When beginning this module the
teacher should have already taught the processes of photosynthesis and
respiration. The students should have a clear understanding of these processes and
can understand what is included in the reactants and the products. The students
should also know which organisms use these processes.
On the other hand, the students
will not be given much information on the different factors or the parameters
they affect. The students will do research on this part of the module.
Each student team will be given
only 1 of the 5 data sheets. Hopefully
this will cut down on the amount of sharing done between groups.
When using the STELLA model, do
not tell the students ahead of time to use only one slider at a time. Allow this
to be part of their discovery. Hopefully they will remember about a controlled
experiment.
Another experiment that could be done with this activity:
Take a field trip to a local river or other body of
water. Have students take water samples and determine the dissolved oxygen in
each sample using dissolved oxygen kits or probes.
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