The science fair happened, and the younger Free-Ride offspring's project board is now home. (The teachers are still judging and grading the sixth grade projects, which means that the elder Free-Ride offspring's project board is still at school.)
Here, in pictures, are the highlights of the younger Free-Ride offspring's project:
A straightforward descriptive title. (The kid may have a future writing scientific journal articles.)
Gotta have hypotheses to test.
The equipment was not terribly fancy. Then again, except for the bread, it was stuff we already had on hand, which is a plus.
Maybe it's just me, but I always like it when science fair results depart from initial expectations. It makes it feel more like real science, I guess.
The science fair instructions from the school were emphatic that kids should not bring in potentially biohazardous specimens with their projects (and mold was among the things specifically mentioned in the "NO!" list), so the younger Free-Ride offspring took pictures. It may have been smelly, but the range of colors of mold that grew is actually kind of impressive.
My favorite part of the younger Free-Ride offspring's project is the data visualization. For each of the specimens that grew mold in each set of experimental conditions, the kid measured the mold spots (in square centimeters) and added up the total molded area on each data-collection day. Data was collected until each bread sample was totally molded over.
To generate these graphs, the younger Free-Ride offspring calculated the mean mold area for each given type of bread in a particular set of conditions on a particular day. Since each of the bread samples was 4 x 5 centimeters, the younger Free-Ride offspring drew a 4 x 5 rectangle to represent the bread sample and then plotted the average mold growth by filling in the appropriate number of squares. You can see as you go across the plots from left to right that ady by more and more squares get filled in until all 20 are filled, representing complete mold coverage.