18 exam-style questions · Biology only (B): not in Science (Double Award). Write your answer, check it against the mark scheme and tick the points you earned. Your marks stay on this device. Your writing is not saved.
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5.18B Deforestation
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Explain the effects of deforestation on the environment.
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Total for this question: 4 marks
5.18B Deforestation
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Explain how deforestation leads to soil erosion.
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Total for this question: 2 marks
5.18B Deforestation
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How does deforestation increase atmospheric CO₂?
(1)Total for this question: 1 mark
5.18B Deforestation
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Explain why deforestation can lead to flooding.
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Total for this question: 2 marks
5.18B Deforestation
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Explain why soil becomes infertile after deforestation.
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Total for this question: 2 marks
5.18B Deforestation
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Explain how deforestation affects the water cycle.
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Total for this question: 2 marks
5.18B Deforestation
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Suggest why people cut down tropical rainforests.
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Total for this question: 2 marks
5.18B Deforestation
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Suggest two ways to reduce the effects of deforestation.
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Total for this question: 2 marks
5.18B Deforestation
Exam question
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Illustrative data.
| Year | Forest / thousand km² |
|---|---|
| 1990 | 420 |
| 2000 | 380 |
| 2010 | 330 |
| 2020 | 300 |
Calculate the mean rate of forest loss per year from 1990 to 2020.
(2)Total for this question: 2 marks
5.18B Deforestation
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Explain why the loss of rainforest may reduce the number of new medicines discovered.
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Total for this question: 2 marks
5.18B Deforestation
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Explain why deforestation reduces biodiversity.
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Total for this question: 2 marks
5.18B Deforestation
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Describe the effect of burning cleared forest on the atmosphere.
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Total for this question: 2 marks
5.18B Deforestation
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Identify the process in trees that removes carbon dioxide from the air.
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Total for this question: 1 mark
5.18B Deforestation
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Explain why replanting trees does not immediately replace lost biodiversity.
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Total for this question: 2 marks
5.18B Deforestation
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Compare the carbon storage of a mature forest and farmland that replaces it.
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Total for this question: 2 marks
