Chemistry 0620 · IGCSE · Air quality and climate

Air quality and climate — practice question

The carbon cycle explains how carbon dioxide gas is transferred into and out of the atmosphere. Which row shows how carbon dioxide moves in each process?

  • Aphotosynthesis: added to the atmosphere; combustion: added to the atmosphere; respiration: removed from the atmosphere
  • Bphotosynthesis: added to the atmosphere; combustion: removed from the atmosphere; respiration: added to the atmosphere
  • Cphotosynthesis: removed from the atmosphere; combustion: added to the atmosphere; respiration: added to the atmosphere
  • Dphotosynthesis: removed from the atmosphere; combustion: added to the atmosphere; respiration: removed from the atmosphere

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