CAIE IGCSE Biology 11.1.4 Inspired vs Expired Air Composition
Practise describing differences in oxygen, carbon dioxide and water vapour between inspired and expired air.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- state that inspired air contains about 21% oxygen and 0.04% carbon dioxide
- state that expired air contains about 16% oxygen and 4% carbon dioxide
- state that expired air contains more water vapour while nitrogen changes little
11.1.4—Differences in composition between question 1
Complete Table 3.1 by writing in the percentages of carbon dioxide and oxygen in inspired air and in expired air.
Table 3.1
All question bank results loaded