Just a quick note on using household oven for scentific tests:
THEY DON'T WORK
The variation in them is too great and the range of temps in the average household oven goes up and down too fast to conduct a proper test. A while back (back in the uni days) I was creep testing the glue that they stick plane wings on with. I designed and constructed the jigs, test machine, data capture and environmental chamber (or oven to those in the know ).
After mapping the temp variation in the oven over a given time, it was clear that due to the heating element and the properties of the thermostat, you really couldn't get anywhere near decent results.
I'm not saying that the experiment is wrong, I'm just saying that for an experiment, household ovens are crap (I had to rip out the whole control system and replace it with something a lot more responsive.
Kaj