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9.3 Material cycles and decomposition

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Question 44
H

Aerobic decomposers grow on dead plant material in an opaque container. Air passes through the container.

Compared with incoming air, which change is expected in the outgoing air?

[1]
A

More oxygen and less carbon dioxide

B

Less oxygen and more carbon dioxide

C

More oxygen and more carbon dioxide

D

Less oxygen and less carbon dioxide

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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