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Interpreting data collected for O2 levels by Dinorah Hudson |
Name: ______________ House: _______
Science Date: ________
Part 3: Interpreting data collected for O2 levels
Aim: How do we identify different activities based on oxygen level graphs?
Directions: You are given a set of four different graphs that represent oxygen levels during four different activities. Your group is to determine what graph represents the given activity. You will be allowed to use the O2 gas sensors in order to help you come to a conclusion.
These resulting graphs were recorded using the same settings defined below. Based of off the information provided and the materials you have been given, determine which graph represents which activity.
**Note: Be sure to pay close attention to the x- and y-axes.
1-Which graph represents breathing normally? ______________________
2-Explain how your group came to this conclusion? ___________________
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3-Which graph represents breathing rapidly? ______________________
4-Explain how your group came to this conclusion? ___________________
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5-Which graph represents fanning the sensor? ______________________
6-Explain how your group came to this conclusion? ___________________
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7-Which graph represents exhaling slowly? _______________________
8-Explain how your group came to this conclusion? ___________________
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O2 Sensor Graphs of Various Activities
Answer Key:
1 and 2- Breathing normally is represented by chart 1. The possible explanation for this conclusion should include observations of how O2 levels decrease for approximately 5 seconds and increase for approximately 5 seconds continuously until the end of the sample recording.
3 and 4-Breathing rapidly is represented by chart 3. Possible conclusions should reflect that although chart 3 is constantly decreasing throughout the sample collection time, as is chart 2, however there is still a fresh supply of oxygen moving past the sensor only more frequently (unlike what would happen if your were to exhale slowly over the sensor). Additional observations should indicate that the levels never go below 18%, which is very similar to results recorded in chart 1.
5 and 6- Fanning the sensor is represented by chart 4. Possible conclusion should reflect that the value of O2 levels do not change significantly throughout the sample collection time. This is because no O2 –CO2 gas exchanges were occurring.
7 and 8-Breathing rapidly is represented by chart 2. Possible explanation might include a comparison to chart 3 when describing the shape of the graph. However, when exhaling slowly over the sensor there is never a fresh supply of O2 moving through the sensor, which would result in a continual decline in O2 levels.
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