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Practise

Question bank

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

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12 questions

SA-OB-CY-0011 markL1 FoundationCalculatorCarbon cycle

Carbon dioxide is removed from the atmosphere by

Salam Academy Original Practice · Proposed mark scheme

SA-OB-CY-0021 markL1 FoundationCalculatorCarbon cycle

Which process releases carbon dioxide?

Salam Academy Original Practice · Proposed mark scheme

SA-OB-CY-0121 markL1 FoundationCalculatorCarbon cycle

Burning fossil fuels adds

Salam Academy Original Practice · Proposed mark scheme

SA-OB-CY-0031 markL2 StandardCalculatorNitrogen cycle

Nitrogen-fixing bacteria convert

Salam Academy Original Practice · Proposed mark scheme

SA-OB-CY-0041 markL2 StandardCalculatorNitrogen cycle

Nitrifying bacteria convert

Salam Academy Original Practice · Proposed mark scheme

SA-OB-CY-0051 markL2 StandardCalculatorNitrogen cycle

Nitrogen-fixing bacteria are found in the root nodules of

Salam Academy Original Practice · Proposed mark scheme

SA-OB-CY-0061 markL2 StandardCalculatorNitrogen cycle

Denitrifying bacteria are most active in

Salam Academy Original Practice · Proposed mark scheme

SA-OB-CY-0071 markL2 StandardCalculatorCarbon cycle

Fossil fuels formed from organisms that

Salam Academy Original Practice · Proposed mark scheme

SA-OB-CY-0081 markL2 StandardCalculatorWater cycle

Water vapour leaving leaves is called

Salam Academy Original Practice · Proposed mark scheme

SA-OB-CY-0091 markL2 StandardCalculatorNitrogen cycle

Plants use nitrate ions to make

Salam Academy Original Practice · Proposed mark scheme

SA-OB-CY-0101 markL2 StandardCalculatorCarbon cycle

Decomposers return carbon to the air by

Salam Academy Original Practice · Proposed mark scheme

SA-OB-CY-0111 markL3 ExamCalculatorNitrogen cycle

Ploughing waterlogged fields improves nitrate levels because

Salam Academy Original Practice · Proposed mark scheme