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9.3 Material cycles and decomposition

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Question 11

A farm in a dry region uses distillation to treat brackish water pumped from a borehole. A technician collects three samples: untreated borehole water, water left in the boiling vessel, and condensed water.

Which sample would have the lowest concentration of dissolved salts?

[1]
A

all three samples have the same salt concentration

B

untreated borehole water

C

water left in the boiling vessel

D

condensed water

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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