Barometer (Alan Kodel)
Author
Alan Kodel-Vaughn Next Century Learning Center
Sensor / Probe
The barometer on your phone is able to measure the surrounding atmospheric pressure. There are a variety of applications that use this feature on smartphones.
Sample Investigation
Students in a Physiology or PE class can see the effect that atmospheric pressure has on exercise performance. As air pressure decreases the partial pressure of oxygen of oxygen decreases and less enters the lungs in each breath. Breathing rate will increase to compensate but max performance is still affected. Students would perform a particular exercise such as a run at various altitudes.
The effect of air pressure (independent variable) on the time(dependent variable) it takes to complete a 5 mile run.
Sample Data & Analysis and Interpretation
This chart shows an average mile timer for a 5 mile run at different altitudes. Higher altitudes correspond with lower atmospheric pressure and it is evident that the run takes a longer time as atmospheric pressure decreases.
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