Respiration

History Channel video showing the use of re-breathers. Why do we breath? What does a re-breather do? The use of re-breathers to promote thinking about respiration and cellular respiration. http://www.history.com/topics/titanic/videos/titanic-tragic-sister-ship?m=528e394da93ae&s=undefined&f=1&free=false

Details of the experiment above. http://www.phschool.com/science/biology_place/labbench/lab5/features.html

CO2 Problem Apollo 13 http://www.discoveryuk.com/web/the-true-story/video/?video=apollo-13-co2-problem Two parts http://www.discoveryuk.com/the-loop/critical-explosion-cripples-apollo-13/

Bromothymol Blue, exhale through straw, elodea, and light activity []