Friday Sprog Blogging: science fair research in progress.

We're less than two weeks out from our elementary school science fair, which means that both Free-Ride offspring are in serious data collection mode. As they look ahead to having enough data to present and "analyze" (you lose points if there's not some kind of computing of a mean, preferably accompanied by bar graphs -- heaven help the child exploring a question which yields qualitative results), I figured we should check in with some notes from the experimental trenches.

The younger Free-Ride offspring has been studying mold-growth on a selection of breads under various conditions (including exposure to light, air flow, moisture, and temperature).

Mold has grown (and on some but not all of the samples -- so there will be differences to explain). Quantifying the amount of mold that has grown on a sample (either by counting wee spots or by using a ruler to measure moldy regions) and recording those data in the lab notebook takes rather longer than the younger Free-Ride offspring had anticipated. Also, while the younger Free-Ride offspring digs wearing the powdered latex gloves to handle the bread samples, the fact that the moldy bread has a distinctive (and unpleasant) odor was a complete surprise.

Dr. Free-Ride's better half is concerned that this is evidence that we have sheltered our kids from the normal operations of the natural world.

The elder Free-Ride offspring's study of whether a rabbit (this rabbit) relies more on sight or smell to locate treats hit a little bit of a snag. The original experiment involved putting treats (or non-treats) in hard plastic vessels --some of them clear, others not, some with slots in them (making it possible to smell what's inside the container), others completely sealed up -- and to observe and record Snowflake's reaction.

From those early trials, we learned that Snowflake was pretty quick in her assessment that she couldn't get inside those containers herself. Secure in that knowledge, she would give up and start munching the timothy hay in her run. Moreover, she discovered that within about 15 minutes of her giving up, the elder Free-Ride offspring would also give up and remove those annoyingly impossible containers from the run -- often giving the rabbit one of the treats when the containers were extracted.

Clearly, the rabbit was too smart for the original experimental design.

However, within the last week the elder Free-Ride offspring has been constructing mini bales of timothy hay, some with treats in them and some not, and has observed Snowflake's differential reaction to them. Ultimately, the data analysis here may require coming up with a scale of smelliness (i.e., of how easy or hard particular treats are to smell). We'll see how that goes.

Meanwhile, I'm making sure both Free-Ride offspring consult literature relevant to the systems they are studying. And I'm getting a new can of spray adhesive so that the display-board assembly proceed without incident.

One response so far

  • Super Sally says:

    On familiarity with mold in the real world . . .

    I do remember being told by Uncle Fishy's AP Bio teacher, JP, that when the mold samples were insufficient to supply all students for the penicillin experiment in AP Bio lab, Uncle Fishy came to the rescue. He suddenly remembered that he could supply more bread mold from a number of uneaten bag lunches languishing in his HS locker and ran to retrieve them. The lab work proceeded with all students participating.

    So the "Real World" familiarity with such substances may "grow" as YO travels through the educational system. It may help to keep a can of air freshener as a standard locker item.