Figure 1. After resting
comfortably in a chair for 10
minutes, the student gently
blows through a straw into a
jar containing a solution of
water and bromothymol
blue.
Figure 2. After walking for 10
minutes, the student gently
blows through a straw into a
jar containing a solution of
water and bromothymol
blue.
Figure 3. After running for 10
minutes, the student gently
blows through a straw into a
jar containing a solution of
water and bromothymol
blue.
resting
walking
running
bubbles
144
116
27
Table 1. The number of bubbles required to change the bromothymol blue solution from blue to yellow.
1. What is the name of the molecule contained within the bubbles that caused the bromothymol blue
solution to change from blue to yellow?
2. and 3. Name both reactants in the respiration equation.
4. Which activity, if any, used the least amount of oxygen?
5. Which activity, if any, had the greatest rate of respiration?
6. What organelle within the cell does respiration?
7. What is the purpose of respiration?
8. Use Table 1 to construct a bar graph that shows the results of the experiment.
9. About how many bubbles would jogging require to change the bromothymol blue to change from
blue to yellow?
10. When it is cold out, what specifically does the student see when he exhales?