learner will construct a basic carbon dioxide chamber using effervescent
tablets as the source of elevated CO2 levels. Seeds will be planted
in a CO2-rich environment and observed over several weeks. The learner
will discover that elevated CO2 levels produce much larger plants
in general; the two most obvious differences being an increased
leaf area and a taller plant. It will be crucial to use a control
group that grows under the exact same conditions, the only exception
being normal CO2 levels. Utilizing a control group is the only way
students will actually be able to compare their unique results.
Necessary skills include: data collection, measuring, and graphing.
Teachers may elaborate this lesson in many ways, which will be mentioned
in a later section of this lesson.