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9.3 Material cycles and decomposition

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Question 10

During a long dry period, a saline lake receives no rainfall and no inflow of water. Its only loss of water is to the air.

Explain how water from the lake could become rainwater with a lower dissolved salt concentration. Then predict and explain how the dissolved salt concentration in the lake will change during this period.

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Markscheme

9.3 Material cycles and decomposition Questions

  1. GCSE
  2. /Biology
  3. /9.3 Material cycles and decomposition

101 exam-style questions on Edexcel GCSE Biology 9.3 Material cycles and decomposition, covering 9.3.1 Cycling of materials through ecosystems, 9.3.2 The carbon cycle, 9.3.3 The water cycle, 9.3.4 The nitrogen cycle, 9.3.5 Indicator species and pollution, 9.3.6 Decomposition in preservation and composting, and 9.3.7 Rate changes in decay of biological material. Each one has a worked solution and a mark scheme showing where the marks go.

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