A museum stores a woven mat made from dead plant material. Microorganisms are present on the mat, which remains moist and at a temperature suitable for decomposition. After one year, the mat has lost very little mass and only a small amount of carbon dioxide has been released.
Which storage condition is most likely?
A sealed case filled with oxygen before it is closed.
A perforated case through which room air circulates continuously.
A sealed case from which most of the air has been removed.
A case opened each day to release accumulated carbon dioxide.
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.