SC Gr 11 Practical Task 3 3 CAPS Capricorn District August JESTION 2 udy the table below which refers to the effect of exercise on the composition of haled air and answer the questions that follow. Gas Proportion of gases in different air samples (%) Exhaled air Inhaled air At rest During exercise 0,04 4 9 Carbon dioxide Oxygen 21 17 12 Nitrogen 78 78 78 1 Draw a bar graph to represent the exhaled air. (7) 2 Name ONE common gas, not shown in the table, which would most likely be (1 ) more concentrated in exhaled air than in inhaled air. 2.3 Explain why air exhaled during exercise contains more carbon dioxide than air exhaled at rest. (2) 2.4 Calculate the increase in the percentage of oxygen absorbed by the lungs during (3) exercise. 2.5 Explain why there is no difference in the volume of nitrogen in the inhaled air and (2) exhaled air. TOTAL QUESTION 2: [15 Please turn ov Copyright reserved​