposed mark scheme

SA-OB-PK-0061 markL2 StandardCalculatorData and drawings

Biological drawings should

Salam Academy Original Practice · Proposed mark scheme

SA-OB-PK-0071 markL2 StandardCalculatorData and drawings

For continuous data such as temperature against rate, the best graph is

Salam Academy Original Practice · Proposed mark scheme

SA-OB-PK-0081 markL2 StandardCalculatorPlanning

In CORMS, "O" reminds you to keep the same

Salam Academy Original Practice · Proposed mark scheme

SA-OB-PK-0092 marksL2 StandardCalculatorData and drawings

A drawing of a cell is

60

mm long; the actual cell is

0.12

mm. Calculate the magnification.

Salam Academy Original Practice · Proposed mark scheme

SA-OB-PK-0101 markL2 StandardCalculatorEvaluating

An experiment that tests what it claims to, with variables controlled, is

Salam Academy Original Practice · Proposed mark scheme

SA-OB-PK-0111 markL3 ExamCalculatorEvaluating

Students measuring photosynthesis by counting bubbles get very variable results. The best improvement is to

Salam Academy Original Practice · Proposed mark scheme