C4.2 Transfers of energy and matter Quiz
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5 questions, one answer each
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1. Iron-oxidizing bacteria are:
- A. photoautotrophs
- B. chemoautotrophs
- C. heterotrophs
- D. decomposers
2. In a closed system:
- A. matter and energy both move in and out
- B. only energy moves in and out
- C. only matter moves in and out
- D. nothing moves in or out
3. If 5000 kJ enters primary consumers and 400 kJ passes to secondary consumers, the transfer efficiency is:
- A. 0.08 %
- B. 8 %
- C. 12.5 %
- D. 80 %
4. Primary production is usually measured in:
- A. kJ
- B. g m⁻² yr⁻¹
- C. ppm
- D. g m⁻³
5. The long-term rise in the Keeling Curve is mainly caused by:
- A. more photosynthesis
- B. combustion of fossil fuels
- C. seasonal leaf fall
- D. volcanic activity only