Will poisonous plastics take you to the undertaker? (Junior Division).
The purpose of this project was to see if plastics emit a poison.
If they do, would it have any effect on planarians? The project started
off by testing 24 planarians, with a train-a-tray, to determine their
bias direction. They were sorted into four groups and exposed to
plastic-contaminated water, and one group of eight not exposed to any
plastics. Upon checking the planarians, it was found that the vinyl record group and the IV bag group had a 100% death rate, the plastic
wrap and the plastic plate had a 50% death rate, and the control had a
0% death rate. The remaining planarians were then placed in the
train-a-tray, one at a time, to reverse their bias by shocking them
until they went the other way 415 times or 80% The shock average for the
control group was 3.4 shocks, the average shocks for the plastic wrap
group was 15.5 shocks, and the highest average of shocks was the plastic
plate group which was 16.5 shocks. As predicted, the control group did
better than the groups exposed to plastic. It is apparent, then, that
plastics might emit poisonous toxins that, with long-term exposure,
could cause health problems.
Nathan Schmidt, Merino Junior High School