CII Experimental Data and Exercies

This web page is for completing the lab exercise for that we did with your CII class.  The data you need is compiled below, with the computer type you used identifying the data.  But since we have 3 replications of the same experiment, I am going to ask each of you to use the data from all three experiments as you do the following exercises.

One of the challenges of experimental work is avoiding personal biases that may distort our conclusions.  One's prior expectation about what the result should be can cause data to be misinterpreted, or if the contrary result is obvious, to create contorted explanations for the unexpected results.  At the same time, a result that contradicts expectations (especially if the expectations are built on many prior experiments of significance) should be treated as suspect, and efforts made to explain the discrepancy in a way that resolves the contradictions with past experience.

As you might imagine, the political heat surrounding the anthropogenic climate change topic means that both sides of the previous paragraph apply and conclusions either way will be closely scrutinized.  A result that seems to contradict the scientific consensus will likely be "jumped on" by critics, especially if it appears that the explanation for the result is trying to resolve the contradiction rather than accept the negative result.  At that same time, however, scientific objectivity requires a good faith effort to resolve the inconsistency even if it appears that we are trying to explain away "inconvenient truths" (pun intended).

In light of the above discussion, I am going to ask you to follow some "rules of order" as you do the following exercise.  There are three parts.  Please do the first one without looking at the other two.  Similarly, don't look at the last part until you have finished the second part.  Each section asks you to look at and respond to the results in a particular way.  Please prepare your responses in a typed form and submit them to your CII instructor, Dr. Strey, by March 14.

Part 1

Part 2

Part 3

Group I:  MacBook Pro computer (closest to the door)

Photo of entire set up

Photo of beaker at end of experiment

Photo of final graph on computer screen

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Group II:  Maroon netbook (middle set up)

Photo of entire set up

Photo of beaker at end of experiment

Photo of final graph on computer screen

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Group III:  Blue netbook computer (farthest from the door)

Photo of entire set up

Photo of beaker at end of experiment

Photo of final graph on computer screen

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