CAIE IGCSE Biology 11.1.4 Differences in composition between
CAIE IGCSE Biology 11.1.4 Differences in composition between
Practise comparing inspired and expired air using tables, percentages and gas names for oxygen, carbon dioxide and water vapour.
How this is tested
- complete tables with approximate O2 and CO2 percentages for inspired and expired air
- distinguish expired air as lower in oxygen, higher in CO2 and richer in water vapour