
WEST AFRICAN EXAMINATION COUNCIL (WAEC)
June 13, 2025 at 08:41 AM
*1(a)* (Carbon Cycle)
*(i) Name each of the stages labelled A, B, C and D.*
- A: *Green plants / Photosynthesis*
- B: *Animals / Consumers*
- C: *Dead organisms / Organic matter*
- D: *Decay / Decomposition*
*(ii) Name each of the processes labelled P, S and T.*
- P: *Feeding*
- S: *Decay and conversion to fossil fuel*
- T: *Combustion (burning of fossil fuel)*
*(iii) State three activities of humans that could disrupt the cycle.*
1. *Deforestation*
2. *Burning of fossil fuels*
3. *Industrial pollution / Emission of greenhouse gases*
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*1(b)* (Farming Systems)
*(i) Name each of the farming systems labelled K and L.*
- K: *Crop rotation*
- L: *Mixed cropping / Crop rotation with plot rotation*
*(ii) Give the reason for each of the names given in (i).*
- K: Crops are rotated on the same land over time.
- L: Crops are rotated on different plots each season.
*(iii) State two ways in which the farming system K is of importance to the farmer.*
1. Helps *maintain soil fertility*.
2. *Reduces pests and diseases* in crops.
*(iv) Give three reasons why the farming system K is not being encouraged in recent times.*
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♤MR GABRIEL MARSHALL
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