So, according to their oxygen production and generally look, my 7 and 2 hour elodea were dying. In each rack at least one test tube had an elodea which was crumpled to the bottom, and the elodea were beginning to stink up the whole science room!
So, when I talked to Ms.Minn and Dr.Wright yesterday, they suggested that I start a second trial. I'll fix some of the minor mistakes that I made in trial 1, and I'll take data on my trial 2 elodea for the same amount of time as my trial 1 Elodea: 7 days.
What I will change in my second trial:
I won't use parafilm. If the water evaporates, I'll add distilled water to the test tubes.
I'll cut the Elodea down more so that there isn't too much Elodea in one test tube.
I'll standardize (still have to ask Ms.Minn about this...) my results with tap water results because sometimes the dissolved oxygen sensors are not 100% accurate.
Tomorrow, I'll post pictures of my new Elodea and record the data that I took recently and the data that I'll take tomorrow!
I'm really glad that I'm doing a second trial. It was a really good idea instead of measuring the oxygen production of already dead Elodea.
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